Semiconductor device

Abstract

To uniform application of a control voltage to a plurality of semiconductor elements.SOLUTION: A semiconductor device A1 includes a first semiconductor element 21A having a first control electrode, a second semiconductor element 22A having a second control electrode, a third semiconductor element 23A having a third control electrode, a control terminal 11D, and a first conductive member 3A that electrically connects each control electrode and the control terminal 11D. The control terminal 11D is disposed on one side of the first semiconductor element 21A in a Y direction. The first conductive member 3A includes a first branch portion 31A joined to the first control electrode, a second branch portion 32A joined to the second control electrode, a third branch portion 33A joined to the third control electrode, a terminal branch portion 34A electrically connected to the control terminal 11D, a first coupling portion 35A coupling the first branch portion 31A and the second branch portion 32A, a second coupling portion 36A coupling the second branch portion 32A and the third branch portion 33A, and a third coupling portion 37A interposed between the third branch portion 33A and the terminal branch portion 34A.SELECTED DRAWING: Figure 24

Description

[Technical Field]

[0001] The present disclosure relates to semiconductor devices. [Background technology]

[0002] Conventionally, a semiconductor device includes a lead frame including a die pad and multiple leads, a transistor mounted on the die pad, wires connecting each electrode of the transistor to the leads, and a sealing resin that seals the transistor and the wires (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-174951

[0004] [overview] Some semiconductor devices incorporate multiple transistors depending on the current they carry. The transistors are connected in parallel. That is, the control electrode and drive electrode of each transistor are connected to a single pad via wires. In this case, for example, the lengths of the wires connected to the control electrodes of each transistor are different. This results in variations in the electrical characteristics of each transistor, such as the inductance (L) and resistance (R) between the lead and the control electrode. Furthermore, there is a concern that the application of control voltages may become uneven due to the conduction paths to the control electrodes of each transistor. Such differences in electrical characteristics affect the operation of each transistor, such as its on / off timing. The semiconductor device described above is used, for example, in an inverter circuit or a DC-DC converter circuit. In such cases, a large margin is required in the design to account for variations in the transistors included in each of the two semiconductor devices.

[0005] A semiconductor device according to one aspect of the present disclosure includes a first semiconductor element having a switching function and including a first control electrode, a second semiconductor element having a switching function and including a second control electrode, a third semiconductor element having a switching function and including a third control electrode, a control terminal, and a first conductive member that electrically connects the first control electrode, the second control electrode, and the third control electrode to the control terminal, wherein the first semiconductor element, the second semiconductor element, and the third semiconductor element are arranged from one side to the other in a first direction. the control terminal is disposed on one side of the first semiconductor element in the first direction, and the first conductive member has a first branch joined to the first control electrode, a second branch joined to the second control electrode, a third branch joined to the third control electrode, and a terminal branch connected to the control terminal, a first connecting portion connecting the first branch and the second branch, a second connecting portion connecting the second branch and the third branch, and a third connecting portion interposed between the third branch and the terminal branch.

[0006] Another aspect of the present disclosure provides a semiconductor device comprising: a first semiconductor element having a switching function and including a first control electrode; a second semiconductor element having a switching function and including a second control electrode; a third semiconductor element having a switching function and including a third control electrode; a control terminal; and a first conductive member that conducts the first control electrode, the second control electrode, and the third control electrode to the control terminal, wherein the first semiconductor element, the second semiconductor element, and the third semiconductor element are arranged in this order from one side to the other side in a first direction, the control terminal is disposed on the one side in the first direction relative to the first semiconductor element, and the first conductive member comprises a first branch portion, a second branch portion, a third branch portion, a terminal branch portion, a first connecting portion, a second connecting portion, a first relay portion, a second relay portion, a third connecting portion, a The power supply has a third relay portion and a fourth connecting portion, wherein the first branch portion is joined to the first control electrode, the second branch portion is joined to the second control electrode, the third branch portion is joined to the third control electrode, the terminal branch portion is conductive to the control terminal, the first connecting portion connects the first branch portion and the second branch portion, the second connecting portion connects the second branch portion and the third branch portion, the first relay portion extends from the first connecting portion in a second direction perpendicular to the first direction, the second relay portion extends from the second connecting portion in the second direction, the third connecting portion connects the first relay portion and the second relay portion, the third relay portion extends from the third connecting portion in the second direction, and the fourth connecting portion is interposed between the third relay portion and the terminal branch portion. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing a semiconductor device according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing the semiconductor device of the first embodiment. [Figure 3] FIG. 3 is a plan view showing the semiconductor device of the first embodiment. [Figure 4] FIG. 4 is a side view showing the semiconductor device of the first embodiment. [Figure 5]FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. [Figure 7] FIG. 7 is a partially enlarged view of FIG. [Figure 8] FIG. 8 is a plan view showing a semiconductor device according to a modified example. [Figure 9] FIG. 9 is a plan view showing the semiconductor device of the second embodiment. [Figure 10] FIG. 10 is a perspective view showing a semiconductor device according to the third embodiment. [Figure 11] FIG. 11 is a plan view of the semiconductor device of FIG. [Figure 12] FIG. 12 is a side view of the semiconductor device of FIG. [Figure 13] FIG. 13 is a cross-sectional view taken along line 13-13 in FIG. [Figure 14] FIG. 14 is a plan view showing a semiconductor device according to a modified example. [Figure 15] FIG. 15 is a plan view showing a semiconductor device according to the fourth embodiment. [Figure 16] FIG. 16 is a partially enlarged plan view of the semiconductor device of FIG. [Figure 17] FIG. 17 is a plan view showing a semiconductor device according to the fifth embodiment. [Figure 18] FIG. 18 is a partially enlarged plan view of the semiconductor device of FIG. [Figure 19] FIG. 19 is a plan view showing a semiconductor device according to the sixth embodiment. [Figure 20] FIG. 20 is a partially enlarged plan view of the semiconductor device of FIG. [Figure 21] FIG. 21 is a plan view showing a semiconductor device according to the seventh embodiment of the present disclosure. [Figure 22] FIG. 22 is a bottom view showing the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 23] FIG. 23 is a perspective view of a main part of a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 24]FIG. 24 is a plan view of a main part showing a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 25] FIG. 25 is a cross-sectional view taken along line VV in FIG. [Figure 26] FIG. 26 is a cross-sectional view taken along line VI-VI in FIG. [Figure 27] FIG. 27 is a plan view of a main part showing a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 28] FIG. 28 is a perspective view showing a first conductive member of a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 29] FIG. 29 is a front view showing a first conductive member of a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 30] FIG. 30 is a plan view showing a first conductive member of a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 31] FIG. 31 is a side view showing a first conductive member of a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 32] FIG. 32 is a perspective view showing a first conductive member of a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 33] FIG. 33 is a plan view showing a first conductive member of a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 34] FIG. 34 is a front view showing a first conductive member of a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 35] FIG. 35 is a side view showing a first conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 36] FIG. 36 is a perspective view showing a second conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 37] FIG. 37 is a plan view showing a second conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 38] FIG. 38 is a front view showing a second conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 39] FIG. 39 is a side view showing a second conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 40] FIG. 40 is a perspective view showing a second conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 41] FIG. 41 is a front view showing a second conductive member of a semiconductor device according to a seventh embodiment of the present disclosure. [Figure 42] FIG. 42 is a plan view showing a second conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 43] FIG. 43 is a side view showing a second conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 44] FIG. 44 is a perspective view showing a third conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 45] FIG. 45 is a plan view showing a third conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 46] FIG. 46 is a front view showing a third conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 47] FIG. 47 is a side view showing a third conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 48] FIG. 48 is a perspective view showing a fourth conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 49] FIG. 49 is a front view showing a fourth conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 50] FIG. 50 is a plan view showing a fourth conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 51] FIG. 51 is a side view showing the fourth conductive member of the semiconductor device according to the seventh embodiment of the present disclosure. [Figure 52] FIG. 52 is a plan view of a main part showing a semiconductor device according to the eighth embodiment of the present disclosure. [Figure 53] FIG. 53 is a perspective view showing a first conductive member of a semiconductor device according to the eighth embodiment of the present disclosure. [Figure 54] FIG. 54 is a front view showing a first conductive member of a semiconductor device according to an eighth embodiment of the present disclosure. [Figure 55]FIG. 55 is a plan view showing a first conductive member of a semiconductor device according to an eighth embodiment of the present disclosure. [Figure 56] FIG. 56 is a side view showing a first conductive member of a semiconductor device according to an eighth embodiment of the present disclosure. [Figure 57] FIG. 57 is a perspective view showing a first conductive member of a semiconductor device according to the eighth embodiment of the present disclosure. [Figure 58] FIG. 58 is a plan view showing a first conductive member of a semiconductor device according to an eighth embodiment of the present disclosure. [Figure 59] FIG. 59 is a front view showing a first conductive member of a semiconductor device according to an eighth embodiment of the present disclosure. [Figure 60] FIG. 60 is a side view showing the first conductive member of the semiconductor device according to the eighth embodiment of the present disclosure. [Figure 61] FIG. 61 is a perspective view showing a second conductive member of the semiconductor device according to the eighth embodiment of the present disclosure. [Figure 62] FIG. 62 is a plan view showing a second conductive member of the semiconductor device according to the eighth embodiment of the present disclosure. [Figure 63] FIG. 63 is a front view showing a second conductive member of the semiconductor device according to the eighth embodiment of the present disclosure. [Figure 64] FIG. 64 is a side view showing a second conductive member of the semiconductor device according to the eighth embodiment of the present disclosure. [Figure 65] FIG. 65 is a perspective view showing a second conductive member of the semiconductor device according to the eighth embodiment of the present disclosure. [Figure 66] FIG. 66 is a front view showing a second conductive member of the semiconductor device according to the eighth embodiment of the present disclosure. [Figure 67] FIG. 67 is a plan view showing a second conductive member of the semiconductor device according to the eighth embodiment of the present disclosure. [Figure 68] FIG. 68 is a side view showing a second conductive member of the semiconductor device according to the eighth embodiment of the present disclosure. [Figure 69] FIG. 69 is a perspective view showing a first conductive member of a semiconductor device according to a ninth embodiment of the present disclosure. [Figure 70]FIG. 70 is a front view showing a first conductive member of a semiconductor device according to a ninth embodiment of the present disclosure. [Figure 71] FIG. 71 is a plan view showing a first conductive member of a semiconductor device according to a ninth embodiment of the present disclosure. [Figure 72] FIG. 72 is a perspective view showing a first conductive member of a semiconductor device according to a ninth embodiment of the present disclosure. [Figure 73] FIG. 73 is a plan view showing a first conductive member of a semiconductor device according to a ninth embodiment of the present disclosure. [Figure 74] FIG. 74 is a front view showing a first conductive member of a semiconductor device according to a ninth embodiment of the present disclosure.

[0008] [Detailed explanation] Hereinafter, embodiments and modified examples will be described with reference to the drawings. The embodiments and modified examples shown below are examples of configurations and methods for embodying the technical ideas, and are not intended to limit the materials, shapes, structures, arrangements, dimensions, etc. of each component to those described below. Various modifications can be made to each of the following embodiments and modified examples. Furthermore, the following embodiments and modified examples can be combined with each other within the scope of technical compatibility.

[0009] In this specification, "a state in which component A is connected to component B" includes a case in which component A and component B are directly physically connected, as well as a case in which component A and component B are indirectly connected via another component that does not affect the electrical connection state.

[0010] Similarly, "a state in which component C is provided between component A and component B" includes a case in which component A and component C, or component B and component C, are directly connected, as well as a case in which component A and component C, or component B and component C, are indirectly connected via another component that does not affect the electrical connection state.

[0011] (First embodiment) A semiconductor device A10 of the first embodiment will be described with reference to FIGS. 1 to 6, the semiconductor device A10 includes a first die pad 11, a second die pad 12, a plurality of leads 21 to 27, first switching elements 30a and 30b, second switching elements 40a and 40b, and a sealing resin 90. The semiconductor device A10 also includes a first drive connection member 53, a second drive connection member 54, a first control connection member 51, a second control connection member 57, a first source connection member 52, and a second source connection member 56.

[0012] [Sealing resin] The sealing resin 90 is formed so as to cover the first die pad 11, the second die pad 12, the first switching elements 30a, 30b, and the second switching elements 40a, 40b. The sealing resin 90 is also formed so as to cover a portion of the plurality of leads 21-27.

[0013] 1 and 2, the sealing resin 90 is formed in a flat rectangular parallelepiped shape. In this specification, "rectangular parallelepiped" includes a rectangular parallelepiped with chamfered corners and ridges, and a rectangular parallelepiped with rounded corners and ridges. In addition, some or all of the constituent surfaces may be uneven, or the constituent surfaces may be curved or composed of multiple surfaces.

[0014] The sealing resin 90 is made of a synthetic resin having electrical insulation properties. In one example, the sealing resin 90 is an epoxy resin. The synthetic resin constituting the sealing resin 90 is colored, for example, black. In FIGS. 3 to 6, the sealing resin 90 is indicated by a dashed line, and components within the sealing resin 90 are indicated by solid lines. In the following description, the thickness direction of the sealing resin 90 is referred to as the thickness direction Z, one direction perpendicular to the thickness direction Z is referred to as the horizontal direction X, and a direction perpendicular to the thickness direction Z and the horizontal direction X is referred to as the vertical direction Y. The horizontal direction X corresponds to the second direction, and the vertical direction Y corresponds to the first direction.

[0015] The sealing resin 90 has a resin main surface 901, a resin back surface 902, and first to fourth resin side surfaces 903 to 906. The resin main surface 901 and the resin back surface 902 face in opposite directions in the thickness direction Z. The first to fourth resin side surfaces 903 to 906 face in any direction parallel to the resin main surface 901 and the resin back surface 902. The first resin side surface 903 and the second resin side surface 904 face in opposite directions in the vertical direction Y. The third resin side surface 905 and the fourth resin side surface 906 face in opposite directions in the horizontal direction X.

[0016] 3 is a view of the semiconductor device A10 viewed from the side of a resin main surface 901 of the sealing resin 90. As shown in Fig. 3, when the semiconductor device A10 is viewed from the thickness direction Z, the shape of the sealing resin 90 is a rectangle whose long side direction is the horizontal direction X and whose short side direction is the vertical direction Y. The first resin side surface 903 and the second resin side surface 904 are side surfaces that extend along the horizontal direction X, and the third resin side surface 905 and the fourth resin side surface 906 are side surfaces that extend along the vertical direction Y.

[0017] [First die pad, second die pad] The first die pad 11 and the second die pad 12 are formed in the shape of a rectangular plate. The first die pad 11 and the second die pad 12 are made of, for example, Cu (copper). In this embodiment, "made of Cu" means that the die pad is made of Cu or an alloy containing Cu. Note that the term "made of Cu" also includes a die pad having a plating layer formed on part or the entire surface.

[0018] The first die pad 11 has a main surface 111, a back surface 112, and a first side surface 113 to a fourth side surface 116. The main surface 111 and the back surface 112 face opposite each other in the thickness direction Z. The main surface 111 of the first die pad 11 faces the same side as the resin main surface 901 of the sealing resin 90. The first side surface 113 to the fourth side surface 116 face either the horizontal direction X or the vertical direction Y. In this embodiment, the first side surface 113 and the second side surface 114 face opposite each other in the vertical direction Y, and the third side surface 115 and the fourth side surface 116 face opposite each other in the horizontal direction X.

[0019] The second die pad 12 has a main surface 121, a back surface 122, and a first side surface 123 to a fourth side surface 126. The main surface 121 and the back surface 122 face opposite each other in the thickness direction Z. The main surface 121 of the second die pad 12 faces the same side as the resin main surface 901 of the sealing resin 90. The first side surface 123 to the fourth side surface 126 face either the horizontal direction X or the vertical direction Y. In this embodiment, the first side surface 123 and the second side surface 124 face opposite each other in the vertical direction Y, and the third side surface 125 and the fourth side surface 126 face opposite each other in the horizontal direction X.

[0020] The first die pad 11 and the second die pad 12 are arranged so that their respective main surfaces 111, 121 are at the same position in the thickness direction Z. The first die pad 11 and the second die pad 12 have the same thickness. The thickness of the first die pad 11 and the second die pad 12 is 1 mm or more and 3 mm or less. The thickness of the first die pad 11 and the second die pad 12 is preferably, for example, 2 mm or more and 3 mm or less. The back surface 112 of the first die pad 11 and the back surface 122 of the second die pad 12 are at the same position in the thickness direction Z. As shown in FIG. 2 , the back surface 112 of the first die pad 11 and the back surface 122 of the second die pad 12 are exposed from a resin back surface 902 of the sealing resin 90. In this embodiment, the back surface 112 of the first die pad 11, the back surface 122 of the second die pad 12, and the resin back surface 902 of the sealing resin 90 are flush with each other.

[0021] The first die pad 11 and the second die pad 12 are arranged along the horizontal direction X. The fourth side surface 116 of the first die pad 11 and the third side surface 125 of the second die pad 12 face each other. The distance between the first die pad 11 and the second die pad 12 is equal to or less than the thickness of the first die pad 11 and the second die pad 12, for example, 1 mm or more and 3 mm or less. The first die pad 11 and the second die pad 12 are arranged in the vertical direction Y so that their first side surfaces 113, 123 are at the same position.

[0022] [Lead] As shown in FIGS. 1 to 3, the semiconductor device A10 includes a plurality of leads 21 to 27 (seven in this embodiment). Each of the leads 21 to 27 protrudes from a first resin side surface 903 of the sealing resin 90. Each of the leads 21 to 27 extends in the vertical direction Y. Each of the leads 21 to 27 is arranged along the horizontal direction X. In this embodiment, the leads 21 to 27 are arranged in this order from the third resin side surface 905 side of the sealing resin 90 toward the fourth resin side surface 906. The horizontal direction X is the direction in which the first die pad 11 and the second die pad 12 are arranged. Therefore, the leads 21 to 27 are arranged along the arrangement direction of the first die pad 11 and the second die pad 12. Each of the leads 21 to 27 is made of Cu. The semiconductor device A10 of this embodiment has a first control lead 21, a first source lead 22, a first drive lead 23, a second drive lead 24, an output lead 25, a second source lead 26, and a second control lead 27 as leads.

[0023] [1st control lead] 3, the first control lead 21 has a pad portion 211, a base portion 212, and a substrate connection portion 213. The pad portion 211 is disposed away from the first die pad 11 in the vertical direction Y toward the first resin side surface 903 of the sealing resin 90. The base portion 212 extends from the pad portion 211 in the vertical direction Y and protrudes from the first resin side surface 903 of the sealing resin 90. The substrate connection portion 213 extends in the vertical direction Y from the tip of the base portion 212. The base portion 212 is formed to be wider in the horizontal direction X than the substrate connection portion 213. In the horizontal direction X, the base portion 212 is formed to protrude further toward the third resin side surface 905 of the sealing resin 90 than the substrate connection portion 213.

[0024] [First Source Read] The first source lead 22 has a pad portion 221, a base portion 222, and a substrate connection portion 223. The pad portion 221 is arranged away from the first die pad 11 toward the first resin side surface 903 of the sealing resin 90 in the vertical direction Y. The base portion 222 extends from the pad portion 221 in the vertical direction Y and protrudes from the first resin side surface 903 of the sealing resin 90. The substrate connection portion 223 extends in the vertical direction Y from the tip of the base portion 222. In this embodiment, the base portion 222 of the first source lead 22 is formed to have the same width as the substrate connection portion 223.

[0025] [First driving lead] The first drive lead 23 has a connection portion 231, a base portion 232, and a substrate connection portion 233. The connection portion 231 is connected to the first die pad 11. In this embodiment, the first drive lead 23 is integral with the first die pad 11. The first drive lead 23 and the first die pad 11 constitute an integral first lead frame 14. The base portion 232 extends from the connection portion 231 in the vertical direction Y and protrudes from a first resin side surface 903 of the sealing resin 90. The substrate connection portion 233 extends from a tip of the base portion 232 in the vertical direction Y. The base portion 232 is formed to be wider in the horizontal direction X than the substrate connection portion 233. In the horizontal direction X, the base portion 232 is formed to protrude more toward the first source lead 22 side than the substrate connection portion 233.

[0026] [Second driving lead] The second drive lead 24 has a pad portion 241, a base portion 242, and a substrate connection portion 243. The pad portion 241 is arranged away from the second die pad 12 toward the first resin side surface 903 of the sealing resin 90 in the vertical direction Y. The pad portion 241 extends along the first side surface 123 of the second die pad 12. The base portion 242 extends from the pad portion 241 in the vertical direction Y and protrudes from the first resin side surface 903 of the sealing resin 90. The substrate connection portion 243 extends in the vertical direction Y from the tip of the base portion 242. The base portion 242 is formed to be wider in the horizontal direction X than the substrate connection portion 243. In the horizontal direction X, the base portion 242 is formed to protrude more toward the output lead 25 side than the substrate connection portion 243.

[0027] [Output Lead] The output lead 25 has a connection portion 251, a base portion 252, and a substrate connection portion 253. The connection portion 251 is connected to the second die pad 12. In this embodiment, the output lead 25 is integral with the second die pad 12. The output lead 25 and the second die pad 12 constitute an integral second lead frame 15. The base portion 252 extends from the connection portion 251 in the vertical direction Y and protrudes from the first resin side surface 903 of the sealing resin 90. The substrate connection portion 253 extends from the tip of the base portion 252 in the vertical direction Y. The base portion 252 is formed to be wider in the horizontal direction X than the substrate connection portion 253. In the horizontal direction X, the base portion 252 is formed to protrude more toward the second drive lead 24 side than the substrate connection portion 253.

[0028] [Second Source Read] The second source lead 26 has a pad portion 261, a base portion 262, and a substrate connection portion 263. The pad portion 261 is arranged away from the second die pad 12 toward the first resin side surface 903 of the sealing resin 90 in the vertical direction Y. The base portion 262 extends from the pad portion 261 in the vertical direction Y and protrudes from the first resin side surface 903 of the sealing resin 90. The substrate connection portion 263 extends in the vertical direction Y from the tip of the base portion 262. In this embodiment, the base portion 262 of the second source lead 26 is formed to have the same width as the substrate connection portion 263.

[0029] [Second control lead] The second control lead 27 has a pad portion 271, a base portion 272, and a substrate connection portion 273. The pad portion 271 is disposed away from the second die pad 12 in the vertical direction Y toward the first resin side surface 903 of the sealing resin 90. The base portion 272 extends from the pad portion 271 in the vertical direction Y and protrudes from the first resin side surface 903 of the sealing resin 90. The substrate connection portion 273 extends in the vertical direction Y from the end of the base 272. The base portion 272 is formed to be wider in the horizontal direction X than the substrate connection portion 273. In the horizontal direction X, the base portion 272 is formed to protrude further toward the fourth resin side surface 906 of the sealing resin 90 than the substrate connection portion 273.

[0030] In this embodiment, the leads 21 to 27 have the same thickness. The thickness of each of the leads 21 to 27 is equal to or less than the thickness of the first die pad 11 and the second die pad 12. The thickness of each of the leads 21 to 27 is, for example, 0.6 mm. In each of the leads 21 to 27, the widths of the substrate connection portions 213, 223, 233, 243, 253, 263, and 273 are the same. In this specification, "same" includes errors due to manufacturing variations and the like, and also includes cases where they do not exactly match. The width of the substrate connection portion is, for example, 1.2 mm. The substrate connection portion is inserted into a component hole in a mounting board and connected to the conductor wiring of the mounting board by solder or the like (all not shown).

[0031] In this embodiment, the leads 21 to 27 are arranged so that the interval between two adjacent leads in the horizontal direction X between the first source lead 22 and the second source lead 26 is wider than the interval between the first control lead 21 and the first source lead 22 and the interval between the second source lead 26 and the second control lead 27. Furthermore, in this embodiment, the leads 22 to 26 are arranged so that the intervals between the base portions 222, 232, 242, 252, and 262 are the same.

[0032] [First switching element, second switching element] The first switching elements 30a, 30b are mounted on the main surface 111 of the first die pad 11. The second switching elements 40a, 40b are mounted on the main surface 121 of the second die pad 12. The first switching elements 30a, 30b and the second switching elements 40a, 40b are silicon carbide (SiC) chips. In this embodiment, the first switching elements 30a, 30b and the second switching elements 40a, 40b are SiC MOSFETs (metal-oxide-semiconductor field-effect transistors). The first switching elements 30a, 30b and the second switching elements 40a, 40b are elements capable of high-speed switching.

[0033] [First switching element] As shown in FIG. 3, the first switching elements 30a and 30b are formed in a flat plate shape. In this embodiment, the first switching elements 30a and 30b have a rectangular shape that is long in the lateral direction X when viewed from the thickness direction Z. The first switching elements 30a and 30b have a first element main surface 301 and a first element back surface 302. The first element main surface 301 and the first element back surface 302 face in opposite directions in the thickness direction Z. The first element main surface 301 faces the same direction as the resin main surface 901. That is, the element main surface faces the same direction as the main surface 111 of the first die pad 11. The first element back surface 302 faces the main surface 111 of the first die pad 11. The two first switching elements 30a and 30b are disposed in the center of the first die pad 11 in the lateral direction X. The two first switching elements 30a and 30b are arranged side by side in the vertical direction Y on the main surface 111 of the first die pad 11.

[0034] The first switching elements 30a and 30b have a first principal surface drive electrode 31 and a first control electrode 32 on the first element principal surface 301, and a first back surface drive electrode 33 on the first element back surface 302. The first principal surface drive electrode 31 is a source electrode. The first principal surface drive electrode 31 in this embodiment includes a main source electrode 311 and two first source electrodes 312. The first control electrode 32 is a gate electrode. The first source electrode 312 is, for example, a driver source electrode electrically connected to a circuit (driver) that drives the first switching elements 30a and 30b.

[0035] The first switching elements 30a and 30b are arranged so that their first control electrodes 32 face the same direction. In this embodiment, the two first switching elements 30a and 30b are arranged so that their first control electrodes 32 face the third side surface 115 of the first die pad 11. The two first switching elements 30a and 30b are arranged so that their first control electrodes 32 are aligned in a straight line. The first control electrode 32 is also arranged at the center of the first switching elements 30a and 30b in the vertical direction Y. The main source electrode 311 of the first principal surface drive electrode 31 is arranged so as to be aligned with the first control electrode 32 in the horizontal direction X. The two first source electrodes 312 are arranged so as to sandwich the first control electrode 32 in the vertical direction Y. The first back surface drive electrode 33 is a drain electrode. The first back surface drive electrode 33 is electrically connected to the first die pad 11 by solder.

[0036] [Second switching element] 3, the second switching elements 40a, 40b are formed in a flat plate shape. In this embodiment, the second switching elements 40a, 40b have a rectangular shape that is long in the lateral direction X when viewed in the thickness direction Z. The second switching elements 40a, 40b have a second element main surface 401 and a second element back surface 402. The second element main surface 401 and the second element back surface 402 face in opposite directions in the thickness direction Z. The second element main surface 401 faces the resin main surface 901. In other words, the element main surface faces the same direction as the main surface 121 of the second die pad 12. The second element back surface 402 faces the main surface 121 of the second die pad 12.

[0037] The second switching elements 40a, 40b have a second principal surface drive electrode 41 and a second control electrode 42 on the second element principal surface 401, and a second back surface drive electrode 43 on the second element back surface 402. The second principal surface drive electrode 41 is a source electrode. The second principal surface drive electrode 41 in this embodiment includes a main source electrode 411 and two second source electrodes 412. The second control electrode 42 is a gate electrode. The second source electrode 412 is, for example, a driver source electrode electrically connected to a circuit (driver) that drives the second switching elements 40a, 40b.

[0038] The second switching elements 40a, 40b are arranged so that their second control electrodes 42 face the same direction. In this embodiment, the two second switching elements 40a, 40b are arranged so that their second control electrodes 42 face the fourth side surface 126 of the second die pad 12. The two second switching elements 40a, 40b are arranged so that their second control electrodes 42 are aligned in a straight line. The second control electrode 42 is also arranged at the center of the second switching elements 40a, 40b in the vertical direction Y. The main source electrode 411 of the second principal surface drive electrode 41 is arranged so as to be aligned with the second control electrode 42 in the horizontal direction X. The two second source electrodes 412 are arranged so as to sandwich the second control electrode 42 in the vertical direction Y. The second back surface drive electrode 43 is a drain electrode. The second back surface drive electrode 43 is electrically connected to the second die pad 12 by solder.

[0039] [Connection parts] As shown in FIGS. 3 and 7, the semiconductor device A10 includes a first control connection member 51 and a second control connection member 57.

[0040] The first control connection member 51 connects the first control electrodes 32 of the first switching elements 30a and 30b to the first control lead 21. 7, the first control connection member 51 is a conductive plate-like member. The first control connection member 51 has a lead connection portion 511 and two electrode connection portions 512a and 512b. The lead connection portion 511 has a first end portion 511a and a second end portion 511b. The first end portion 511a is connected to the first control lead 21 by soldering. When viewed from the lateral direction X, the second end portion 511b is disposed between the two first switching elements 30a and 30b.

[0041] The electrode connections 512a and 512b are connected between the second end 511b of the lead connection portion 511 and the first control electrodes 32 of the first switching elements 30a and 30b. More specifically, the electrode connection portion 512a is connected between the second end 511b of the lead connection portion 511 and the first control electrode 32 of the first switching element 30a. The electrode connection portion 512a is connected to the first control electrode 32 by solder. The electrode connection portion 512b is connected between the second end 511b of the lead connection portion 511 and the first control electrode 32 of the first switching element 30b. The electrode connection portion 512b is connected to the first control electrode 32 by solder.

[0042] In this embodiment, the second end 511b of the lead connection portion 511 is located on a straight line connecting the first control electrodes 32 of the two first switching elements 30a, 30b, as viewed in the thickness direction Z. That is, the lead connection portion 511 has a first connection portion 511c extending along the vertical direction Y, and a second connection portion 511d extending in the horizontal direction X from the tip of the first connection portion 511c between the two first switching elements 30a, 30b, as viewed in the horizontal direction X. More specifically, the second end 511b of the lead connection portion 511 is located at the midpoint between the first control electrodes 32 of the two first switching elements 30a, 30b.

[0043] The electrode connection portion 512a extends from the second end portion 511b toward the first control electrode 32 of the first switching element 30a, and the electrode connection portion 512b extends from the second end portion 511b toward the first control electrode 32 of the first switching element 30b. Therefore, the two electrode connection portions 512a, 512b extend in opposite directions from the second end portion 511b of the lead connection portion 511.

[0044] The first control electrode 32 of the first switching element 30a is connected to the first control lead 21 via the electrode connection portion 512a and the lead connection portion 511. The first control electrode 32 of the first switching element 30b is connected to the first control lead 21 via the electrode connection portion 512b and the lead connection portion 511. The two electrode connection portions 512a, 512b have the same length. The length of the electrode connection portion 512a is the length from the second end portion 511b of the lead connection portion 511 to the first control electrode 32 of the first switching element 30a. The length of the electrode connection portion 512b is the length from the second end portion 511b of the lead connection portion 511 to the first control electrode 32 of the first switching element 30b. The two electrode connection portions 512a, 512b have the same thickness and width. The first control connection member 51 is made of Cu. The thickness of the first control connecting member 51 is not less than 0.05 mm and not more than 1.0 mm, and is preferably not less than 0.5 mm.

[0045] As shown in FIGS. 3 and 7, the second control connection member 57 connects the second control electrode 42 of the second switching elements 40a and 40b to the second control lead 27. 7, the second control connection member 57 is a conductive plate-shaped member. The second control connection member 57 has a lead connection portion 571 and two electrode connection portions 572a and 572b.

[0046] The lead connection portion 571 has a first end portion 571a and a second end portion 571b. The first end portion 571a is connected to the second control lead 27 by soldering. When viewed from the lateral direction X, the second end portion 571b is disposed between the two second switching elements 40a and 40b.

[0047] The electrode connections 572a and 572b are connected between the second end 571b of the lead connection portion 571 and the second control electrode 42 of the second switching element 40a and 40b. More specifically, the electrode connection portion 572a is connected between the second end 571b of the lead connection portion 571 and the second control electrode 42 of the second switching element 40a. The electrode connection portion 572a is connected to the second control electrode 42 by solder. The electrode connection portion 572b is connected between the second end 571b of the lead connection portion 571 and the second control electrode 42 of the second switching element 40b. The electrode connection portion 572b is connected to the second control electrode 42 by solder.

[0048] In the present embodiment, the second end 571b of the lead connection portion 571 is located on a straight line connecting the second control electrodes 42 of the two second switching elements 40a, 40b, as viewed in the thickness direction Z. That is, the lead connection portion 571 has a first connection portion 571c extending along the vertical direction Y, and a first connection portion 571d extending in the horizontal direction X from the tip of the first connection portion 571c between the two second switching elements 40a, 40b, as viewed in the horizontal direction X. More specifically, the second end 571b of the lead connection portion 571 is located at the midpoint between the second control electrodes 42 of the two second switching elements 40a, 40b.

[0049] The electrode connection portion 572a extends from the second end portion 571b toward the first control electrode 32 of the second switching element 40a, and the electrode connection portion 572b extends from the second end portion 571b toward the first control electrode 32 of the second switching element 40b. Therefore, the two electrode connection portions 572a, 572b extend in opposite directions from the second end portion 571b of the lead connection portion 571.

[0050] The second control electrode 42 of the second switching element 40a is connected to the second control lead 27 via an electrode connection portion 572a and a lead connection portion 571. The second control electrode 42 of the second switching element 40b is connected to the second control lead 27 via an electrode connection portion 572b and a lead connection portion 571. The two electrode connection portions 572a, 572b have the same length. The length of the electrode connection portion 572a is the length from the second end portion 571b of the lead connection portion 571 to the second control electrode 42 of the second switching element 40a. The length of the electrode connection portion 572b is the length from the second end portion 571b of the lead connection portion 571 to the second control electrode 42 of the second switching element 40a. The two electrode connection portions 572a, 572b have the same thickness and width. The second control connection member 57 is made of Cu. The thickness of the second control connecting member 57 is not less than 0.05 mm and not more than 1.0 mm, and is preferably not less than 0.5 mm.

[0051] As shown in FIGS. 3 and 7, the semiconductor device A10 includes a first source connecting member 52 and a second source connecting member 56. The first source connecting member 52 connects the first source electrodes 312 of the first switching elements 30a and 30b to the first source lead 22.

[0052] As shown in FIG. 7, the first source connecting member 52 is a conductive plate-like member. The first source connecting member 52 has a lead connecting portion 521 and two electrode connecting portions 522a and 522b. The lead connecting portion 521 has a first end portion 521a and a second end portion 521b. The first end portion 521a is connected to the first source lead 22 by solder. The second end portion 521b is disposed between the two first switching elements 30a and 30b. The electrode connecting portions 522a and 522b are connected between the second end portion 521b of the lead connecting portion 521 and the source electrodes 312 of the first switching elements 30a and 30b. More specifically, the electrode connecting portion 522a is connected between the second end portion 521b of the lead connecting portion 521 and the source electrode 312 of the first switching element 30a. The electrode connecting portion 522a is connected to the source electrode 312 by solder. The electrode connection portion 522b is connected between the second end portion 521b of the lead connection portion 521 and the source electrode 312 of the first switching element 30b. The electrode connection portion 522b is connected to the source electrode 312 by solder. In this embodiment, the first source connection member 52 is connected to the outer source electrode 312 of the first control electrode 32 in the two first switching elements 30a and 30b.

[0053] The source electrode 312 of the first switching element 30a is connected to the first source lead 22 via the electrode connection portion 522a and the lead connection portion 521. The source electrode 312 of the first switching element 30b is connected to the first source lead 22 via the electrode connection portion 522b and the lead connection portion 521. The two electrode connection portions 522a and 522b have the same length. The length of the electrode connection portion 522a is the length from the second end portion 521b of the lead connection portion 521 to the source electrode 312 of the first switching element 30a. The length of the electrode connection portion 522b is the length from the second end portion 521b of the lead connection portion 521 to the source electrode 312 of the first switching element 30b. The two electrode connection portions 522a and 522b have the same thickness and width. The first source connection member 52 is made of Cu. The thickness of the first source connecting member 52 is not less than 0.05 mm and not more than 1.0 mm, and is preferably not less than 0.5 mm.

[0054] As shown in FIGS. 3 and 7, the second source connecting member 56 connects the second source electrodes 412 of the second switching elements 40a and 40b to the second source lead 26. As shown in FIG. 7, the second source connecting member 56 is a conductive plate-like member. The second source connecting member 56 has a lead connecting portion 561 and two electrode connecting portions 562a and 562b. The lead connecting portion 561 has a first end portion 561a and a second end portion 561b. The first end portion 561a is connected to the first source lead 22 by solder. The second end portion 561b is disposed between the two second switching elements 40a and 40b. The electrode connecting portions 562a and 562b are connected between the second end portion 561b of the lead connecting portion 561 and the source electrodes 412 of the second switching elements 40a and 40b. More specifically, the electrode connecting portion 562a is connected between the second end portion 561b of the lead connecting portion 561 and the source electrode 412 of the second switching element 40a. The electrode connecting portion 562a is connected to the source electrode 412 by solder. The electrode connection portion 562b is connected between the second end portion 561b of the lead connection portion 561 and the source electrode 412 of the second switching element 40b. The electrode connection portion 562b is connected to the source electrode 412 by solder. In this embodiment, the second source connection member 56 is connected to the outer source electrode 412 of the second control electrode 42 of the two second switching elements 40a, 40b.

[0055] The source electrode 412 of the second switching element 40a is connected to the first source lead 22 via the electrode connection portion 562a and the lead connection portion 561. The source electrode 412 of the second switching element 40b is connected to the first source lead 22 via the electrode connection portion 562b and the lead connection portion 561. The two electrode connection portions 562a and 562b have the same length. The length of the electrode connection portion 562a is the length from the second end portion 561b of the lead connection portion 561 to the source electrode 412 of the second switching element 40a. The length of the electrode connection portion 562b is the length from the second end portion 561b of the lead connection portion 561 to the source electrode 412 of the second switching element 40b. The two electrode connection portions 562a and 562b have the same thickness and width. The second source connection member 56 is made of Cu. The thickness of the second source connecting member 56 is not less than 0.05 mm and not more than 1.0 mm, and is preferably not less than 0.5 mm.

[0056] As shown in FIGS. 3 and 7, the semiconductor device A10 includes a first drive connection member 53 and a second drive connection member . The first drive connection member 53 connects the first main surface drive electrodes 31 (main source electrodes 311) of the first switching elements 30a and 30b to the second die pad 12. The second back surface drive electrodes 43 (drain electrodes) of the second switching elements 40a and 40b are connected to the second die pad 12. The output lead 25 is connected to the second die pad 12. That is, the output lead 25 is connected to the source electrodes of the first switching elements 30a and 30b and the drain electrodes of the second switching elements 40a and 40b.

[0057] As shown in FIG. 7, the first drive connection member 53 is a conductive plate-like member called a clip. The first drive connection member 53 is formed by bending a plate-like conductive plate. The first drive connection member 53 has a strip shape extending in the horizontal direction X. In this embodiment, the first principal surface drive electrodes 31 of the two first switching elements 30a and 30b are each connected to the second die pad 12 by the first drive connection member 53. As shown in FIG. 5, one end of the first drive connection member 53 is connected to the first principal surface drive electrodes 31 of the first switching elements 30a and 30b by solder, and the other end of the first drive connection member 53 is connected to the second die pad 12 by solder. The first drive connection member 53 is made of Cu. The thickness of the first drive connection member 53 is 0.05 mm or more and 1.0 mm or less, and preferably 0.5 mm or more.

[0058] As shown in FIGS. 3 and 7, the second drive connection member 54 connects the second main surface drive electrodes 41 (main source electrodes 411) of the second switching elements 40a and 40b to the second drive lead 24.

[0059] As shown in FIG. 7, the second drive connection member 54 is a conductive plate-like member called a clip. The second drive connection member 54 is formed by bending a plate-like conductive plate. The second drive connection member 54 has a lead connection portion 541, an electrode connection portion 542, and a linking portion 543. The lead connection portion 541 extends in the horizontal direction X, similar to the pad portion 241 of the second drive lead 24. As shown in FIG. 6, the lead connection portion 541 is connected to the pad portion 241 by solder. As shown in FIGS. 3 and 7, the electrode connection portion 542 is formed in a rectangular shape. As shown in FIG. 6, the electrode connection portion 542 is connected to the second principal surface drive electrode 41 by solder. As shown in FIGS. 3 and 7, the linking portion 543 connects the lead connection portion 541 and the electrode connection portion 542. The linking portion 543 extends in the vertical direction Y from the lead connection portion 541. The connecting portion 543 is connected to the end portion of the electrode connecting portion 542 on the side of the first die pad 11. That is, each electrode connecting portion 542 extends from the connecting portion 543 in the lateral direction X. The second drive connecting member 54 is made of Cu. The thickness of the second drive connecting member 54 is not less than 0.05 mm and not more than 1.0 mm, and is preferably not less than 0.5 mm.

[0060] (action) The semiconductor device A10 has two first switching elements 30a and 30b mounted on a first die pad 11. The first control electrodes 32 of the two first switching elements 30a and 30b are connected to the first control lead 21 by a first control connection member 51. The first control connection member 51 has a lead connection portion 511 connected to the first control lead 21, and electrode connection portions 512a and 512b connected between the lead connection portion 511 and the first control electrodes 32 of the first switching elements 30a and 30b. The electrode connection portions 512a and 512b have the same length. Therefore, the length of the connecting member formed by the lead connecting portion 511 and the electrode connecting portion 512a that connects the first control electrode 32 of the first switching element 30a to the first control lead 21 is the same as the length of the connecting member formed by the lead connecting portion 511 and the electrode connecting portion 512b that connects the first control electrode 32 of the first switching element 30a to the first control lead 21. This reduces variations in electrical characteristics such as inductance and resistance between the first control electrode 32 of the first switching elements 30a and 30b and the first control lead 21.

[0061] The semiconductor device A10 has two second switching elements 40a, 40b mounted on the second die pad 12. The second control electrodes 42 of the two second switching elements 40a, 40b are connected to the second control lead 27 by a second control connection member 57. The second control connection member 57 has a lead connection portion 571 connected to the second control lead 27, and electrode connection portions 572a, 572b connected between the lead connection portion 571 and the second control electrodes 42 of the second switching elements 40a, 40b. The electrode connection portions 572a, 572b have the same length. Therefore, the length of the connecting member formed by the lead connecting portion 571 and the electrode connecting portion 572a that connects the second control electrode 42 of the second switching element 40a to the second control lead 27 is the same as the length of the connecting member formed by the lead connecting portion 571 and the electrode connecting portion 572b that connects the second control electrode 42 of the second switching element 40a to the second control lead 27. This reduces variations in electrical characteristics such as the inductance value and the resistance value between the second control electrode 42 of the second switching elements 40a and 40b and the second control lead 27.

[0062] The source electrodes 312 of the two first switching elements 30a, 30b are connected to the first source lead 22 by a first source connecting member 52. The first source connecting member 52 has a lead connecting portion 521 connected to the first source lead 22, and electrode connecting portions 522a, 522b connected between the lead connecting portion 521 and the source electrode 312. The electrode connecting portions 522a, 522b have the same length.

[0063] The source electrodes 312 of the first switching elements 30a, 30b are electrodes (driver source electrodes) connected to a drive circuit for the first switching elements 30a, 30b. The source electrodes 312 have the same potential as the main source electrodes 311. The main source electrodes 311 of the two first switching elements 30a, 30b are electrically connected to each other. Therefore, it is sufficient to connect the source electrode 312 of one of the two switching elements 30a, 30b to the drive circuit, and it is more preferable to connect both source electrodes 312.

[0064] Conventionally, the source electrodes of the two first switching elements 30a, 30b are connected to the first source lead 22 by a wire, similar to the first control electrode 32, and therefore variations in the electrical characteristics between the first source lead 22 and the source electrode 312 occur depending on the length of the wire. In the present embodiment, the length of the connecting member between the source electrode 312 of the first switching element 30a and the first source lead 22 is the same as the length of the connecting member between the source electrode 312 of the first switching element 30b and the first source lead 22. This reduces variations in the electrical characteristics between the source electrodes 312 of the first switching elements 30a, 30b and the first source lead 22.

[0065] The source electrodes 412 of the two second switching elements 40a, 40b are connected to the second source lead 26 by a second source connecting member 56. The second source connecting member 56 has a lead connecting portion 561 connected to the second source lead 26, and electrode connecting portions 562a, 562b connected between the lead connecting portion 561 and the source electrode 412. The electrode connecting portions 562a, 562b have the same length. This reduces variations in electrical characteristics such as inductance and resistance between the second source lead 26 and the source electrodes 412 of the second switching elements 40a, 40b.

[0066] (effect) As described above, this embodiment provides the following advantages. (1-1) The semiconductor device A10 has two first switching elements 30a and 30b mounted on a first die pad 11. The first control electrodes 32 of the two first switching elements 30a and 30b are connected to the first control lead 21 by a first control connection member 51. The first control connection member 51 has a lead connection portion 511 connected to the first control lead 21 and electrode connection portions 512a and 512b connected between the lead connection portion 511 and the first control electrodes 32 of the first switching elements 30a and 30b. The electrode connection portions 512a and 512b have the same length. Therefore, the lengths of the connection members between the first control lead 21 and the first control electrodes 32 of the first switching elements 30a and 30b are the same. This reduces variations in electrical characteristics such as inductance and resistance between the first control lead 21 and the first control electrodes 32 of the first switching elements 30a and 30b.

[0067] (1-2) The semiconductor device A10 has two second switching elements 40a, 40b mounted on the second die pad 12. The second control electrodes 42 of the two second switching elements 40a, 40b are connected to the second control lead 27 by a second control connection member 57. The second control connection member 57 has a lead connection portion 571 connected to the second control lead 27 and electrode connection portions 572a, 572b connected between the lead connection portion 571 and the second control electrodes 42 of the second switching elements 40a, 40b. The electrode connection portions 572a, 572b have the same length. Therefore, the lengths of the connection members between the second control lead 27 and the second control electrodes 42 of the second switching elements 40a, 40b are the same. This reduces variations in electrical characteristics such as inductance and resistance between the second control lead 27 and the second control electrodes 42 of the second switching elements 40a, 40b.

[0068] (1-3) The source electrodes 312 of the two first switching elements 30a, 30b are connected to the first source lead 22 by the first source connecting member 52. The first source connecting member 52 has a lead connecting portion 521 connected to the first source lead 22, and electrode connecting portions 522a, 522b connected between the lead connecting portion 521 and the source electrode 312. The electrode connecting portions 522a, 522b have the same length. Therefore, it is possible to reduce variations in electrical characteristics between the source electrodes 312 of the first switching elements 30a, 30b and the first source lead 22.

[0069] (1-4) The source electrodes 412 of the two second switching elements 40a, 40b are connected to the second source lead 26 by a second source connecting member 56. The second source connecting member 56 has a lead connecting portion 561 connected to the second source lead 26, and electrode connecting portions 562a, 562b connected between the lead connecting portion 561 and the source electrode 412. The electrode connecting portions 562a, 562b have the same length. Therefore, it is possible to reduce variations in electrical characteristics such as the inductance value and resistance value between the second source lead 26 and the source electrodes 412 of the second switching elements 40a, 40b.

[0070] (1-5) The semiconductor device A10 includes first switching elements 30a, 30b and second switching elements 40a, 40b within a single sealing resin 90. The first principal surface drive electrodes 31 (main source electrodes 311) of the first switching elements 30a, 30b are connected to the second die pad 12 by first drive connection members 53. The second back surface drive electrodes 43 of the second switching elements 40a, 40b are connected to the second die pad 12, and an output lead 25 is also connected to the second die pad 12. The back surface drive electrodes 33 of the first switching elements 30a, 30b are connected to the first drive lead 23, and the second principal surface drive electrodes 41 (main source electrodes 411) of the second switching elements 40a, 40b are connected to the second drive lead 24. Therefore, the semiconductor device A10 of this embodiment can configure an inverter circuit or a DC-DC converter circuit using the first switching elements 30a, 30b and the second switching elements 40a, 40b. Furthermore, the conductor lengths between the first drive lead 23 (drain lead), the second drive lead 24 (source lead), and the output lead 25 (output lead) are shortened, thereby reducing the inductance of the semiconductor device A10.

[0071] (1-6) In the semiconductor device A10, a first drive lead 23 connected to the first back-surface drive electrode 33 of the first switching elements 30a and 30b and a second drive lead 24 connected to the second main-surface drive electrode 41 (main source electrode 411) of the second switching elements 40a and 40b are arranged side by side. When the semiconductor device A10 is used as, for example, an inverter circuit, a high-potential voltage is supplied to the first drive lead 23 and a low-potential voltage is supplied to the second drive lead 24. When the first switching elements 30a and 30b are turned on and the second switching elements 40a and 40b are turned off, a current flows from the first drive lead 23 to the output lead 25. When the first switching elements 30a and 30b are turned off and the second switching elements 40a and 40b are turned on, a current flows from the output lead 25 to the second drive lead 24. When this semiconductor device A10 is operated with a high-speed control signal (for example, 1 MHz), currents flow in opposite directions relative to the semiconductor device A10 in the adjacent first drive lead 23 and second drive lead 24. The magnetic flux generated by these currents reduces the mutual inductance, thereby reducing the parasitic inductance in the semiconductor device A10.

[0072] (Modification of the first embodiment) The first embodiment can be modified and implemented as follows. The number of die pads, etc. may be changed as appropriate in the above embodiments. The semiconductor device A11 shown in FIG. 8 includes one die pad 11. Two switching elements 30a and 30b are mounted on the die pad 11. This semiconductor device A11 includes a control lead 21, a source lead 22, a first drive lead (source lead) 23a, and a second drive lead (drain lead) 24a. The second drive lead 24a is connected to the die pad 11. The control electrodes 32 of the two switching elements 30a and 30b are connected to the pad portion 211 of the control lead 21 by one first control connection member 51. The main surface drive electrodes 31 (main source electrodes 311) of the switching elements 30a and 30b are connected to the first drive lead 23a by a first drive connection member 53. In this semiconductor device A11, as in the first embodiment, the inductance and resistance of the two switching elements 30 a, 30 b relative to the control electrode 32 can be made the same, thereby reducing variations in the electrical characteristics of the switching elements 30 a, 30 b. Also, the semiconductor device may be provided with three or more die pads.

[0073] (Second embodiment) A semiconductor device A20 according to the second embodiment will be described with reference to FIG. The semiconductor device A20 of the second embodiment differs from the semiconductor device A11 shown in the modified example of the first embodiment in the shape of the control connection member. In the following description, the same components as those of the semiconductor device A10 of the first embodiment and the modified example semiconductor device A11 are denoted by the same reference numerals, and some or all of the description thereof will be omitted.

[0074] 9, the control electrodes 32 of the two switching elements 30a and 30b are connected to the pad portion 211 of the control lead 21 by one control connection member 51a. The source electrodes 311 of the two switching elements 30a and 30b are connected to the pad portion 221 of the source lead 22 by one source connection member 52a.

[0075] The control connection member 51a includes a lead connection portion 513 and electrode connection portions 514 (514a, 514b) extending from the lead connection portion 513 toward the control electrode 32 of each switching element 30a, 30b. In the semiconductor device A20 of this embodiment, the lead connection portion 513 extends in the vertical direction Y. A first end 513a of the lead connection portion 513 is connected to the control lead 21. A second end 513b of the lead connection portion 513 is located at the same position in the vertical direction Y as the control electrode 32 of the first switching element 30a. The electrode connection portions 514a, 514b branch off from the second end 513b of the lead connection portion 513. Each electrode connection portion 514a, 514b extends from the branch point 513b, which is the tip of the lead connection portion 513, to the control electrode 32 of each switching element 30a, 30b.

[0076] The electrode connection portion 514a extends in the horizontal direction X from the branch point 513b of the lead connection portion 513 and is connected to the control electrode 32 of the switching element 30a. The electrode connection portions 514a, 514b have the same thickness. The electrode connection portion 514b is longer and wider than the electrode connection portion 514a.

[0077] In the second embodiment, the widths of the electrode connection portions 514a, 514b are set in accordance with the lengths of the electrode connection portions 514a, 514b so that the resistance values ​​of the electrode connection portions 514a, 514b are the same. The length of the electrode connection portion 514a is the length from the branch point 513b of the lead connection portion 513 to the control electrode 32 of the switching element 30a. The length of the electrode connection portion 514b is the length from the branch point 513b of the lead connection portion 513 to the control electrode 32 of the switching element 30b. For example, the widths of the electrode connection portions 514a, 514b are set inversely proportional to the lengths of the electrode connection portions 514a, 514b. Note that the thickness of the electrode connection portions 514a, 514b may be changed in addition to the width.

[0078] The source connecting member 52a includes a lead connecting portion 523 and electrode connecting portions 524a, 524b extending from the lead connecting portion 523 toward the source electrode 312 of each switching element 30a, 30b. A first end 523a of the lead connecting portion 523 is connected to the source lead 22. A second end 523b of the lead connecting portion 523 is located at the same position as the source electrode 312 of the first switching element 30a in the vertical direction Y. The electrode connecting portions 524a, 524b branch off from the second end 523b of the lead connecting portion 523. Each electrode connecting portion 524a, 524b extends from the branching point 523b, which is the tip of the lead connecting portion 523, to the source electrode 312 of each switching element 30a, 30b.

[0079] The electrode connection portion 524a extends in the horizontal direction X from the branch point 523b of the lead connection portion 523 and is connected to the source electrode 312 of the switching element 30a. The electrode connection portions 524a and 524b have the same thickness. The electrode connection portion 524b is longer and wider than the electrode connection portion 524a.

[0080] In the second embodiment, the widths of the electrode connection portions 524a, 524b are set in accordance with the lengths of the electrode connection portions 524a, 524b so that the resistance values ​​of the electrode connection portions 524a, 524b are the same. The length of the electrode connection portion 524a is the length from the branch point 523b of the lead connection portion 523 to the source electrode 312 of the switching element 30a. The length of the electrode connection portion 524b is the length from the branch point 523b of the lead connection portion 523 to the source electrode 312 of the switching element 30b. For example, the widths of the electrode connection portions 524a, 524b are set inversely proportional to the lengths of the electrode connection portions 524a, 524b. Note that the thickness of the electrode connection portions 524a, 524b may be changed in addition to the width.

[0081] (effect) As described above, this embodiment provides the following advantages. (2-1) The width of the control connection member 51a is set so that the resistance values ​​of the electrode connection portions 514a, 514b connected to the control electrodes 32 of the switching elements 30a, 30b are the same. This reduces variations in the electrical characteristics from the control lead 21 to the control electrodes 32 of both switching elements 30a, 30b.

[0082] (2-2) The width of the source connecting member 52a is set so that the resistance values ​​of the electrode connecting portions 524a, 524b connected to the source electrodes 312 of the switching elements 30a, 30b are the same. This reduces variations in the electrical characteristics from the source lead 22 to the control electrodes 32 of both switching elements 30a, 30b.

[0083] (Modification of the second embodiment) 9, the semiconductor device A20 having one die pad 11 has been described, but it may also be a semiconductor device having two die pads, like the semiconductor device A10 of the first embodiment. Also, it may be a semiconductor device having three or more die pads.

[0084] (Third embodiment) A semiconductor device A30 according to the third embodiment will be described with reference to FIGS. In the semiconductor device A30 of the third embodiment, the same components as those in the semiconductor device A10 of the first embodiment are denoted by the same reference numerals, and some or all of the description thereof may be omitted.

[0085] 10 to 13, the semiconductor device A30 includes a first die pad 11, a second die pad 12, a first lead group 20a, a second lead group 20b, first switching elements 30a and 30b, second switching elements 40a and 40b, and a sealing resin 90. The semiconductor device A30 also includes a first drive connection member 53, a second drive connection member 54, a first control connection member 51, a second control connection member 57, a first source connection member 52, and a second source connection member 56.

[0086] [First lead group] 10 and 11, the first lead group 20a is composed of a first drive lead 23 and a second drive lead 24. The leads 23 and the second drive lead 24 that constitute the first lead group 20a protrude from a first resin side surface 903 of the sealing resin 90.

[0087] 11 , the first drive lead 23 is disposed closer to the fourth side surface 116 of the first die pad 11 in the lateral direction X. The second drive lead 24 is disposed closer to the third side surface 125 of the second die pad 12 in the lateral direction X. In this embodiment, the first drive lead 23 and the second drive lead 24 are disposed so that their midpoints are at the center of the sealing resin 90.

[0088] The first drive lead 23 has a connection portion 231, a base portion 232, and a substrate connection portion 233. The connection portion 231 is connected to the first side surface 113 of the first die pad 11. In this embodiment, the first drive lead 23 is integrated with the first die pad 11. The first drive lead 23 and the first die pad 11 configure an integrated first lead frame 14.

[0089] The base 232 extends from the connection portion 231 in the vertical direction Y and protrudes from a first resin side surface 903 of the sealing resin 90. The substrate connection portion 233 extends from a tip of the base 232 in the vertical direction Y. The base 232 is formed to be wider in the horizontal direction X than the substrate connection portion 233. In the horizontal direction X, the base 232 is formed to protrude further toward the third resin side surface 905 of the sealing resin 90 than the substrate connection portion 233.

[0090] The second drive lead 24 has a pad portion 241, a base portion 242, and a substrate connection portion 243. The pad portion 241 is arranged away from the second die pad 12 toward the first resin side surface 903 of the sealing resin 90 in the vertical direction Y. The pad portion 241 extends along the first side surface 113 of the first die pad 11 and the first side surface 123 of the second die pad 12. In other words, the pad portion 241 is arranged to straddle from the first side surface 113 of the first die pad 11 to the first side surface 123 of the second die pad 12. The pad portion 241 is a connection portion to which the second drive connection member 54 is connected.

[0091] The base portion 242 extends in the vertical direction Y from the pad portion 241 and protrudes from a first resin side surface 903 of the sealing resin 90. The substrate connection portion 243 extends in the vertical direction Y from the tip of the base portion 242. The base portion 242 is formed to be wider in the horizontal direction X than the substrate connection portion 243. In the horizontal direction X, the base portion 242 is formed to protrude further toward the first drive lead 23 side than the substrate connection portion 243.

[0092] [Second lead group] The second lead group 20b is composed of a first control lead 21, a first source lead 22, an output lead 25, a second source lead 26, and a second control lead 27. The leads 21, 22, 25 to 27 constituting the second lead group 20b protrude from a second resin side surface 904 of the sealing resin 90.

[0093] As shown in FIG. 11 , the first control lead 21 has a pad portion 211, a base portion 212, and a substrate connection portion 213. The pad portion 211 is disposed away from the first die pad 11 in the vertical direction Y toward the second resin side surface 904 of the sealing resin 90. The base portion 212 extends from the pad portion 211 in the vertical direction Y and protrudes from the second resin side surface 904 of the sealing resin 90. The substrate connection portion 213 extends in the vertical direction Y from the tip of the base portion 212. As shown in FIG. 11 , the base portion 212 is formed to be wider in the horizontal direction X than the substrate connection portion 213. In the horizontal direction X, the base portion 212 is formed to protrude more toward the third resin side surface 905 of the sealing resin 90 than the substrate connection portion 213.

[0094] 11, the first source lead 22 has a pad portion 221, a base portion 222, and a substrate connection portion 223. The pad portion 221 is disposed away from the first die pad 11 toward the second resin side surface 904 of the sealing resin 90 in the vertical direction Y. The base portion 222 extends from the pad portion 221 in the vertical direction Y and protrudes from the second resin side surface 904 of the sealing resin 90. The substrate connection portion 223 extends in the vertical direction Y from the tip of the base portion 222.

[0095] 11, the second source lead 26 has a pad portion 261, a base portion 262, and a substrate connection portion 263. The pad portion 261 is disposed away from the second die pad 12 toward the second resin side surface 904 of the sealing resin 90 in the vertical direction Y. The base portion 262 extends from the pad portion 261 in the vertical direction Y and protrudes from the second resin side surface 904 of the sealing resin 90. The substrate connection portion 263 extends in the vertical direction Y from the tip of the base portion 262.

[0096] 11, the second control lead 27 has a pad portion 271, a base portion 272, and a substrate connection portion 273. The pad portion 271 is disposed away from the second die pad 12 toward the second resin side surface 904 of the sealing resin 90 in the vertical direction Y. The base portion 272 extends from the pad portion 271 in the vertical direction Y and protrudes from the second resin side surface 904 of the sealing resin 90. The substrate connection portion 273 extends in the vertical direction Y from the end of the base portion 272. The base portion 272 is formed to be wider in the horizontal direction X than the substrate connection portion 273. In the horizontal direction X, the base portion 272 is formed to protrude further toward the fourth resin side surface 906 of the sealing resin 90 than the substrate connection portion 273.

[0097] The output lead 25 has a connection portion 251, a base portion 252, and a substrate connection portion 253. The connection portion 251 is connected to the second side surface 124 of the second die pad 12. In this embodiment, the output lead 25 is integrated with the second die pad 12. The output lead 25 and the second die pad 12 form an integrated second lead frame 15.

[0098] The connection portion 251 includes a die connection portion 251a and a pad portion 251b. The die connection portion 251a is connected to a portion of the second side surface 124 of the second die pad 12 that is closer to the third side surface 125. The pad portion 251b extends from the die connection portion 251a toward the first source lead 22 along the horizontal direction X. The pad portion 251b is disposed at a position overlapping with the first drive lead 23 when viewed from the vertical direction Y.

[0099] The base 252 extends from the connection portion 251 in the vertical direction Y and protrudes from the second resin side surface 904 of the sealing resin 90. The substrate connection portion 253 extends from the tip of the base 252 in the vertical direction Y. The base 252 is formed to be wider in the horizontal direction X than the substrate connection portion 253. The base 252 is formed wide so that a part of the base 252 overlaps with the first drive lead 23 and another part overlaps with the second drive lead 24 in the vertical direction Y. The substrate connection portion 253 is disposed at the center of the base 252 in the horizontal direction X. The substrate connection portion 253 is also disposed at the center of the sealing resin 90 in the horizontal direction X.

[0100] 12, the leads 23 and 24 of the first lead group 20a and the leads 21, 22, and 25 to 27 of the second lead group 20b are bent, as indicated by the dashed dotted lines, toward the resin main surface 901 of the sealing resin 90. The semiconductor device A10 in which the leads 21 to 25 are formed in this manner is a semiconductor package that is surface-mounted on a mounting board.

[0101] [Connection parts] As shown in FIGS. 10 and 11, the semiconductor device A30 includes a first control connection member 51 and a second control connection member 57.

[0102] The first control connection member 51 connects the first control leads 21 of the second lead group 20b and the first control electrodes 32 of the first switching elements 30a and 30b. The first control connection member 51 includes a lead connection portion 511, and electrode connection portions 512a and 512b between the lead connection portion 511 and the first control electrodes 32 of the first switching elements 30a and 30b. The electrode connection portions 512a and 512b have the same length.

[0103] The second control connection member 57 connects the second control leads 27 of the second lead group 20b and the second control electrodes 42 of the second switching elements 40a, 40b. The second control connection member 57 includes a lead connection portion 571, and electrode connection portions 572a, 572b between the lead connection portion 571 and the second control electrodes 42 of the second switching elements 40a, 40b. The electrode connection portions 572a, 572b have the same length.

[0104] As shown in FIGS. 10 and 11, the semiconductor device A30 includes a first source connecting member 52 and a second source connecting member 56. The first source connecting member 52 of the present embodiment connects the source electrode 312 of the first switching element 30b to the first source lead 22. The second source connecting member 56 of the present embodiment electrically connects the source electrode 412 of the second switching element 40b to the second source lead 26.

[0105] As shown in FIGS. 10 and 11, the semiconductor device A30 includes a first drive connection member 53 and a second drive connection member . The first drive connection member 53 of this embodiment is a strip-shaped plate member extending in the arrangement direction (vertical direction Y) of the first switching elements 30a, 30b. The first drive connection member 53 connects the main surface drive electrodes 31 (main source electrodes 311) of the first switching elements 30a, 30b to the pad portions 251b of the output leads 25. Therefore, the first main surface drive electrodes 31 of the first switching elements 30a, 30b are connected to the second die pad 12 via the first drive connection member 53 and the pad portions 251b of the output leads 25. The first drive connection member 53 is made of Cu. The thickness of the first drive connection member 53 is 0.05 mm or more and 1.0 mm or less, and preferably 0.5 mm or more.

[0106] The second drive connection member 54 of this embodiment is a strip-shaped plate member extending in the arrangement direction (vertical direction Y) of the second switching elements 40a, 40b. The second drive connection member 54 connects the second principal surface drive electrodes 41 (main source electrodes 411) of the second switching elements 40a, 40b to the pad portions 241 of the second drive leads 24. The second drive connection member 54 is made of Cu. The thickness of the second drive connection member 54 is 0.05 mm or more and 1.0 mm or less, and preferably 0.5 mm or more.

[0107] As described above, the semiconductor device A30 of the third embodiment has the following advantages. (3-1) The first control connection member 51 can reduce variations in electrical characteristics such as inductance and resistance between the first control lead 21 and the first control electrodes 32 of the first switching elements 30a and 30b. In addition, the second control connection member 57 can reduce variations in electrical characteristics such as inductance and resistance between the second control lead 27 and the second control electrodes 42 of the second switching elements 40a and 40b.

[0108] (3-2) The first lead group 20a, which includes the drive leads 23 and 24, protrudes from a first resin side surface 903 of the sealing resin 90. The second lead group 20b, which includes the control leads 21 and 27, the source leads 22 and 26, and the output lead 25, protrudes from a second resin side surface 904 of the sealing resin 90. In other words, the first lead group 20a and the second lead group 20b protrude from different resin side surfaces. Therefore, the spacing between the leads is ensured, and an increase in the size of the sealing resin 90, i.e., the size of the semiconductor device A30, can be prevented.

[0109] (3-3) The drive leads 23, 24 are arranged to protrude from a first resin side surface 903 of the sealing resin 90, and the output lead 25 is arranged to protrude from a second resin side surface 904 opposite the first resin side surface 903. Therefore, the first drive lead 23, the first switching elements 30a, 30b, and the pad portion 251b of the output lead 25 overlap in the vertical direction Y. This allows current to flow in a substantially linear manner between the first drive lead 23 and the output lead 25 in the semiconductor device A30. Furthermore, a portion of the output lead 25 overlaps with the second drive lead 24 in the vertical direction Y. This allows current to flow in a substantially linear manner between the second drive lead 24 and the output lead 25 in the semiconductor device A30.

[0110] (Example of change) The second embodiment can be modified as follows. 14, the first lead group 20a includes drive leads 23 and 24 and an output lead 25, and the second lead group 20b includes control leads 21 and 27 and source leads 22 and 26. The drive leads 23 and 24 are arranged adjacent to each other. Therefore, as shown in (1-6) of the first embodiment, the parasitic inductance in the semiconductor device A31 can be reduced, and the variation in inductance value as an electrical characteristic can be reduced.

[0111] (Fourth embodiment) A semiconductor device A40 of the fourth embodiment will be described with reference to FIGS. In the semiconductor device A40 of the fourth embodiment, the same components as those in the semiconductor device A30 of the third embodiment are denoted by the same reference numerals, and some or all of the description thereof may be omitted.

[0112] As shown in Figures 15 and 16, the semiconductor device A40 of the fourth embodiment has three first switching elements 30a, 30b, and 30c mounted on the first die pad 11 and three second switching elements 40a, 40b, and 40c mounted on the second die pad 12.

[0113] The three first switching elements 30a, 30b, and 30c are arranged in the vertical direction Y. Each of the first switching elements 30a, 30b, and 30c has a first control electrode 32, a first main surface drive electrode 31, and a first back surface drive electrode 33. The three first switching elements 30a, 30b, and 30c are arranged so that their first control electrodes 32 face the same direction. In this embodiment, the three first switching elements 30a, 30b, and 30c are arranged so that their first control electrodes 32 face the third side surface 115 of the first die pad 11. The three first switching elements 30a, 30b, and 30c are arranged so that their first control electrodes 32 are aligned in a straight line.

[0114] The three second switching elements 40a, 40b, and 40c are arranged in the vertical direction Y. Each of the second switching elements 40a, 40b, and 40c has a second control electrode 42, a second main surface drive electrode 41, and a second back surface drive electrode 43. The three second switching elements 40a, 40b, and 40c are arranged so that their second control electrodes 42 face the same direction. In this embodiment, the three second switching elements 40a, 40b, and 40c are arranged so that their second control electrodes 42 face the fourth side surface 126 of the second die pad 12. The three second switching elements 40a, 40b, and 40c are arranged so that their second control electrodes 42 are aligned in a straight line.

[0115] The semiconductor device A40 includes a first control connection member 61 and a second control connection member 67. The first control connection member 61 connects the first control electrodes 32 of the first switching elements 30a, 30b, and 30c to the first control lead 21. The first control connection member 61 is a conductive plate-shaped member. The first control connection member 61 has a lead connection portion 611, a coupling portion 612, and an electrode connection portion 613.

[0116] The lead connection portion 611 is formed in a linear shape. The lead connection portion 611 is arranged to extend along the vertical direction Y in which the first switching elements 30a, 30b, and 30c are arranged. The lead connection portion 611 is arranged on the side of the first control electrode 32 of each of the first switching elements 30a, 30b, and 30c. In this embodiment, the lead connection portion 611 is arranged so as not to overlap with each of the first switching elements 30a, 30b, and 30c when viewed from the thickness direction Z. That is, the lead connection portion 611 in this embodiment is arranged between the third side surface 115 of the first die pad 11 and the first switching elements 30a, 30b, and 30c when viewed from the thickness direction Z.

[0117] The lead connection portion 611 has a first end 611a and a second end 611b. The first end 611a is connected to the pad portion 211 of the first control lead 21. Therefore, the second end 611b is located on the opposite side of the first control lead 21 in the vertical direction Y. In this embodiment, the second end 611b of the lead connection portion 611 is located at the same position as the first control electrode 32 of the first switching element 30a that is located farthest from the first control lead 21 among the multiple first switching elements 30a, 30b, and 30c in the vertical direction Y in which the multiple first switching elements 30a, 30b, and 30c are arranged. In other words, the second end 611b of the lead connection portion 611 is located so as to overlap the first control electrode 32 of the first switching element 30a that is located farthest from the first control lead 21 when viewed from the horizontal direction X.

[0118] A coupling portion 612 is connected to the second end portion 611b of the lead connecting portion 611. The coupling portion 612 is formed to extend in the lateral direction X from the second end portion 611b of the lead connecting portion 611. In this embodiment, the coupling portion 612 extends from the lead connecting portion 611 toward the first control electrode 32 of the first switching element 30a.

[0119] The electrode connection portion 613 is connected to the tip of the coupling portion 612. The electrode connection portion 613 is linear and extends in the vertical direction Y. The electrode connection portion 613 is arranged parallel to the lead connection portion 611. The electrode connection portion 613 is also arranged on the same line on which the first control electrodes 32 of the first switching elements 30a, 30b, and 30c are arranged. When viewed from the thickness direction Z, the electrode connection portion 613 overlaps with the first control electrodes 32 of the first switching elements 30a, 30b, and 30c.

[0120] The electrode connecting portion 613 has a first end 613a and a second end 613b. The first end 613a of the electrode connecting portion 613 is connected to the tip of the linking portion 612. The first end 613a of the electrode connecting portion 613 is disposed at a position overlapping the first control electrode 32 of the first switching element 30a in the thickness direction Z. The first end 613a of the electrode connecting portion 613 is connected to the first control electrode 32 of the first switching element 30a by solder.

[0121] The second end 613b of the electrode connecting portion 613 is disposed at a position overlapping in the thickness direction Z with the first control electrode 32 of the first switching element 30c that is closest to the first control lead 21. The second end 613b of the electrode connecting portion 613 is connected to the first control electrode 32 of the first switching element 30c by solder.

[0122] When viewed from the thickness direction Z, the electrode connection portion 613 overlaps with the first control electrode 32 of the central first switching element 30b of the three first switching elements 30a, 30b, and 30c at a central portion thereof. The electrode connection portion 613 is connected to the first control electrode 32 of the first switching element 30b by soldering. The first control connection member 61 is made of Cu. The thickness of the first control connection member 61 is 0.05 mm or more and 1.0 mm or less, and preferably 0.5 mm or more.

[0123] The second control connection member 67 connects the second control electrodes 42 of the second switching elements 40a, 40b, and 40c to the second control lead 27. The second control connection member 67 is a conductive plate-shaped member. The second control connection member 67 has a lead connection portion 671, a coupling portion 672, and an electrode connection portion 673.

[0124] The lead connection portion 671 is formed in a linear shape. The lead connection portion 671 is arranged to extend along the vertical direction Y in which the second switching elements 40a, 40b, and 40c are arranged. The lead connection portion 671 is arranged on the side of the second control electrode 42 of each of the second switching elements 40a, 40b, and 40c. In this embodiment, the lead connection portion 671 is arranged so as not to overlap with each of the second switching elements 40a, 40b, and 40c when viewed from the thickness direction Z. In other words, the lead connection portion 671 in this embodiment is arranged between the fourth side surface 126 of the second die pad 12 and the second switching elements 40a, 40b, and 40c when viewed from the thickness direction Z.

[0125] The lead connection portion 671 has a first end 671a and a second end 671b. The first end 671a is connected to the pad portion 271 of the second control lead 27. Therefore, the second end 671b is located on the opposite side from the second control lead 27 in the vertical direction Y. In this embodiment, the second end 671b of the lead connection portion 671 is located in the same position as the second control electrode 42 of the second switching element 40a that is located farthest from the second control lead 27 among the multiple second switching elements 40a, 40b, and 40c in the vertical direction Y in which the multiple second switching elements 40a, 40b, and 40c are arranged. In other words, the second end 671b of the lead connection portion 671 is located so as to overlap the second control electrode 42 of the second switching element 40a that is located farthest from the second control lead 27 when viewed from the horizontal direction X.

[0126] A coupling portion 672 is connected to the second end portion 671b of the lead connecting portion 671. The coupling portion 672 is formed to extend in the lateral direction X from the second end portion 671b of the lead connecting portion 671. In the present embodiment, the coupling portion 672 extends from the lead connecting portion 671 toward the second control electrode 42 of the second switching element 40a.

[0127] The electrode connection portion 673 is connected to the tip of the coupling portion 672. The electrode connection portion 673 is linear and extends in the vertical direction Y. The electrode connection portion 673 is arranged parallel to the lead connection portion 671. The electrode connection portion 673 is also arranged on the same line on which the second control electrodes 42 of the second switching elements 40a, 40b, and 40c are arranged. When viewed from the thickness direction Z, the electrode connection portion 673 overlaps with the second control electrodes 42 of the second switching elements 40a, 40b, and 40c.

[0128] The electrode connecting portion 673 has a first end 673a and a second end 673b. The first end 673a of the electrode connecting portion 673 is connected to the tip of the linking portion 672. The first end 673a of the electrode connecting portion 673 is disposed at a position overlapping the second control electrode 42 of the second switching element 40a in the thickness direction Z. The first end 673a of the electrode connecting portion 673 is connected to the second control electrode 42 of the second switching element 40a by solder.

[0129] The second end 673b of the electrode connecting portion 673 is disposed at a position overlapping in the thickness direction Z with the second control electrode 42 of the second switching element 40c that is closest to the second control lead 27. The second end 673b of the electrode connecting portion 673 is connected to the second control electrode 42 of the second switching element 40c by solder.

[0130] When viewed from the thickness direction Z, the electrode connection portion 673 overlaps with the second control electrode 42 of the central second switching element 40b of the three second switching elements 40a, 40b, and 40c at a central portion thereof. The electrode connection portion 673 is connected to the second control electrode 42 of the second switching element 40b by soldering. The second control connection member 67 is made of Cu. The thickness of the second control connection member 67 is 0.05 mm or more and 1.0 mm or less, and preferably 0.5 mm or more.

[0131] The semiconductor device A40 has a first source connecting member 62 and a second source connecting member 66. The first source connecting member 62 of this embodiment connects the source electrode 312 of the first switching element 30c, which is closest to the first source lead 22 among the three first switching elements 30a, 30b, and 30c, to the first source lead 22. The first source connecting member 62 has a lead connecting portion extending from the first source lead 22 in the vertical direction Y and an electrode connecting portion extending from the tip of the lead connecting portion in the horizontal direction X and connected to the source electrode 312 of the first switching element 30c. The first source connecting member 62 is connected to the first source lead 22 by solder and is also connected to the first source electrode 312 of the first switching element 30c by solder. The first source connecting member 62 is made of Cu. The thickness of the first source connecting member 62 is 0.05 mm or more and 1.0 mm or less, and preferably 0.5 mm or more.

[0132] The second source connecting member 66 of this embodiment connects the source electrode 412 of the second switching element 40c, which is closest to the second source lead 26 among the three second switching elements 40a, 40b, and 40c, to the second source lead 26. The second source connecting member 66 has a lead connecting portion extending from the second source lead 26 in the vertical direction Y and an electrode connecting portion extending from the tip of the lead connecting portion in the horizontal direction X and connected to the source electrode 412 of the second switching element 40c. The second source connecting member 66 is connected to the second source lead 26 by solder and to the second source electrode 412 of the second switching element 40c by solder. The second source connecting member 66 is made of Cu. The thickness of the second source connecting member 66 is 0.05 mm or more and 1.0 mm or less, and preferably 0.5 mm or more.

[0133] As shown in FIG. 15, the semiconductor device A40 includes a first drive connection member 53 and a second drive connection member . The first drive connection member 53 is a strip-shaped plate member extending in the arrangement direction (vertical direction Y) of the first switching elements 30a, 30b, and 30c. The first drive connection member 53 connects the main surface drive electrodes 31 (main source electrodes 311) of the first switching elements 30a, 30b, and 30c to the pad portions 251b of the output leads 25. Therefore, the first main surface drive electrodes 31 of the first switching elements 30a, 30b, and 30c are connected to the second die pad 12 via the first drive connection member 53 and the pad portions 251b of the output leads 25. The first drive connection member 53 is made of Cu. The thickness of the first drive connection member 53 is 0.05 mm or more and 1.0 mm or less, and preferably 0.5 mm or more.

[0134] The second drive connection member 54 is a strip-shaped plate member extending in the arrangement direction (vertical direction Y) of the second switching elements 40a, 40b, and 40c. The second drive connection member 54 connects the second principal surface drive electrodes 41 (main source electrodes 411) of the second switching elements 40a, 40b, and 40c to the pad portions 241 of the second drive leads 24. The second drive connection member 54 is made of Cu. The thickness of the second drive connection member 54 is 0.05 mm or more and 1.0 mm or less, and is preferably 0.5 mm or more.

[0135] (action) Next, the operation of the semiconductor device A40 of this embodiment will be described. 15, the semiconductor device A40 includes three first switching elements 30a, 30b, and 30c mounted on a first die pad 11. The first switching elements 30a, 30b, and 30c are arranged such that their first control electrodes 32 are aligned in a straight line. The semiconductor device A40 also includes a first control connection member 61 that connects the first control electrodes 32 of the first switching elements 30a, 30b, and 30c to the first control lead 21. The first control connection member 61 has a lead connection portion 611 and an electrode connection portion 613 that extend adjacent to each other and parallel to each other, and a coupling portion 612 that connects a second end 611b of the lead connection portion 611 to a first end 613a of the electrode connection portion 613.

[0136] When the three first switching elements 30a, 30b, and 30c are driven, a current for the gate voltage flows between the first control lead 21 and the first control electrodes 32 of the first switching elements 30a, 30b, and 30c via the first control connection member 61. For example, when a current flows from the first control connection member 61 to the first control electrode 32, currents I1 and I2 flow in opposite directions through the lead connection portion 611 and the electrode connection portion 613. The mutual inductance is reduced by magnetic flux generated by the currents I1 and I2 flowing through the adjacent, parallel lead connection portions 611 and the electrode connection portion 613, thereby reducing the parasitic inductance in the first control connection member 61. As a result, the variation in the parasitic inductance between the first control lead 21 and the first switching elements 30a, 30b, and 30c is reduced compared to when the first control electrodes 32 of the first switching elements 30a, 30b, and 30c are individually connected to the first control lead 21 by wires.

[0137] As shown in FIG. 14, the semiconductor device A40 includes three second switching elements 40a, 40b, and 40c mounted on the second die pad 12. The second switching elements 40a, 40b, and 40c are arranged such that their second control electrodes 42 are aligned in a straight line. The semiconductor device A40 also includes a second control connection member 67 that connects the second control electrodes 42 of the second switching elements 40a, 40b, and 40c to the second control lead 27. The second control connection member 67 includes a lead connection portion 671 and an electrode connection portion 673 that extend parallel to each other and are adjacent to each other, and a linking portion 672 that connects the lead connection portion 671 and the electrode connection portion 673 to each other at their ends. In other words, the second control connection member 67 is configured similarly to the first control connection member 61. Therefore, similar to the first control connection member 61, the second control connection member 67 also reduces variations in parasitic inductance between the second control lead 27 and the second control electrodes 42 of the second switching elements 40a, 40b, 40c.

[0138] As described above, the semiconductor device A40 of the fourth embodiment has the following advantages. (4-1) The semiconductor device A40 includes first switching elements 30a, 30b, and 30c, each having its first control electrode 32 aligned in a straight line, and a first control connection member 61 that connects the first control electrodes 32 of the first switching elements 30a, 30b, and 30c to the first control lead 21. The first control connection member 61 has a lead connection portion 611 and an electrode connection portion 613 that extend parallel to each other and are adjacent to each other, and a linking portion 612 that connects the lead connection portion 611 and the electrode connection portion 613 to each other at their ends. Variation in parasitic inductance between the first control lead 21 and the first switching elements 30a, 30b, and 30c is reduced compared to when the first control electrodes 32 of the first switching elements 30a, 30b, and 30c are individually connected to the first control lead 21 by wire.

[0139] (4-2) The semiconductor device A40 includes second switching elements 40a, 40b, and 40c whose second control electrodes 42 are arranged in a straight line, and a second control connection member 67 that connects the second control electrodes 42 of the second switching elements 40a, 40b, and 40c to the second control lead 27. The second control connection member 67 has a lead connection portion 671 and an electrode connection portion 673 that extend adjacent to each other and parallel to each other, and a linking portion 672 that connects the lead connection portion 671 and the electrode connection portion 673 to each other at their ends. Variation in parasitic inductance between the second control lead 27 and the second switching elements 40a, 40b, and 40c is reduced compared to when the second control electrodes 42 of the second switching elements 40a, 40b, and 40c are individually connected to the second control lead 27 by wires.

[0140] (Fifth embodiment) A semiconductor device A50 of the fifth embodiment will be described with reference to FIGS. The semiconductor device A50 of the fifth embodiment differs from the semiconductor device A40 of the fourth embodiment described above mainly in the configuration of the control connection member. In the following description, components similar to those of the semiconductor device A30 of the third embodiment and the semiconductor device A40 of the fourth embodiment are denoted by the same reference numerals, and some or all of the description thereof will be omitted.

[0141] 17, the semiconductor device A50 of the fifth embodiment includes three first switching elements 30a, 30b, and 30c mounted on the first die pad 11 and three second switching elements 40a, 40b, and 40c mounted on the second die pad 12. The first switching elements 30a, 30b, and 30c are arranged in the vertical direction Y. When distinguishing between the first switching elements 30a, 30b, and 30c, the centrally located first switching element 30b will be referred to as the first element 30b, and the first switching elements 30a and 30c located on either side of the first element 30b will be referred to as the second element 30a and the third element 30c, respectively. The second switching elements 40a, 40b, and 40c are arranged in the vertical direction Y. When distinguishing between the second switching elements 40a, 40b, and 40c, the second switching element 40b located in the center will be referred to as the fourth element 40b, and the second switching elements 40a and 40c on either side of the fourth element 40b will be referred to as the fifth element 40a and the sixth element 40c.

[0142] As shown in FIGS. 17 and 18, the semiconductor device A50 of the fifth embodiment includes a first control connection member 71 and a second control connection member 75. The first control connection member 71 has a first lead connection portion 711 and a first electrode connection portion 712 .

[0143] The first lead connection portion 711 has a first end portion 711a and a second end portion 711b. The first end portion 711a is connected to the pad portion 211 of the first control lead 21. The first lead connection portion 711 has a first connection portion 711c extending in the vertical direction Y and a second connection portion 711d extending in the horizontal direction X from the tip of the first connection portion 711c. The first lead connection portion 711 is arranged so as not to overlap with the first switching elements 30a, 30b, and 30c when viewed from the thickness direction Z. That is, in this embodiment, the first connection portion 711c is arranged between the third side surface 115 of the first die pad 11 and the first switching elements 30a, 30b, and 30c when viewed from the thickness direction Z. The second connection portion 711d is arranged in the same position as the first control electrode 32 of the first element 30b in the vertical direction Y.

[0144] The first electrode connection portion 712 has a first branch portion 721 , a second branch portion 722 , a first connection portion 731 , a second connection portion 732 , a third connection portion 733 , and a fourth connection portion 734 . The first branch portion 721 and the second branch portion 722 are connected to the tip of the second connection portion 711d, i.e., the second end portion 711b of the first lead connection portion 711. In this embodiment, the first branch portion 721 and the second branch portion 722 are formed to extend in opposite directions from each other along the vertical direction from the second end portion 711b of the first lead connection portion 711 and to extend in the horizontal direction X at a predetermined position. In other words, the first branch portion 721 includes a first portion 721b that extends from the second end portion 711b of the first lead connection portion 711 along the vertical direction Y toward the first side surface 113 of the first die pad 11, and a second portion 721c that extends in the horizontal direction X from the tip of the first portion 721b. The second branch portion 722 includes a first portion 722b extending from the second end portion 711b of the first lead connection portion 711 in the opposite direction to the first branch portion 721, i.e., toward the second side surface 114 of the first die pad 11, and a second portion 722c extending from a tip of the first portion 721b in the lateral direction X. As shown in FIG. 18 , the tip portion 721a of the first branch portion 721 and the tip portion 722a of the second branch portion 722 are located on a line connecting the first control electrodes 32 of the first switching elements 30a, 30b, and 30c when viewed from the thickness direction Z. The length of the first branch portion 721 is the length from the second end portion 711b of the first lead connection portion 711 to the tip portion 721a of the first branch portion 721. The length of the second branch portion 722 is the length from the second end portion 711b of the first lead connection portion 711 to the tip portion 722a of the second branch portion 722.

[0145] The first connection portion 731 is connected between the tip 721a of the first branch portion 721 and the first control electrode 32 of the first element 30b. The first connection portion 731 is disposed adjacent to and parallel to the first branch portion 721 (first portion 721b). The length of the first connection portion 731 is the length from the tip 721a of the first branch portion 721 to the first control electrode 32 of the first element 30b.

[0146] The second connection portion 732 is connected between the tip 722a of the second branch portion 722 and the first control electrode 32 of the first element 30b. The second connection portion 732 is disposed adjacent to and parallel to the second branch portion 722 (first portion 722b). The length of the first connection portion 731 is the length from the tip 722a of the second branch portion 722 to the first control electrode 32 of the first element 30b.

[0147] The first branch 721 and the first connection portion 731 are connected in series between the second end 711b of the first lead connection portion 711 and the first control electrode 32 of the first element 30b. The second branch 722 and the second connection portion 732 are connected in series between the second end 711b of the first lead connection portion 711 and the first control electrode 32 of the first element 30b. Therefore, the first control electrode of the first element 30b is connected to the second end 711b of the first lead connection portion 711 via the first connection portion 731 and the first branch 721, and is also connected to the second end 711b of the first lead connection portion 711 via the second connection portion 732 and the second branch 722. In other words, the first control electrode 32 of the first element 30b is connected to the second end 711b of the first lead connection portion 711 via the first connection portion 731 and the first branch portion 721, which are connected in series, and the second connection portion 732 and the second branch portion 722, which are connected in series. That is, the first connection portion 731 and the first branch portion 721, and the second connection portion 732 and the second branch portion 722 are connected in parallel with each other.

[0148] The third connection portion 733 is connected between the tip 721a of the first branch 721 and the first control electrode 32 of the second element 30a. In other words, the first control electrode 32 of the second element 30a is connected to the second end 711b of the first lead connection portion 711 via the third connection portion 733 and the first branch 721. The length of the third connection portion 733 is the length from the tip 721a of the first branch 721 to the first control electrode 32 of the second element 30a.

[0149] The fourth connection portion 734 is connected between the tip 722a of the second branch portion 722 and the first control electrode 32 of the third element 30c. In other words, the first control electrode 32 of the third element 30c is connected to the second end 711b of the first lead connection portion 711 via the fourth connection portion 734 and the second branch portion 722. The length of the fourth connection portion 734 is the length from the tip 722a of the second branch portion 722 to the first control electrode 32 of the third element 30c.

[0150] The first branch portion 721, the second branch portion 722, the first connection portion 731, the second connection portion 732, the third connection portion 733, and the fourth connection portion 734 that constitute the first electrode connection portion 712 have the same width. The first branch portion 721 and the second branch portion 722 have the same length. The first connection portion 731 and the second connection portion 732 have the same length. The third connection portion 733 and the fourth connection portion 734 have the same length. The first connection portion 731 and the first portion 721b of the first branch portion 721 are adjacent to each other and parallel to each other, and the length of the first connection portion 731 is the same as the length of the first portion 721b of the first branch portion 721. The second connection portion 732 and the first portion 722b of the second branch portion 722 are adjacent to each other and parallel to each other, and the length of the second connection portion 732 is the same as the length of the first portion 722b of the second branch portion 722.

[0151] The second control connection member 75 has a second lead connection portion 751 and a second electrode connection portion 752 . The second lead connection portion 751 has a first end portion 751a and a second end portion 751b. The first end portion 751a is connected to the pad portion 271 of the second control lead 27.

[0152] The second lead connection portion 751 has a first connection portion 751c extending in the vertical direction Y and a second connection portion 751d extending in the horizontal direction X from the tip of the first connection portion 751c. The second lead connection portion 751 is arranged so as not to overlap with the first switching elements 30a, 30b, and 30c when viewed from the thickness direction Z. That is, the first connection portion 751c in this embodiment is arranged between the fourth side surface 126 of the second die pad 12 and the first switching elements 30a, 30b, and 30c when viewed from the thickness direction Z. The second connection portion 751d is arranged in the same position as the second control electrode 42 of the fourth element 40b in the vertical direction Y.

[0153] The second electrode connection portion 752 has a third branch portion 761 , a fourth branch portion 762 , a fifth connection portion 771 , a sixth connection portion 772 , a seventh connection portion 773 , and an eighth connection portion 774 . The third branch portion 761 and the fourth branch portion 762 are connected to the tip of the second lead connection portion 751, i.e., the second end portion 751b of the second lead connection portion 751. In this embodiment, the third branch portion 761 and the fourth branch portion 762 are formed to extend in opposite directions from each other along the vertical direction from the second end portion 751b of the second lead connection portion 751 and to extend in the horizontal direction X at a predetermined position. In other words, the third branch portion 761 includes a first portion 761b that extends from the second end portion 751b of the second lead connection portion 751 along the vertical direction Y toward the first side surface 123 of the second die pad 12, and a second portion 761c that extends in the horizontal direction X from the tip of the first portion 761b. The fourth branch portion 762 includes a first portion 762b extending from the second end portion 751b of the second lead connection portion 751 in the opposite direction to the third branch portion 761, i.e., toward the second side surface 124 of the second die pad 12, and a second portion 762c extending from the tip of the first portion 761b in the lateral direction X. As shown in FIG. 18 , the tip 761a of the third branch portion 761 and the tip 762a of the fourth branch portion 762 are located on a line connecting the second control electrodes 42 of the first switching elements 30a, 30b, and 30c when viewed from the thickness direction Z. The length of the third branch portion 761 is the length from the second end portion 751b of the second lead connection portion 751 to the tip 761a of the third branch portion 761. The length of the fourth branch portion 762 is the length from the second end portion 751b of the second lead connection portion 751 to the tip 762a of the fourth branch portion 762.

[0154] Fifth connection portion 771 is connected between tip 761a of third branch portion 761 and second control electrode 42 of fourth element 40b. Fifth connection portion 771 is disposed adjacent to and parallel to third branch portion 761 (first portion 761b). The length of fifth connection portion 771 is the length from tip 761a of third branch portion 761 to second control electrode 42 of fourth element 40b.

[0155] The sixth connection portion 772 is connected between the tip 762a of the fourth branch portion 762 and the second control electrode 42 of the fourth element 40b. The sixth connection portion 772 is disposed adjacent to and parallel to the fourth branch portion 762 (first portion 762b). The length of the sixth connection portion 772 is the length from the tip 762a of the fourth branch portion 762 to the second control electrode 42 of the fourth element 40b.

[0156] The third branch 761 and the fifth connection portion 771 are connected in series between the second end 751b of the second lead connection portion 751 and the second control electrode 42 of the fourth element 40b. The fourth branch 762 and the sixth connection portion 772 are connected in series between the second end 751b of the second lead connection portion 751 and the second control electrode 42 of the fourth element 40b. Therefore, the second control electrode of the fourth element 40b is connected to the second end 751b of the second lead connection portion 751 via the fifth connection portion 771 and the third branch 761, and is also connected to the second end 751b of the second lead connection portion 751 via the sixth connection portion 772 and the fourth branch 762. In other words, the second control electrode 42 of the fourth element 40b is connected to the second end 751b of the second lead connection portion 751 via the fifth connection portion 771 and the third branch portion 761, which are connected in series, and the fifth connection portion 771 and the fourth branch portion 762, which are connected in series. That is, the fifth connection portion 771 and the third branch portion 761, and the sixth connection portion 772 and the fourth branch portion 762 are connected in parallel to each other.

[0157] The seventh connection portion 773 is connected between the tip 761a of the third branch 761 and the second control electrode 42 of the fifth element 40a. In other words, the second control electrode 42 of the fifth element 40a is connected to the second end 751b of the second lead connection portion 751 via the seventh connection portion 773 and the third branch 761. The length of the seventh connection portion 773 is the length from the tip 761a of the third branch 761 to the second control electrode 42 of the fifth element 40a.

[0158] The eighth connection portion 774 is connected between the tip 762a of the fourth branch 762 and the second control electrode 42 of the sixth element 40c. In other words, the second control electrode 42 of the sixth element 40c is connected to the second end 751b of the second lead connection portion 751 via the eighth connection portion 774 and the fourth branch 762. The length of the eighth connection portion 774 is the length from the tip 762a of the fourth branch 762 to the second control electrode 42 of the sixth element 40c.

[0159] The third branch portion 761, the fourth branch portion 762, the fifth connection portion 771, the sixth connection portion 772, the seventh connection portion 773, and the eighth connection portion 774 that constitute the second electrode connection portion 752 have the same width. The third branch portion 761 and the fourth branch portion 762 have the same length. The fifth connection portion 771 and the sixth connection portion 772 have the same length. The seventh connection portion 773 and the eighth connection portion 774 have the same length. The fifth connection portion 771 and the first portion 761b of the third branch portion 761 are adjacent to each other and parallel to each other, and the length of the fifth connection portion 771 is the same as the length of the first portion 761b of the third branch portion 761. The sixth connection portion 772 and the first portion 762b of the fourth branch portion 762 are adjacent to each other and parallel to each other, and the length of the sixth connection portion 772 is the same as the length of the first portion 762b of the fourth branch portion 762.

[0160] (action) Next, the operation of the semiconductor device A50 of this embodiment will be described. 18, the first control connection member 71 has a first lead connection portion 711 and a first electrode connection portion 712. The first electrode connection portion 712 has a first branch portion 721, a second branch portion 722, a first connection portion 731, a second connection portion 732, a third connection portion 733, and a fourth connection portion 734.

[0161] The first control electrode 32 of the first element 30b is connected to the second end 711b of the first lead connection portion 711 via a first connection portion 731 and a first branch portion 721 connected in series and a second connection portion 732 and a second branch portion 722 connected in series. The first connection portion 731 and the first branch portion 721, and the second connection portion 732 and the second branch portion 722 are connected in parallel to each other. Therefore, the resistance value between the first control electrode 32 of the first element 30b and the second end 711b of the first lead connection portion 711 is a resistance value obtained by combining the resistance values ​​of the first branch portion 721, the second branch portion 722, the first connection portion 731, and the second connection portion 732. The resistance values ​​of the first connection portion 731 and the second connection portion 732 are the same, and the resistance values ​​of the first branch portion 721 and the second branch portion 722 are the same. The resistance values ​​of the first connecting portion 731 and the first branch portion 721 are the same, and the resistance values ​​of the second connecting portion 732 and the second branch portion 722 are the same. In this embodiment, the first branch portion 721 is longer than the first connecting portion 731 due to the portion extending in the horizontal direction X. Therefore, the resistance value between the first control electrode 32 of the first element 30b and the second end 711b of the first lead connecting portion 711 is greater than the resistance value of the first connecting portion 731 and smaller than the resistance value of the first branch portion 721.

[0162] The first control electrode 32 of the second element 30a is connected to the second end 711b of the first lead connection portion 711 via the third connection portion 733 and the first branch portion 721. Therefore, the difference between the resistance value between the first control electrode 32 of the second element 30a and the second end 711b of the first lead connection portion 711 and the resistance value between the first control electrode 32 of the first element 30b and the second end 711b of the first lead connection portion 711 is smaller than the resistance value of the third connection portion 733.

[0163] The first control electrode 32 of the third element 30c is connected to the second end 711b of the first lead connection portion 711 via the fourth connection portion 734 and the second branch portion 722. Therefore, the difference between the resistance value between the first control electrode 32 of the third element 30c and the second end 711b of the first lead connection portion 711 and the resistance value between the first control electrode 32 of the first element 30b and the second end 711b of the first lead connection portion 711 is smaller than the resistance value of the fourth connection portion 734.

[0164] The tip 721a of the first branch 721 and the tip 722a of the second branch 722 are located on a straight line connecting the first control electrodes 32 of the first element 30b, the second element 30a, and the third element 30c. The first connection portion 731 and the third connection portion 733 extend in opposite directions from the tip 721a of the first branch 721. The second connection portion 732 and the fourth connection portion 734 extend in opposite directions from the tip 722a of the second branch 722. Therefore, the length of the third connection portion 733 is shorter than the arrangement pitch between the first element 30b and the second element 30a, and the length of the fourth connection portion 734 is shorter than the arrangement pitch between the first element 30b and the third element 30c. This allows the resistance values ​​for the second element 30a and the third element 30c to approach the resistance value for the first element 30b, thereby reducing variations in the resistance values ​​among the first element 30b, the second element 30a, and the third element 30c. By reducing the ratio of the length of the third connection portion 733 to the length of the first connection portion 731 (for example, 9:1), the resistance value for the second element 30a can be made equal to the resistance value for the first element 30b. By reducing the ratio of the length of the fourth connection portion 734 to the length of the second connection portion 732 (for example, 9:1), the resistance value for the third element 30c can be made equal to the resistance value for the first element 30b.

[0165] The second control connection member 75 is configured similarly to the first control connection member 71. More specifically, the first control electrode 32 of the fourth element 40b is connected to the second end 751b of the second lead connection portion 751 via a fifth connection portion 771 and a third branch portion 761 connected in series, and a sixth connection portion 772 and a fourth branch portion 762 connected in series. Therefore, the resistance value between the first control electrode 32 of the fourth element 40b and the second end 751b of the second lead connection portion 751 is greater than the resistance value of the fifth connection portion 771 and less than the resistance value of the third branch portion 761.

[0166] The first control electrode 32 of the fifth element 40a is connected to the second end 751b of the second lead connection portion 751 via the seventh connection portion 773 and the third branch portion 761. Therefore, the difference between the resistance value between the first control electrode 32 of the fifth element 40a and the second end 751b of the second lead connection portion 751 and the resistance value between the first control electrode 32 of the fourth element 40b and the second end 751b of the second lead connection portion 751 is smaller than the resistance value of the seventh connection portion 773.

[0167] The first control electrode 32 of the sixth element 40c is connected to the second end 751b of the second lead connection portion 751 via the eighth connection portion 774 and the fourth branch portion 762. Therefore, the difference between the resistance value between the first control electrode 32 of the sixth element 40c and the second end 751b of the second lead connection portion 751 and the resistance value between the first control electrode 32 of the fourth element 40b and the second end 751b of the second lead connection portion 751 is smaller than the resistance value of the eighth connection portion 774.

[0168] In this way, it is possible to reduce variations in the resistance values ​​of the fourth element 40b, the fifth element 40a, and the sixth element 40c. As described above, the semiconductor device A50 of the fifth embodiment has the following advantages.

[0169] (5-1) The first control connection member 71 connects the first control electrodes 32 of the three elements, the first element 30b, the second element 30a, and the third element 30c, mounted on the first die pad 11, to the first control lead 21. The first control connection member 71 has a first lead connection portion 711 connected to the first control lead 21, and a first electrode connection portion 712 between the first lead connection portion 711 and the first control electrodes 32 of the three elements, the first element 30b, the second element 30a, and the third element 30c.

[0170] The first electrode connection portion 712 has a first branch portion 721, a second branch portion 722, a first connection portion 731, a second connection portion 732, a third connection portion 733, and a fourth connection portion 734. The first branch portion 721 and the second branch portion 722 are connected to the second end portion 711b of the first lead connection portion 711. The first connection portion 731 is connected between the first branch portion 721 and the first element 30b, and the second connection portion 732 is connected between the second branch portion 722 and the first element 30b. The third connection portion 733 is connected between the first branch portion 721 and the second element 30a, and the fourth connection portion 734 is connected between the second branch portion 722 and the third element 30c. This first control connection member 71 can reduce variations in resistance values ​​for the first element 30b, the second element 30a, and the third element 30c.

[0171] (5-2) The second control connection member 75 connects the first control electrodes 32 of the three elements, the fourth element 40b, the fifth element 40a, and the sixth element 40c, mounted on the second die pad 12, to the second control lead 27. The second control connection member 75 has a second lead connection portion 751 connected to the second control lead 27, and a second electrode connection portion 752 between the second lead connection portion 751 and the first control electrodes 32 of the three elements, the fourth element 40b, the fifth element 40a, and the sixth element 40c.

[0172] The second electrode connection portion 752 has a third branch portion 761, a fourth branch portion 762, a fifth connection portion 771, a sixth connection portion 772, and a seventh connection portion 773. The third branch portion 761 and the fourth branch portion 762 are connected to the second end portion 751b of the second lead connection portion 751. The fifth connection portion 771 is connected between the third branch portion 761 and the fourth element 40b, and the sixth connection portion 772 is connected between the fourth branch portion 762 and the fourth element 40b. The seventh connection portion 773 is connected between the third branch portion 761 and the fifth element 40a, and the eighth connection portion 774 is connected between the fourth branch portion 762 and the sixth element 40c. This second control connection member 75 can reduce variations in resistance values ​​for the fourth element 40b, the fifth element 40a, and the sixth element 40c.

[0173] (Sixth embodiment) A semiconductor device A60 according to the sixth embodiment will be described with reference to FIGS. The semiconductor device A60 differs from the semiconductor device A40 of the fourth embodiment and the semiconductor device A50 of the fifth embodiment described above mainly in the configuration of the control connection member. In the following description, components similar to those of the semiconductor device A30 of the third embodiment, the semiconductor device A40 of the fourth embodiment, and the semiconductor device A50 of the fifth embodiment are designated by the same reference numerals, and some or all of the description thereof will be omitted.

[0174] 19, a semiconductor device A60 of the sixth embodiment includes a first control connection member 71a and a second control connection member 75a. The first control electrodes 32 of the first switching elements 30a, 30b, and 30c are connected to the first control lead 21 by the first control connection member 71a. The second control electrodes 42 of the second switching elements 40a, 40b, and 40c are connected to the second control lead 27 by the second control connection member 75a.

[0175] The first control connection member 71a has a first lead connection portion 711, and electrode connection portions 742, 741, and 743 that extend from the first lead connection portion 711 toward the control electrodes of the first switching elements 30a, 30b, and 30c.

[0176] The electrode connection portion 741 extends in the horizontal direction X from the second end portion 711b of the first lead connection portion 711 toward the first control electrode 32 of the first element 30b. The length of the electrode connection portion 741 is the length from the second end portion 711b of the first lead connection portion 711 to the first control electrode 32 of the first element 30b.

[0177] The electrode connection portion 742 extends from the second end 711b of the first lead connection portion 711 toward the first control electrode 32 of the second element 30a. The electrode connection portion 742 has a first connection portion 742a extending in the vertical direction Y, and a second connection portion 742b extending from the tip of the first connection portion 742a in the horizontal direction X and connected to the first control electrode 32 of the second element 30a. The length of the electrode connection portion 742 is the length from the second end 711b of the first lead connection portion 711 to the first control electrode 32 of the second element 30a.

[0178] The electrode connection portion 743 extends from the second end 711b of the first lead connection portion 711 toward the first control electrode 32 of the third element 30c. The electrode connection portion 743 has a first connection portion 743a extending in the vertical direction Y, and a second connection portion 743b extending from the tip of the first connection portion 743a in the horizontal direction X and connected to the first control electrode 32 of the third element 30c. The length of the electrode connection portion 743 is the length from the second end 711b of the first lead connection portion 711 to the first control electrode 32 of the third element 30c.

[0179] The first connection portion 742a of the electrode connection portion 742 and the first connection portion 743a of the electrode connection portion 743 extend in opposite directions along the vertical direction Y in which the first switching elements 30a, 30b, and 30c are arranged. The electrode connection portion 742 and the electrode connection portion 743 have the same width. The electrode connection portions 741 to 743 each have the same thickness. The electrode connection portions 742 and 743 are longer and wider than the electrode connection portion 741. In this embodiment, the widths of the electrode connection portions 741 to 743 are set according to the lengths of the electrode connection portions 741 to 743 so that the resistance values ​​of the electrode connection portion 741 and the electrode connection portions 742 and 743 are the same. For example, the widths of the electrode connection portions 741 to 743 are set inversely proportional to the lengths of the electrode connection portions 741 to 743. The thickness of the electrode connection portions 741 to 743 may be changed in addition to the width.

[0180] The second control connection member 75a has a second lead connection portion 751, and electrode connection portions 782, 781, and 783 that extend from the second lead connection portion 751 toward the control electrodes of the second switching elements 40a, 40b, and 40c.

[0181] The electrode connection portion 781 extends in the horizontal direction X from the second end portion 751b of the second lead connection portion 751 toward the second control electrode 42 of the fourth element 40b. The length of the electrode connection portion 781 is the length from the second end portion 751b of the second lead connection portion 751 to the second control electrode 42 of the fourth element 40b.

[0182] The electrode connection portion 782 extends from the second end portion 751b of the second lead connection portion 751 toward the second control electrode 42 of the fifth element 40a. The electrode connection portion 782 has a first connection portion 782a extending in the vertical direction Y, and a second connection portion 782b extending from the tip of the first connection portion 782a in the horizontal direction X and connected to the second control electrode 42 of the fifth element 40a. The length of the electrode connection portion 782 is the length from the second end portion 751b of the second lead connection portion 751 to the second control electrode 42 of the fifth element 40a.

[0183] The electrode connection portion 783 extends from the second end 751b of the second lead connection portion 751 toward the second control electrode 42 of the sixth element 40c. The electrode connection portion 783 has a first connection portion 783a extending in the vertical direction Y, and a second connection portion 783b extending from the tip of the first connection portion 783a in the horizontal direction X and connected to the second control electrode 42 of the sixth element 40c. The length of the electrode connection portion 783 is the length from the second end 751b of the second lead connection portion 751 to the second control electrode 42 of the sixth element 40c.

[0184] The first connection portion 782a of the electrode connection portion 782 and the first connection portion 783a of the electrode connection portion 783 extend in opposite directions along the vertical direction Y in which the second switching elements 40a, 40b, and 40c are arranged. The electrode connection portion 782 and the electrode connection portion 783 have the same width. The electrode connection portions 781 to 783 each have the same thickness. The electrode connection portions 782 and 783 are longer and wider than the electrode connection portion 781. In this embodiment, the widths of the electrode connection portions 781 to 783 are set according to the lengths of the electrode connection portions 781 to 783 so that the resistance values ​​of the electrode connection portion 781 and the electrode connection portions 782 and 783 are the same. For example, the widths of the electrode connection portions 781 to 783 are set inversely proportional to the lengths of the electrode connection portions 781 to 783. The thickness of the electrode connection portions 781 to 783 may be changed in addition to the width.

[0185] (effect) As described above, this embodiment provides the following advantages. (6-1) By setting the width of the electrode connection parts 742, 741, 743 connected to the first control electrodes 32 of the first switching elements 30a, 30b, 30c so that the resistance values ​​are the same, it is possible to reduce the variation in the electrical characteristics from the first control lead 21 to the first control electrodes 32 of the first switching elements 30a, 30b, 30c.

[0186] (6-2) By setting the width of the electrode connection parts 782, 781, 783 connected to the second control electrodes 42 of the second switching elements 40a, 40b, 40c so that the resistance values ​​are the same, it is possible to reduce the variation in the electrical characteristics from the first control lead 21 to the first control electrodes 32 of the second switching elements 40a, 40b, 40c.

[0187] (Example of change) The above-described embodiments and modifications can be implemented with the following modifications: The above-described embodiments and modifications can be implemented in combination with each other within the scope of technical compatibility.

[0188] The second to sixth embodiments described above are semiconductor devices in which leads protrude from the first resin side surface 903 and the second resin side surface 904 of the sealing resin 90. However, in a semiconductor device in which all leads protrude from the first resin side surface 903 of the sealing resin 90, as in the first embodiment, three or more switching elements may be provided on the die pad.

[0189] In each of the above embodiments, the shape, width, and thickness of each lead can be changed as appropriate. For example, the thickness of certain leads or all leads may be the same as the thickness of the die pads 11, 12.

[0190] Seventh to Ninth Embodiments Semiconductor devices including semiconductor elements with switching functions are widely used, for example, in power supply devices for driving motors. Japanese Patent Application Laid-Open Publication No. 2007-234690 discloses an example of a conventional semiconductor device. The semiconductor device disclosed in this document is configured as a half-bridge circuit having an upper arm and a lower arm. Each of the upper arm and the lower arm is composed of a plurality of semiconductor elements connected in parallel with each other.

[0191] When a control voltage is applied to control electrodes (for example, gate electrodes) of a plurality of semiconductor elements, there is a concern that the control voltage may be applied non-uniformly due to the conduction paths to the respective control electrodes.

[0192] The seventh to ninth embodiments provide a semiconductor device that can apply a control voltage more uniformly to a plurality of semiconductor elements. Seventh Embodiment 21 to 51 show a semiconductor device according to a seventh embodiment of the present disclosure. The semiconductor device A1 of this embodiment includes a plurality of leads 1A to 1G, a plurality of semiconductor elements 21A, 22A, 23A, 21B, 22B, and 23B, a plurality of first conductive members 3A and 3B, a plurality of second conductive members 4A and 4B, a third conductive member 5, a fourth conductive member 6, and a sealing resin 7. The use of the semiconductor device A1 is not limited in any way, and it can be used, for example, as a driving source for a motor, an inverter device for various electrical products, a DC / DC converter, and the like.

[0193] FIG. 21 is a plan view showing the semiconductor device A1. FIG. 22 is a bottom view showing the semiconductor device A1. FIG. 23 is a perspective view of a main part of the semiconductor device A1. FIG. 24 is a plan view of a main part of the semiconductor device A1. FIG. 25 is a cross-sectional view taken along line VV in FIG. 24. FIG. 26 is a cross-sectional view taken along line VI-VI in FIG. 24. FIG. 27 is a plan view of a main part of the semiconductor device A1, omitting the leads 1A-1G, the first conductive members 3A and 3B, the second conductive members 4A and 4B, the third conductive member 5, the fourth conductive member 6, and the sealing resin 7. In these figures, the y direction is the first direction in the present disclosure. The x direction is the second direction in the present disclosure. In addition, in FIGS. 21, 22, 24, etc., the lower side in the figure is defined as one side of the y direction (first direction), and the upper side in the figure is defined as the other side of the y direction (first direction). For convenience of explanation, the upper side in FIGS. 25 and 26 may be referred to as one side in the z direction, and the lower side in the drawings as the other side in the z direction.

[0194] [Multiple leads 1A-1G] The multiple leads 1A-1G are members that support the multiple semiconductor elements 21A, 22A, 23A, 21B, 22B, and 23B and form conductive paths to each of them. The multiple leads 1A-1G are made of metal such as Cu, Ni, or Fe, and are formed by, for example, subjecting a metal plate material to cutting or bending processes. In the following explanation, the first lead 1A, second lead 1B, third lead 1C, fourth lead 1D, fifth lead 1E, sixth lead 1F, and seventh lead 1G will be distinguished from each other.

[0195] As shown in FIG. 27 , the first lead 1A has an island portion 10A, an output terminal 11A, and an intermediate portion 12A. The island portion 10A is a portion on which multiple semiconductor elements 21A, 22A, and 23A are mounted. The shape of the island portion 10A is not particularly limited and is rectangular in the illustrated example. The output terminal 11A is a portion that is electrically connected to a circuit board (not shown) on which the semiconductor device A1 is mounted. The output terminal 11A protrudes toward one side in the y direction relative to the island portion 10A. The intermediate portion 12A is interposed between the island portion 10A and the output terminal 11A. The shape of the intermediate portion 12A is not particularly limited and is rectangular in the illustrated example. The intermediate portion 12A has a larger dimension in the x direction than the output terminal 11A. The intermediate portion 12A is connected to the island portion 10A while being shifted to the left in the x direction in the drawing. The centers of the output terminal 11A and the intermediate portion 12A in the x direction are approximately aligned with each other. As can be seen from FIGS. 22 and 23, the thickness of the output terminal 11A and the intermediate portion 12A in the z direction is thinner than the thickness of the island portion 10A.

[0196] As shown in FIG. 27 , the second lead 1B has an island portion 10B, a positive power supply input terminal 11B, and an intermediate portion 12B. The island portion 10B is a portion on which multiple semiconductor elements 21B, 22B, and 23B are mounted. The shape of the island portion 10B is not particularly limited, and in the illustrated example, it is rectangular. The island portion 10B is spaced apart from the island portion 10A to the left in the x direction. The island portion 10B also overlaps with a portion of the intermediate portion 12A when viewed along the y direction. The positive power supply input terminal 11B is a portion that is electrically connected to a circuit board (not shown) on which the semiconductor device A1 is mounted. The positive power supply input terminal 11B protrudes toward the other side in the y direction relative to the island portion 10B. The intermediate portion 12B is interposed between the island portion 10B and the positive power supply input terminal 11B. The shape of the intermediate portion 12B is not particularly limited, and in the illustrated example, it is rectangular. Furthermore, the intermediate portion 12B has a larger dimension in the x direction than the positive power supply input terminal 11B. The intermediate portion 12B is connected to the island portion 10B with a slight shift to the right in the x direction in the drawing. The positive power supply input terminal 11B is connected to the right end of the intermediate portion 12B in the x direction in the drawing. As can be seen from FIGS. 22 and 23, the thickness in the z direction of the positive power supply input terminal 11B and the intermediate portion 12B is thinner than the thickness of the island portion 10B.

[0197] As shown in FIG. 27, the third lead 1C is disposed on the other side of the island portion 10A in the y direction and spaced apart from the island portion 10A. The third lead 1C has a negative power supply input terminal 11C, a joint portion 12C, and an intermediate portion 13C. The negative power supply input terminal 11C is electrically connected to a circuit board (not shown) on which the semiconductor device A1 is mounted. The negative power supply input terminal 11C protrudes toward the other side of the y direction. The joint portion 12C is located on one side of the negative power supply input terminal 11C in the y direction and has an elongated rectangular shape extending in the x direction. The intermediate portion 13C is connected to one side of the negative power supply input terminal 11C in the y direction and is connected to the joint portion 12C to the right in the x direction in the drawing. The intermediate portion 13C has, for example, a rectangular shape and is located on the other side of the island portion 10A in the y direction. As can be seen from Figures 22 and 23, the thickness of the third lead 1C in the z direction is thinner than the island portions 10A and 10B, and is approximately the same as the output terminal 11A, intermediate portion 12A, positive power supply input terminal 11B, and intermediate portion 12B.

[0198] The fourth lead 1D is spaced apart from the island portion 10A on one side in the y direction. The fourth lead 1D has a first gate terminal 11D, a joint portion 12D, and an intermediate portion 13D. The first gate terminal 11D is a portion that is electrically connected to a circuit board (not shown) on which the semiconductor device A1 is mounted, and is a control terminal of the present disclosure. The first gate terminal 11D protrudes toward one side in the y direction. The joint portion 12D is spaced apart from the island portion 10A on one side in the y direction. In the illustrated example, the joint portion 12D has an elongated rectangular shape with the x direction as its longitudinal direction. The intermediate portion 13D is interposed between the first gate terminal 11D and the joint portion 12D. The intermediate portion 13D has an elongated rectangular shape with the y direction as its longitudinal direction. The x direction dimension of the first gate terminal 11D is smaller than the x direction dimensions of the joint portion 12D and the intermediate portion 13D. As can be seen from FIGS. 22 and 23, the thickness of the fourth lead 1D in the z direction is approximately the same as the thickness of the island portion 10A and the island portion 10B.

[0199] The fifth lead 1E is spaced apart from the island portion 10A on one side in the y direction and spaced apart from the fourth lead 1D to the left in the x direction in the figure. The fifth lead 1E has a first source sense terminal 11E and a junction 12E. The first source sense terminal 11E is a portion that is electrically connected to a circuit board (not shown) on which the semiconductor device A1 is mounted and is an auxiliary terminal of the present disclosure. The first source sense terminal 11E protrudes toward one side in the y direction and is located to the left in the x direction in the figure relative to the first gate terminal 11D. The junction 12E is spaced apart from the island portion 10A on one side in the y direction and is located to the left in the x direction in the figure relative to the junction 12D. In the illustrated example, the junction 12E has an elongated rectangular shape with the x direction as the longitudinal direction. The x direction dimension of the first source sense terminal 11E is smaller than the x direction dimension of the junction 12E. As can be seen from FIGS. 22 and 23, the thickness of the fifth lead 1E in the z direction is approximately the same as the thickness of the island portion 10A and the island portion 10B.

[0200] The sixth lead 1F is spaced apart from the island portion 10B on one side in the y direction. The sixth lead 1F has a second gate terminal 11F, a joint portion 12F, and an intermediate portion 13F. The second gate terminal 11F is a portion that is electrically connected to a circuit board (not shown) on which the semiconductor device A1 is mounted, and is a control terminal of the present disclosure. The second gate terminal 11F protrudes toward one side in the y direction. The joint portion 12F is spaced apart from the island portion 10B on one side in the y direction. In the illustrated example, the joint portion 12F has an elongated rectangular shape with the x direction as its longitudinal direction. The intermediate portion 13F is interposed between the second gate terminal 11F and the joint portion 12F. The intermediate portion 13F has an elongated rectangular shape with the y direction as its longitudinal direction. The x-direction dimension of the second gate terminal 11F is smaller than the x-direction dimensions of the joint portion 12F and the intermediate portion 13F. As can be seen from FIGS. 22 and 23, the thickness of the sixth lead 1F in the z direction is approximately the same as the thickness of the island portion 10A and the island portion 10B.

[0201] The seventh lead 1G is spaced apart from the island portion 10B on one side in the y direction and spaced apart from the sixth lead 1F to the right in the x direction in the figure. The seventh lead 1G has a second source sense terminal 11G and a junction 12G. The second source sense terminal 11G is a portion that is conductively connected to a circuit board (not shown) on which the semiconductor device A1 is mounted and is an auxiliary terminal of the present disclosure. The second source sense terminal 11G protrudes toward one side in the y direction and is located to the right in the x direction in the figure relative to the second gate terminal 11F. The junction 12G is spaced apart from the island portion 10B on one side in the y direction and is located to the left in the x direction in the figure relative to the junction 12F. In the illustrated example, the junction 12G has an elongated rectangular shape with the x direction as the longitudinal direction. The x direction dimension of the second source sense terminal 11G is smaller than the x direction dimension of the junction 12G. As can be seen from FIGS. 22 and 23, the thickness of the seventh lead 1G in the z direction is approximately the same as the thickness of the island portion 10A and the island portion 10B.

[0202] [Multiple semiconductor elements 21A, 22A, 23A, 21B, 22B, 23B] The semiconductor elements 21A, 22A, 23A, 21B, 22B, and 23B are functional elements that perform a switching function. The specific configurations of the semiconductor elements 21A, 22A, 23A, 21B, 22B, and 23B are not limited in any way, and in this embodiment, they are MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) made of a semiconductor material primarily containing SiC (Silicon Carbide). Other examples of the semiconductor elements 21A, 22A, 23A, 21B, 22B, and 23B may include semiconductor materials such as Si (Silicon), GaAs (Gallium Arsenide), and GaN (Gallium Nitride). The semiconductor elements 21A, 22A, 23A, 21B, 22B, and 23B may be, for example, field-effect transistors including metal-insulator-semiconductor field-effect transistors (MISFETs) or bipolar transistors such as insulated gate bipolar transistors (IGBTs). In this embodiment, the semiconductor elements 21A, 22A, 23A, 21B, 22B, and 23B are all the same element, for example, an n-channel MOSFET. Each semiconductor element 10 has, for example, a rectangular shape when viewed along the z direction, but is not limited thereto. In the following description, the semiconductor elements 21A, 22A, 23A, 21B, 22B, and 23B will be distinguished as the first semiconductor element 21A, the second semiconductor element 22A, the third semiconductor element 23A, the first semiconductor element 21B, the second semiconductor element 22B, and the third semiconductor element 23B.

[0203] 23 to 25 and 27, the first semiconductor element 21A, the second semiconductor element 22A, and the third semiconductor element 23A are mounted on the island portion 10A. The first semiconductor element 21A, the second semiconductor element 22A, and the third semiconductor element 23A are arranged in this order from one side to the other side in the y direction.

[0204] The first semiconductor element 21A has a gate electrode 211A, a source electrode 212A, and a drain electrode 213A. The gate electrode 211A is disposed on one side of the first semiconductor element 21A in the z direction and corresponds to a first control electrode in the present disclosure. The source electrode 212A is disposed on one side of the first semiconductor element 21A in the z direction and corresponds to a first principal surface electrode in the present disclosure. The drain electrode 213A is disposed on the other side of the first semiconductor element 21A in the z direction. In the illustrated example, the first semiconductor element 21A has an elongated rectangular shape with the x direction as its longitudinal direction, and the gate electrode 211A is disposed on the right side of the drawing in the x direction. In this embodiment, the drain electrode 213A is conductively joined to the island portion 10A by a conductive bonding material 92. The conductive bonding material 92 is, for example, solder or Ag paste. A silver-plated aluminum sheet having silver-plated layers formed on both sides of an aluminum-containing sheet material (base layer) may be used as the conductive bonding material 92. In this case, a silver-plated layer is formed on the drain electrode 213A, and the silver-plated aluminum sheet and the drain electrode 213A are electrically joined by solid-phase diffusion.

[0205] The second semiconductor element 22A has a gate electrode 221A, a source electrode 222A, and a drain electrode 223A. The gate electrode 221A is disposed on one side of the second semiconductor element 22A in the z direction and corresponds to a second control electrode in the present disclosure. The source electrode 222A is disposed on one side of the second semiconductor element 22A in the z direction and corresponds to a second principal surface electrode in the present disclosure. The drain electrode 223A is disposed on the other side of the second semiconductor element 22A in the z direction. In the illustrated example, the second semiconductor element 22A has an elongated rectangular shape with the x direction as its longitudinal direction, and the gate electrode 221A is disposed to the right in the x direction in the drawing. In this embodiment, the drain electrode 223A is conductively joined to the island portion 10A by a conductive bonding material 92.

[0206] The third semiconductor element 23A has a gate electrode 231A, a source electrode 232A, and a drain electrode 233A. The gate electrode 231A is disposed on one side of the third semiconductor element 23A in the z direction and corresponds to a third control electrode in the present disclosure. The source electrode 232A is disposed on one side of the third semiconductor element 23A in the z direction and corresponds to a third principal surface electrode in the present disclosure. The drain electrode 233A is disposed on the other side of the third semiconductor element 23A in the z direction. In the illustrated example, the third semiconductor element 23A has an elongated rectangular shape with the x direction as its longitudinal direction, and the gate electrode 231A is disposed to the right in the x direction in the drawing. In this embodiment, the drain electrode 233A is conductively joined to the island portion 10A by a conductive bonding material 92.

[0207] The first semiconductor element 21B, the second semiconductor element 22B, and the third semiconductor element 23B are mounted on the island portion 10B, as shown in Figures 23, 24, 26, and 27. The first semiconductor element 21B, the second semiconductor element 22B, and the third semiconductor element 23B are arranged in this order from one side to the other side in the y direction.

[0208] The first semiconductor element 21B has a gate electrode 211B, a source electrode 212B, and a drain electrode 213B. The gate electrode 211B is disposed on one side of the first semiconductor element 21B in the z direction and corresponds to a first control electrode in the present disclosure. The source electrode 212B is disposed on one side of the first semiconductor element 21B in the z direction and corresponds to a first principal surface electrode in the present disclosure. The drain electrode 213B is disposed on the other side of the first semiconductor element 21B in the z direction. In the illustrated example, the first semiconductor element 21B has an elongated rectangular shape with the x direction as its longitudinal direction, and the gate electrode 211B is disposed on the left side of the drawing in the x direction. In the present embodiment, the drain electrode 213B is conductively joined to the island portion 10B by a conductive bonding material 92.

[0209] The second semiconductor element 22B has a gate electrode 221B, a source electrode 222B, and a drain electrode 223B. The gate electrode 221B is disposed on one side of the second semiconductor element 22B in the z direction and corresponds to a second control electrode in the present disclosure. The source electrode 222B is disposed on one side of the second semiconductor element 22B in the z direction and corresponds to a second principal surface electrode in the present disclosure. The drain electrode 223B is disposed on the other side of the second semiconductor element 22B in the z direction. In the illustrated example, the second semiconductor element 22B has an elongated rectangular shape with the x direction as its longitudinal direction, and the gate electrode 221B is disposed on the left side of the drawing in the x direction. In this embodiment, the drain electrode 223B is conductively joined to the island portion 10B by a conductive bonding material 92.

[0210] The third semiconductor element 23B has a gate electrode 231B, a source electrode 232B, and a drain electrode 233B. The gate electrode 231B is disposed on one side of the third semiconductor element 23B in the z direction and corresponds to a third control electrode in the present disclosure. The source electrode 232B is disposed on one side of the third semiconductor element 23B in the z direction and corresponds to a third principal surface electrode in the present disclosure. The drain electrode 233B is disposed on the other side of the third semiconductor element 23B in the z direction. In the illustrated example, the third semiconductor element 23B has an elongated rectangular shape with the x direction as its longitudinal direction, and the gate electrode 231B is disposed on the left side of the drawing in the x direction. In this embodiment, the drain electrode 233B is conductively joined to the island portion 10B by a conductive bonding material 92.

[0211] [Multiple first conductive members 3A, 3B] The plurality of first conductive members 3A, 3B are members that form conductive paths to the plurality of semiconductor elements 21A, 22A, 23A, 21B, 22B, 23B. The plurality of first conductive members 3A, 3B are made of metal such as Cu, Ni, or Fe, and are formed by, for example, subjecting a metal plate material to cutting, bending, or the like.

[0212] The first conductive member 3A mutually conducts the gate electrode 211A of the first semiconductor element 21A, the gate electrode 221A of the second semiconductor element 22A, the gate electrode 231A of the third semiconductor element 23A, and the first gate terminal 11D of the fourth lead 1D. As shown in Figures 28 to 31, the first conductive member 3A of this embodiment has a first branch portion 31A, a second branch portion 32A, a third branch portion 33A, a terminal branch portion 34A, a first connecting portion 35A, a second connecting portion 36A, a third connecting portion 37A, a first relay portion 38A, and a second relay portion 39A.

[0213] As shown in FIGS. 23 to 25, first branch portion 31A is a portion that has a portion bonded to gate electrode 211A of first semiconductor element 21A. In the example shown, first branch portion 31A has bonding portion 311A ​​and inclined portion 312A. Bonding portion 311A ​​is conductively bonded to gate electrode 211A by conductive bonding material 93. Conductive bonding material 93 is, for example, solder or Ag paste. Inclined portion 312A is connected to bonding portion 311A ​​and extends from bonding portion 311A ​​to one side in the z direction and to the right in the x direction in the drawings.

[0214] 23 to 25, second branch portion 32A is a portion that has a portion bonded to gate electrode 221A of second semiconductor element 22A. In the example shown, second branch portion 32A has bonding portion 321A and inclined portion 322A. Bonding portion 321A is conductively bonded to gate electrode 221A by conductive bonding material 93. Inclined portion 322A is connected to bonding portion 321A and extends from bonding portion 321A to one side in the z direction and to the right in the x direction in the drawings.

[0215] 23 to 25, the third branch portion 33A is a portion that has a portion bonded to the gate electrode 231A of the third semiconductor element 23A. In the example shown, the third branch portion 33A has a bonding portion 331A and an inclined portion 332A. The bonding portion 331A is conductively bonded to the gate electrode 231A by a conductive bonding material 93. The inclined portion 332A is connected to the bonding portion 331A and extends from the bonding portion 331A to one side in the z direction and to the right in the x direction in the drawings.

[0216] In this embodiment, as shown in FIG. 24, the area occupied by the first gate terminal 11D in the x direction overlaps with the areas occupied by the junction 311A ​​of the first branch portion 31A, the junction 321A of the second branch portion 32A, and the junction 331A of the third branch portion 33A in the x direction.

[0217] As shown in FIGS. 23, 24, and 28 to 31, the terminal branch 34A is a portion that is electrically connected to the first gate terminal 11D and has a portion that is joined to the joint 12D of the fourth lead 1D. In the example shown, the terminal branch 34A has a joint 341A and an inclined portion 342A. The joint 341A is electrically connected to the joint 12D by a conductive bonding material 93. The inclined portion 342A is connected to the joint 341A and extends from the joint 341A to one side in the z direction and to the other side in the y direction.

[0218] As shown in FIGS. 23, 24, and 28 to 31, the first connecting portion 35A connects the first branch portion 31A and the second branch portion 32A. In the illustrated example, the first connecting portion 35A connects the end of the inclined portion 312A of the first branch portion 31A to the end of the inclined portion 322A of the second branch portion 32A. The first connecting portion 35A extends in the y direction. The first connecting portion 35A is located on one side in the z direction with respect to the joints 311A ​​and 321A.

[0219] As shown in FIGS. 23, 24, and 28 to 31, the second connecting portion 36A connects the second branch portion 32A and the third branch portion 33A. In the illustrated example, the second connecting portion 36A connects the end of the inclined portion 322A of the second branch portion 32A to the inclined portion 332A of the third branch portion 33A. The second connecting portion 36A extends in the y direction. The first connecting portion 35A and the second connecting portion 36A overlap each other when viewed in the y direction. The second connecting portion 36A is located on one side in the z direction with respect to the joints 321A and 331A.

[0220] As shown in FIGS. 23, 24, and 28 to 31, the third connecting portion 37A is a portion interposed between the third branch portion 33A and the terminal branch portion 34A. In this embodiment, the third connecting portion 37A extends in the y direction. The third connecting portion 37A is disposed to the right in the x direction relative to the first connecting portion 35A and the second connecting portion 36A. The position of the third connecting portion 37A in the z direction is substantially the same as that of the first connecting portion 35A and the second connecting portion 36A. In the illustrated example, the first connecting portion 35A and the second connecting portion 36A are disposed parallel to the third connecting portion 37A over their respective entire lengths. The dimension of the third connecting portion 37A in the x direction is greater than that of the first connecting portion 35A and the second connecting portion 36A.

[0221] 23, 24, and 28 to 31, the first relay portion 38A is connected to the other side in the y direction of the second connecting portion 36A and the other side in the y direction of the third connecting portion 37A. The first relay portion 38A extends along the x direction. The position in the z direction of the first relay portion 38A is approximately the same as that of the first connecting portion 35A, the second connecting portion 36A, and the third connecting portion 37A.

[0222] 23, 24, and 28 to 31, the second relay portion 39A is connected to one side portion in the y direction of the third connecting portion 37A and the other side portion in the y direction of the inclined portion 342A of the terminal branch portion 34A. The first relay portion 38A extends along the x direction. The position in the z direction of the first relay portion 38A is substantially the same as that of the first connecting portion 35A, the second connecting portion 36A, and the third connecting portion 37A.

[0223] The first conductive member 3B mutually connects the gate electrode 211B of the first semiconductor element 21B, the gate electrode 221B of the second semiconductor element 22B, the gate electrode 231B of the third semiconductor element 23B, and the second gate terminal 11F of the sixth lead 1F. As shown in Figures 32 to 35, the first conductive member 3B of this embodiment has a first branch portion 31B, a second branch portion 32B, a third branch portion 33B, a terminal branch portion 34B, a first connecting portion 35B, a second connecting portion 36B, a third connecting portion 37B, a first relay portion 38B, and a second relay portion 39B.

[0224] 23, 24, and 26, first branch portion 31B is a portion that has a portion bonded to gate electrode 211B of first semiconductor element 21B. In the example shown, first branch portion 31B has bonding portion 311B and inclined portion 312B. Bond portion 311B is conductively bonded to gate electrode 211B by conductive bonding material 93. Inclined portion 312B is connected to bonding portion 311B and extends from bonding portion 311B to one side in the z direction and toward the left in the x direction in the drawings.

[0225] 23, 24, and 26, second branch portion 32B is a portion that has a portion bonded to gate electrode 221B of second semiconductor element 22B. In the example shown, second branch portion 32B has bonding portion 321B and inclined portion 322B. Bonding portion 321B is conductively bonded to gate electrode 221B by conductive bonding material 93. Inclined portion 322B is connected to bonding portion 321B and extends from bonding portion 321B to one side in the z direction and toward the left in the x direction in the drawings.

[0226] 23, 24, and 26, the third branch portion 33B is a portion that has a portion bonded to the gate electrode 231B of the third semiconductor element 23B. In the example shown, the third branch portion 33B has a bonding portion 331B and an inclined portion 332B. The bonding portion 331B is conductively bonded to the gate electrode 231B by a conductive bonding material 93. The inclined portion 332B is connected to the bonding portion 331B and extends from the bonding portion 331B to one side in the z direction and to the left in the x direction in the drawings.

[0227] In this embodiment, as shown in FIG. 24, the area occupied by the second gate terminal 11F in the x direction overlaps with the areas occupied by the junction 311B of the first branch portion 31B, the junction 321B of the second branch portion 32B, and the junction 331B of the third branch portion 33B in the x direction.

[0228] As shown in FIGS. 23, 24, and 32 to 35, the terminal branch 34B is a portion that is electrically connected to the second gate terminal 11F and has a portion that is joined to the joint 12F of the sixth lead 1F. In the example shown, the terminal branch 34B has a joint 341B and an inclined portion 342B. The joint 341B is electrically connected to the joint 12F by a conductive bonding material 93. The inclined portion 342B is connected to the joint 341B and extends from the joint 341B to one side in the z direction and to the other side in the y direction.

[0229] As shown in FIGS. 23, 24, and 32 to 35, the first connecting portion 35B connects the first branch portion 31B and the second branch portion 32B. In the illustrated example, the first connecting portion 35B connects the end of the inclined portion 312B of the first branch portion 31B to the end of the inclined portion 322B of the second branch portion 32B. The first connecting portion 35B extends in the y direction. The first connecting portion 35B is located on one side in the z direction with respect to the joints 311B and 321B.

[0230] As shown in FIGS. 23, 24, and 32 to 35, the second connecting portion 36B connects the second branch portion 32B and the third branch portion 33B. In the illustrated example, the second connecting portion 36B connects the end of the inclined portion 322B of the second branch portion 32B to the inclined portion 332B of the third branch portion 33B. The second connecting portion 36B extends in the y direction. The first connecting portion 35B and the second connecting portion 36B overlap each other when viewed in the y direction. The second connecting portion 36B is located on one side in the z direction with respect to the joints 321B and 331B.

[0231] As shown in FIGS. 23, 24, and 32 to 35, the third connecting portion 37B is a portion interposed between the third branch portion 33B and the terminal branch portion 34B. In this embodiment, the third connecting portion 37B extends along the y direction. The third connecting portion 37B is disposed spaced apart from the first connecting portion 35B and the second connecting portion 36B to the left in the x direction in the drawings. The position of the third connecting portion 37B in the z direction is substantially the same as that of the first connecting portion 35B and the second connecting portion 36B. In the illustrated example, the first connecting portion 35B and the second connecting portion 36B are disposed parallel to the third connecting portion 37B over their respective entire lengths. The dimension of the third connecting portion 37B in the x direction is greater than that of the first connecting portion 35B and the second connecting portion 36B.

[0232] As shown in Figures 23, 24, and 32 to 35, the first relay portion 38B is connected to the other side in the y direction of the second connecting portion 36B and the other side in the y direction of the third connecting portion 37B. The first relay portion 38B extends along the x direction. The position in the z direction of the first relay portion 38B is approximately the same as that of the first connecting portion 35B, the second connecting portion 36B, and the third connecting portion 37B.

[0233] As shown in Figures 23, 24, and 32 to 35, the second relay portion 39B is connected to one side portion in the y direction of the third connecting portion 37B and the other side portion in the y direction of the inclined portion 342B of the terminal branch portion 34B. The first relay portion 38B extends along the x direction. The position in the z direction of the first relay portion 38B is approximately the same as that of the first connecting portion 35B, the second connecting portion 36B, and the third connecting portion 37B.

[0234] [Multiple second conductive members 4A, 4B] The plurality of second conductive members 4A, 4B are members that form conductive paths to the plurality of semiconductor elements 21A, 22A, 23A, 21B, 22B, 23B. The plurality of first conductive members 3A, 3B are made of a metal such as Cu, Ni, or Fe, and are formed, for example, by subjecting a metal plate material to cutting, bending, or the like.

[0235] The second conductive member 4A mutually connects the source electrode 212A of the first semiconductor element 21A, the source electrode 222A of the second semiconductor element 22A, the source electrode 232A of the third semiconductor element 23A, and the first source sense terminal 11E of the fifth lead 1E. As shown in Figures 36 to 39, the second conductive member 4A of this embodiment has a first branch portion 41A, a second branch portion 42A, a third branch portion 43A, a terminal branch portion 44A, a first connecting portion 45A, a second connecting portion 46A, a third connecting portion 47A, a first relay portion 48A, and a second relay portion 49A.

[0236] 23 and 24, the first branch portion 41A is a portion that has a portion bonded to the source electrode 212A of the first semiconductor element 21A. In the illustrated example, as shown in FIGS. 36 to 39, the first branch portion 41A has a joint 411A and an inclined portion 412A. The joint 411A is conductively bonded to the source electrode 212A by a conductive bonding material 93. The inclined portion 412A is connected to the joint 411A and extends from the joint 411A to one side in the z direction and toward the left in the x direction in the drawings.

[0237] 23 and 24, second branch portion 42A is a portion that has a portion bonded to source electrode 222A of second semiconductor element 22A. In the illustrated example, as shown in FIGS. 36 to 39, second branch portion 42A has joint portion 421A and inclined portion 422A. Joint portion 421A is conductively bonded to source electrode 222A by conductive bonding material 93. Inclined portion 422A is connected to joint portion 421A and extends from joint portion 421A to one side in the z direction and toward the left in the x direction in the drawings.

[0238] 23 and 24, the third branch portion 43A is a portion that has a portion that is joined to the source electrode 232A of the third semiconductor element 23A. In the illustrated example, as shown in FIGS. 36 to 39, the third branch portion 43A has a joint 431A and an inclined portion 432A. The joint 431A is conductively joined to the source electrode 232A by a conductive bonding material 93. The inclined portion 432A is connected to the joint 431A and extends from the joint 431A to one side in the z direction and toward the left in the x direction in the drawings.

[0239] As shown in FIGS. 23, 24, and 36 to 39, terminal branch 44A is a portion that is electrically connected to first source sense terminal 11E and has a portion that is joined to joint 12F of fifth lead 1E. In the example shown, terminal branch 44A has joint 441A and inclined portion 442A. Joint 441A is electrically connected to joint 12F by conductive bonding material 93. Inclined portion 442A is connected to joint 441A and extends from joint 441A to one side in the z direction and toward the other side in the y direction.

[0240] As shown in FIGS. 23, 24, and 36 to 39, the first connecting portion 45A connects the first branch portion 41A and the second branch portion 42A. In the illustrated example, the first connecting portion 45A connects the end of the inclined portion 412A of the first branch portion 41A to the end of the inclined portion 422A of the second branch portion 42A. The first connecting portion 45A extends in the y direction. The first connecting portion 45A is located on one side in the z direction with respect to the joints 411A and 421A.

[0241] As shown in FIGS. 23, 24, and 36 to 39, the second connecting portion 46A connects the second branch portion 42A and the third branch portion 43A. In the illustrated example, the second connecting portion 46A connects the end of the inclined portion 422A of the second branch portion 42A to the inclined portion 432A of the third branch portion 43A. The second connecting portion 46A extends along the y direction. The first connecting portion 45A and the second connecting portion 46A overlap each other when viewed along the y direction. The second connecting portion 46A is located on one side in the z direction with respect to the joints 421A and 431A.

[0242] As shown in FIGS. 23, 24, and 36 to 39, the third connecting portion 47A is a portion interposed between the third branch portion 43A and the terminal branch portion 44A. In this embodiment, the third connecting portion 47A extends in the y direction. The third connecting portion 47A is disposed spaced apart from the first connecting portion 45A and the second connecting portion 46A to the left in the x direction in the drawings. The position of the third connecting portion 47A in the z direction is substantially the same as that of the first connecting portion 45A and the second connecting portion 46A. In the illustrated example, the first connecting portion 45A and the second connecting portion 46A are disposed parallel to the third connecting portion 47A over their respective entire lengths. The dimension of the third connecting portion 47A in the x direction is greater than that of the first connecting portion 45A and the second connecting portion 46A.

[0243] 23, 24, and 36 to 39, the first relay portion 48A is connected to the other side portion in the y direction of the second connecting portion 46A and the other side portion in the y direction of the third connecting portion 47A. The first relay portion 48A extends along the x direction. The position in the z direction of the first relay portion 48A is substantially the same as that of the first connecting portion 45A, the second connecting portion 46A, and the third connecting portion 47A.

[0244] 23, 24, and 36 to 39, the second relay portion 49A is connected to one side portion in the y direction of the third connecting portion 47A and the other side portion in the y direction of the inclined portion 442A of the terminal branch portion 44A. The first relay portion 48A extends along the x direction. The position in the z direction of the first relay portion 48A is substantially the same as that of the first connecting portion 45A, the second connecting portion 46A, and the third connecting portion 47A.

[0245] The second conductive member 4B mutually connects the source electrode 212B of the first semiconductor element 21B, the source electrode 222B of the second semiconductor element 22B, the source electrode 232B of the third semiconductor element 23B, and the second source sense terminal 11G of the seventh lead 1G. As shown in Figures 40 to 43, the second conductive member 4B of this embodiment has a first branch portion 41B, a second branch portion 42B, a third branch portion 43B, a terminal branch portion 44B, a first connecting portion 45B, a second connecting portion 46B, a third connecting portion 47B, a first relay portion 48B, and a second relay portion 49B.

[0246] 23 and 24, the first branch portion 41B is a portion that has a portion bonded to the source electrode 212B of the first semiconductor element 21B. In the illustrated example, as shown in FIGS. 40 to 43, the first branch portion 41B has a joint 411B and an inclined portion 412B. The joint 411B is conductively bonded to the source electrode 212B by a conductive bonding material 93. The inclined portion 412B is connected to the joint 411B and extends from the joint 411B to one side in the z direction and to the right in the x direction in the drawings.

[0247] 23 and 24, second branch portion 42B is a portion that has a portion joined to source electrode 222B of second semiconductor element 22B. In the illustrated example, as shown in FIGS. 40 to 43, second branch portion 42B has joint portion 421B and inclined portion 422B. Joint portion 421B is conductively joined to source electrode 222B by conductive bonding material 93. Inclined portion 422B is connected to joint portion 421B and extends from joint portion 421B to one side in the z direction and to the right in the x direction in the drawings.

[0248] 23 and 24, the third branch portion 43B is a portion that has a portion bonded to the source electrode 232B of the third semiconductor element 23B. In the illustrated example, as shown in FIGS. 40 to 43, the third branch portion 43B has a joint 431B and an inclined portion 432B. The joint 431B is conductively bonded to the source electrode 232B by a conductive bonding material 93. The inclined portion 432B is connected to the joint 431B and extends from the joint 431B to one side in the z direction and to the right in the x direction in the drawings.

[0249] As shown in FIGS. 23, 24, and 40 to 43, the terminal branch 44B is a portion that is electrically connected to the second source sense terminal 11G and has a portion that is joined to the joint 12G of the seventh lead 1G. In the example shown, the terminal branch 44B has a joint 441B and an inclined portion 442B. The joint 441B is electrically connected to the joint 12G by a conductive bonding material 93. The inclined portion 442B is connected to the joint 441B and extends from the joint 441B to one side in the z direction and to the other side in the y direction.

[0250] As shown in FIGS. 23, 24, and 40 to 43, the first connecting portion 45B connects the first branch portion 41B and the second branch portion 42B. In the illustrated example, the first connecting portion 45B connects an end of the inclined portion 412B of the first branch portion 41B to an end of the inclined portion 422B of the second branch portion 42B. The first connecting portion 45B extends in the y direction. The first connecting portion 45B is located on one side in the z direction with respect to the joints 411B and 421B.

[0251] As shown in FIGS. 23, 24, and 40 to 43, the second connecting portion 46B connects the second branch portion 42B and the third branch portion 43B. In the illustrated example, the second connecting portion 46B connects the end of the inclined portion 422B of the second branch portion 42B to the inclined portion 432B of the third branch portion 43B. The second connecting portion 46B extends along the y direction. The first connecting portion 45B and the second connecting portion 46B overlap each other when viewed along the y direction. The second connecting portion 46B is located on one side in the z direction with respect to the joints 421B and 431B.

[0252] As shown in FIGS. 23, 24, and 40 to 43, the third connecting portion 47B is a portion interposed between the third branch portion 43B and the terminal branch portion 44B. In this embodiment, the third connecting portion 47B extends in the y direction. The third connecting portion 47B is disposed to the right in the x direction relative to the first connecting portion 45B and the second connecting portion 46B. The position of the third connecting portion 47B in the z direction is substantially the same as that of the first connecting portion 45B and the second connecting portion 46B. In the illustrated example, the first connecting portion 45B and the second connecting portion 46B are disposed parallel to the third connecting portion 47B over their respective entire lengths. The dimension of the third connecting portion 47B in the x direction is greater than that of the first connecting portion 45B and the second connecting portion 46B.

[0253] 23, 24, and 40 to 43, the first relay portion 48B is connected to the other side portion in the y direction of the second connecting portion 46B and the other side portion in the y direction of the third connecting portion 47B. The first relay portion 48B extends along the x direction. The position in the z direction of the first relay portion 48B is substantially the same as that of the first connecting portion 45B, the second connecting portion 46B, and the third connecting portion 47B.

[0254] 23, 24, and 40 to 43, the second relay portion 49B is connected to one side portion in the y direction of the third connecting portion 47B and the other side portion in the y direction of the inclined portion 442B of the terminal branch portion 44B. The first relay portion 48B extends along the x direction. The position in the z direction of the first relay portion 48B is substantially the same as that of the first connecting portion 45B, the second connecting portion 46B, and the third connecting portion 47B.

[0255] [Third conductive member 5] The third conductive member 5 electrically connects the source electrode 212A of the first semiconductor element 21A, the source electrode 222A of the second semiconductor element 22A, and the source electrode 232A of the third semiconductor element 23A to the negative power supply input terminal 11C. The third conductive member 5 is made of a metal such as Cu, Ni, or Fe, and is formed by subjecting a metal plate material to cutting, bending, or the like, for example.

[0256] As shown in FIGS. 23 to 25 and 44 to 47, the third conductive member 5 of this embodiment has a first branch portion 51C, a second branch portion 52C, a third branch portion 53C, a terminal branch portion 54C, and a connecting portion 55C.

[0257] As shown in FIGS. 23 and 24, first branch portion 51C is a portion that has a portion bonded to source electrode 212A of first semiconductor element 21A. In the illustrated example, as shown in FIGS. 36 to 39, first branch portion 51C has joint 511C and inclined portion 512C. Joint portion 511C is conductively bonded to source electrode 212A by conductive bonding material 93. Joint portion 511C is larger than joint 411A of first branch portion 41A. Inclined portion 512C is connected to joint 511C and extends from joint 511C to one side in the z direction and to the left in the x direction in the drawings.

[0258] As shown in FIGS. 23 and 24, second branch portion 52C is a portion that has a portion joined to source electrode 222A of second semiconductor element 22A. In the illustrated example, as shown in FIGS. 36 to 39, second branch portion 52C has joint 521C and inclined portion 522C. Joint portion 521C is conductively joined to source electrode 222A by conductive bonding material 93. Joint portion 521C is larger than joint 421A of second branch portion 42A. Inclined portion 522C is connected to joint 521C and extends from joint 521C to one side in the z direction and to the left in the x direction in the drawings.

[0259] As shown in FIGS. 23 and 24, the third branch portion 53C is a portion that has a portion bonded to the source electrode 232A of the third semiconductor element 23A. In the illustrated example, as shown in FIGS. 36 to 39, the third branch portion 53C has a joint 531C and an inclined portion 532C. The joint 531C is conductively bonded to the source electrode 232A by a conductive bonding material 93. The joint 531C is larger than the joint 431A of the third branch portion 43A. The inclined portion 532C is connected to the joint 531C and extends from the joint 531C to one side in the z direction and to the left in the x direction in the drawings.

[0260] As shown in FIGS. 23, 24, and 44 to 47, terminal branch 54C is a portion that is electrically connected to negative power supply input terminal 11C and has a portion joined to joint 12C of third lead 1C. In the example shown, terminal branch 54C has joint 541C and inclined portion 542C. Joint 541C is electrically connected to joint 12C by conductive bonding material 93. Inclined portion 542C is connected to joint 541C and extends from joint 541C toward one side in the z direction and one side in the y direction.

[0261] As shown in FIGS. 23, 24, and 44 to 47, the connecting portion 55C connects the first branch portion 51C, the second branch portion 52C, the third branch portion 53C, and the terminal branch portion 54C. In the illustrated example, the connecting portion 55C connects an end of the inclined portion 512C of the first branch portion 51C, an end of the inclined portion 522C of the second branch portion 52C, an end of the inclined portion 532C of the third branch portion 53C, and an end of the inclined portion 542C of the terminal branch portion 54C. The connecting portion 55C extends along the y direction. The connecting portion 55C is located on one side in the z direction relative to the joints 511C, 521C, 531C, and 541C. The x-direction dimension of connecting portion 55C is larger than the x-direction dimensions of third connecting portion 37A, third connecting portion 37B, third connecting portion 47A, and third connecting portion 47B. Connecting portion 55C overlaps with a portion of island portion 10A and a portion of island portion 10B when viewed along the z-direction. In the illustrated example, connecting portion 55C is located to one side in the z-direction of third connecting portion 37A, third connecting portion 37B, third connecting portion 47A, and third connecting portion 47B.

[0262] [Fourth conductive member 6] The fourth conductive member 6 electrically connects the source electrode 212B of the first semiconductor element 21B, the source electrode 222B of the second semiconductor element 22B, and the source electrode 232B of the third semiconductor element 23B to the drain electrode 213A of the first semiconductor element 21A, the drain electrode 223A of the second semiconductor element 22A, and the drain electrode 233A of the third semiconductor element 23A via the island portion 10A. The fourth conductive member 6 is made of a metal such as Cu, Ni, or Fe, and is formed by, for example, subjecting a metal plate to processing such as cutting or bending.

[0263] The fourth conductive member 6 of this embodiment has a first branch portion 61C, a second branch portion 62C, a third branch portion 63C, a relay branch portion 64C, and a connecting portion 65C. As shown in FIGS. 23 to 26, the first branch portion 61C is a portion that has a portion bonded to the source electrode 212B of the first semiconductor element 21B. In the illustrated example, as shown in FIGS. 48 to 51, the first branch portion 61C has a joint 611C and an inclined portion 612C. The joint 611C is conductively bonded to the source electrode 212B by a conductive bonding material 93. The joint 611C is larger than the joint 411B of the first branch portion 41B. The inclined portion 612C is connected to the joint 611C and extends from the joint 611C to one side in the z direction and to the right in the x direction in the drawings.

[0264] As shown in FIGS. 23 to 26, second branch portion 62C is a portion that has a portion bonded to source electrode 222B of second semiconductor element 22B. In the illustrated example, as shown in FIGS. 48 to 51, second branch portion 62C has joint portion 621C and inclined portion 622C. Joint portion 621C is conductively bonded to source electrode 222B by conductive bonding material 93. Joint portion 621C is larger than joint portion 421B of second branch portion 42B. Inclined portion 622C is connected to joint portion 621C and extends from joint portion 621C to one side in the z direction and to the right in the x direction in the drawings.

[0265] As shown in FIGS. 23 to 26, the third branch portion 63C is a portion that has a portion bonded to the source electrode 232B of the third semiconductor element 23B. In the illustrated example, as shown in FIGS. 48 to 51, the third branch portion 63C has a joint 631C and an inclined portion 632C. The joint 631C is conductively bonded to the source electrode 232B by a conductive bonding material 93. The joint 631C is larger than the joint 431B of the third branch portion 43B. The inclined portion 632C is connected to the joint 631C and extends from the joint 631C to one side in the z direction and to the right in the x direction in the drawings.

[0266] As shown in FIGS. 23 to 26 and 48 to 51 , the relay branch 64C is a portion electrically connected to the drain electrode 213A of the first semiconductor element 21A, the drain electrode 223A of the second semiconductor element 22A, and the drain electrode 233A of the third semiconductor element 23A, and has a portion bonded to the island portion 10A. In the illustrated example, the relay branch 64C has a bonding portion 641C and an inclined portion 642C. The bonding portion 641C is electrically connected to a portion of the island portion 10A on the left side in the x direction of the first semiconductor element 21A, the second semiconductor element 22A, and the third semiconductor element 23A by a conductive bonding material 93. In the illustrated example, the bonding portion 641C overlaps the first semiconductor element 21A, the second semiconductor element 22A, and the third semiconductor element 23A when viewed along the x direction, and has a strip shape extending elongatedly in the y direction. The inclined portion 642C is connected to the joint portion 641C and extends from the joint portion 641C to one side in the z direction, toward the left in the x direction in the figure. In the illustrated example, the relay branch portion 64C overlaps with the connecting portion 55C of the third conductive member 5 when viewed along the z direction.

[0267] As shown in FIGS. 23 to 26 and 48 to 51, the connecting portion 65C connects the first branch portion 61C, the second branch portion 62C, and the third branch portion 63C to the relay branch portion 64C. In the illustrated example, the connecting portion 65C connects an end of the inclined portion 612C of the first branch portion 61C, an end of the inclined portion 622C of the second branch portion 62C, an end of the inclined portion 632C of the third branch portion 63C, and an end of the inclined portion 642C of the relay branch portion 64C. The connecting portion 65C extends along the y direction. The connecting portion 65C is located on one side in the z direction relative to the joint portions 611C and 621C. The connecting portion 65C is located on the other side in the z direction relative to the connecting portion 55C of the third conductive member 5. In the illustrated example, the connecting portion 65C overlaps with the connecting portion 55C of the third conductive member 5 when viewed along the z direction.

[0268] [Sealing resin 7] The sealing resin 7 covers a portion of each of the leads 1A to 1G, the semiconductor elements 21A, 22A, 23A, 21B, 22B, and 23B, the first conductive members 3A and 3B, the second conductive members 4A and 4B, the third conductive member 5, and the fourth conductive member 6. The sealing resin 7 is made of an insulating resin, such as a black epoxy resin. The shape of the sealing resin 7 is not particularly limited, and in this embodiment, as shown in FIGS. 21 and 22 , the sealing resin 7 has a main surface 71C, a back surface 72C, a pair of first side surfaces 73C, and a pair of second side surfaces 74C, and is rectangular when viewed along the z direction.

[0269] The main surface 71C faces one side in the z direction. The back surface 72C faces the other side in the z direction. In this embodiment, the island portion 10A, the island portion 10B, the fourth lead 1D, the fifth lead 1E, the sixth lead 1F, and the seventh lead 1G are exposed from the back surface 72C.

[0270] The pair of first side surfaces 73C are surfaces facing both sides in the y direction. The second lead 1B and the third lead 1C protrude from the first side surface 73C on the other side in the y direction. The first lead 1A, the fourth lead 1D, the fifth lead 1E, the sixth lead 1F, and the seventh lead 1G protrude from the first side surface 73C on one side in the y direction.

[0271] The pair of second side surfaces 74C are surfaces facing both sides in the x direction. Next, the operation of the semiconductor device A1 will be described. According to this embodiment, as shown in FIG. 24 , the conduction path between the first gate terminal 11D and the gate electrode 211A of the first semiconductor element 21A includes the first connector 35A and the third connector 37A, through which current flows in opposite directions in the y direction. The inclusion of such a portion in the conduction path can cancel out self-inductance caused by abrupt increases and decreases in current, thereby reducing inductance. Furthermore, the conduction path between the first gate terminal 11D and the gate electrode 221A of the second semiconductor element 22A includes the first connector 35A and the third connector 37A, through which current flows in opposite directions in the y direction. This portion also cancels out self-inductance, thereby reducing inductance. Therefore, control voltages can be applied more uniformly to the multiple first semiconductor elements 21A, second semiconductor elements 22A, and third semiconductor elements 23A.

[0272] The first connecting portion 35A, the second connecting portion 36A, and the third connecting portion 37A all extend linearly in the y direction. This allows the self-inductance to be more reliably canceled out. Furthermore, a configuration in which the first connecting portion 35A and the second connecting portion 36A are parallel to the third connecting portion 37A over their respective entire lengths is preferable for canceling out the self-inductance.

[0273] The third connecting portion 37A is spaced apart in the x direction from the first connecting portion 35A and the second connecting portion 36A, which prevents the dimension of the semiconductor device A1 in the z direction from becoming excessively large.

[0274] The above-mentioned effects can also be achieved by the first conductive member 3B, the second conductive member 4A, and the second conductive member 4B. 52 to 74 show other embodiments of the present disclosure. In these figures, elements that are the same as or similar to those in the above embodiment are given the same reference numerals as those in the above embodiment.

[0275] Eighth Embodiment 52 to 68 show a semiconductor device according to an eighth embodiment of the present disclosure. A semiconductor device A2 according to this embodiment differs from the above-described embodiments mainly in the configurations of first conductive members 3A, 3B and second conductive members 4A, 4B.

[0276] [Multiple first conductive members 3A, 3B] 52 to 56, the first conductive member 3A of this embodiment has a first branch portion 31A, a second branch portion 32A, a third branch portion 33A, a terminal branch portion 34A, a first connecting portion 35A, a second connecting portion 36A, a relay portion 3aA, a relay portion 3bA, a connecting portion 3cA, a relay portion 3dA, a connecting portion 3eA, and a second relay portion 39A. In the illustrated example, the widths of each portion of the first conductive member 3A as viewed in the z direction (x-direction dimension or y-direction dimension) are substantially the same.

[0277] The configurations of the first branch portion 31A, the second branch portion 32A, the third branch portion 33A, the terminal branch portion 34A, the first connecting portion 35A and the second connecting portion 36A are the same as those in the semiconductor device A1 described above.

[0278] The relay portion 3aA extends from one side of the first connecting portion 35A in the y direction to the right in the x direction in the figure. The relay portion 3bA extends from the other side of the second connecting portion 36A in the y direction to the right in the x direction in the figure. The connecting portion 3cA connects the x-direction ends of the relay portion 3aA and the relay portion 3bA to each other. The relay portion 3dA extends from the center of the connecting portion 3cA in the y direction to the right in the x direction in the figure. The connecting portion 3eA extends from the x-direction end of the relay portion 3dA to one side in the y direction. The second relay portion 39A connects one y-direction end of the connecting portion 3eA to the other y-direction end of the terminal branch portion 34A. The positions in the z direction of relay portion 3aA, relay portion 3bA, connecting portion 3cA, relay portion 3dA, connecting portion 3eA and second relay portion 39A are located on one side in the z direction of joint portion 311A, joint portion 321A, joint portion 331A and joint portion 341A.

[0279] 52 and 57 to 60, the first conductive member 3B of this embodiment has a first branch portion 31B, a second branch portion 32B, a third branch portion 33B, a terminal branch portion 34B, a first connecting portion 35B, a second connecting portion 36B, a relay portion 3aB, a relay portion 3bB, a connecting portion 3cB, a relay portion 3dB, a connecting portion 3eB, and a second relay portion 39B. In the illustrated example, the widths of each portion of the first conductive member 3B as viewed in the z direction (x-direction dimension or y-direction dimension) are substantially the same.

[0280] The configurations of the first branch portion 31B, the second branch portion 32B, the third branch portion 33B, the terminal branch portion 34B, the first connecting portion 35B and the second connecting portion 36B are similar to the configurations in the first conductive member 3A of this embodiment (see Figures 53 to 56), except for the manner in which each portion extends in the x-direction.

[0281] The relay portion 3aB extends from one side in the y direction of the first connecting portion 35B to the left in the figure in the x direction. The relay portion 3bB extends from the other side in the y direction of the second connecting portion 36B to the left in the figure in the x direction. The connecting portion 3cB connects the x-direction ends of the relay portions 3aB and 3bB to each other. The relay portion 3dB extends from the center portion in the y direction of the connecting portion 3cB to the left in the figure in the x direction. The connecting portion 3eB extends from the x-direction end of the relay portion 3dB to one side in the y direction. The second relay portion 39B connects one y-direction end of the connecting portion 3eB to the other y-direction end of the terminal branch portion 34B. The positions in the z direction of relay portion 3aB, relay portion 3bB, connecting portion 3cB, relay portion 3dB, connecting portion 3eB and second relay portion 39B are located on one side in the z direction of joint portion 311B, joint portion 321B, joint portion 331B and joint portion 341B.

[0282] [Multiple second conductive members 4A, 4B] 52 and 61 to 64, the second conductive member 4A of this embodiment has a first branch portion 41A, a second branch portion 42A, a third branch portion 43A, a terminal branch portion 44A, a first connecting portion 45A, a second connecting portion 46A, a relay portion 4aA, a relay portion 4bA, a connecting portion 4cA, a relay portion 4dA, a connecting portion 4eA, and a second relay portion 49A. In the illustrated example, the widths of each portion of the second conductive member 4A as viewed in the z direction (x-direction dimension or y-direction dimension) are substantially the same.

[0283] The configurations of the first branch portion 41A, the second branch portion 42A, the third branch portion 43A, the terminal branch portion 44A, the first connecting portion 45A and the second connecting portion 46A are the same as those in the first conductive member 3B of the present embodiment described above (see Figures 57 to 60).

[0284] The relay portion 4aA extends from one side of the first connecting portion 45A in the y direction to the left in the figure in the x direction. The relay portion 4bA extends from the other side of the second connecting portion 46A in the y direction to the left in the figure in the x direction. The connecting portion 4cA connects the x-direction ends of the relay portion 4aA and the relay portion 4bA to each other. The relay portion 4dA extends from the center of the connecting portion 4cA in the y direction to the left in the figure in the x direction. The connecting portion 4eA extends from the x-direction end of the relay portion 4dA to one side in the y direction. The second relay portion 49A connects one y-direction end of the connecting portion 4eA to the other y-direction end of the terminal branch portion 44A. The positions in the z direction of relay portion 4aA, relay portion 4bA, connecting portion 4cA, relay portion 4dA, connecting portion 4eA and second relay portion 49A are located on one side in the z direction of joint portion 411A, joint portion 421A, joint portion 431A and joint portion 441A.

[0285] 52 and 65 to 68, the second conductive member 4B of this embodiment has a first branch portion 41B, a second branch portion 42B, a third branch portion 43B, a terminal branch portion 44B, a first connecting portion 45B, a second connecting portion 46B, a relay portion 4aB, a relay portion 4bB, a connecting portion 4cB, a relay portion 4dB, a connecting portion 4eB, and a second relay portion 49B. In the illustrated example, the widths of each portion of the second conductive member 4B as viewed in the z direction (x-direction dimension or y-direction dimension) are substantially the same.

[0286] The configurations of the first branch portion 41B, the second branch portion 42B, the third branch portion 43B, the terminal branch portion 44B, the first connecting portion 45B and the second connecting portion 46B are the same as those in the first conductive member 3A of the present embodiment described above (see Figures 53 to 56).

[0287] The relay portion 4aB extends from one side of the first connecting portion 45B in the y direction to the right in the x direction in the figure. The relay portion 4bB extends from the other side of the second connecting portion 46B in the y direction to the right in the x direction in the figure. The connecting portion 4cB connects the x-direction ends of the relay portion 4aB and the relay portion 4bB to each other. The relay portion 4dB extends from the center of the connecting portion 4cB in the y direction to the right in the x direction in the figure. The connecting portion 4eB extends from the x-direction end of the relay portion 4dB to one side in the y direction. The second relay portion 49B connects one y-direction end of the connecting portion 4eB to the other y-direction end of the terminal branch portion 44B. The positions in the z direction of relay portion 4aB, relay portion 4bB, connecting portion 4cB, relay portion 4dB, connecting portion 4eB and second relay portion 49B are located on one side in the z direction of joint portion 411B, joint portion 421B, joint portion 431B and joint portion 441B.

[0288] 52, the conduction path from the gate electrode 211A (see FIG. 27) of the first semiconductor element 21A to the first gate terminal 11D includes a path passing through a portion of the first coupling portion 35A, the relay portion 3aA, and the coupling portion 3cA, and a path passing through the first coupling portion 35A, the second coupling portion 36A, the relay portion 3bA, and the coupling portion 3cA, all connected in parallel to each other. Also, the conduction path from the gate electrode 221A (see FIG. 27) of the second semiconductor element 22A to the first gate terminal 11D includes a path passing through the first coupling portion 35A, the relay portion 3aA, and the coupling portion 3cA, and a path passing through the second coupling portion 36A, the relay portion 3bA, and the coupling portion 3cA, all connected in parallel to each other. Furthermore, the conduction path from gate electrode 231A of third semiconductor element 23A (see FIG. 27) to first gate terminal 11D includes a path passing through a portion of second connecting portion 36A, relay portion 3bA, and a portion of connecting portion 3cA, and a path passing through second connecting portion 36A, first connecting portion 35A, relay portion 3aA, and a portion of connecting portion 3cA, which are connected in parallel with each other. This makes it possible to reduce the difference in resistance value between gate electrode 211A, gate electrode 221A, and gate electrode 231A and first gate terminal 11D. Therefore, control voltages can be applied more uniformly to the plurality of first semiconductor elements 21A, second semiconductor elements 22A, and third semiconductor elements 23A.

[0289] The above-mentioned effects can also be achieved by the first conductive member 3B, the second conductive member 4A, and the second conductive member 4B. Ninth Embodiment 69 to 74 show first conductive members 3A, 3B according to a ninth embodiment of the present disclosure. The first conductive member 3A shown in FIGS. 69 to 71 further includes a third relay portion 30A in addition to the configuration of the first conductive member 3A (see FIG. 28) in the semiconductor device A1 described above. The third relay portion 30A is connected to one side portion of the first coupling portion 35A in the y direction and one side portion of the third coupling portion 37A in the y direction. The third relay portion 30A extends along the x direction. The position of the third relay portion 30A in the z direction is approximately the same as that of the first coupling portion 35A, the second coupling portion 36A, the third coupling portion 37A, and the first relay portion 38A.

[0290] The first relay portion 38A of this embodiment is a portion that connects a portion of the second connecting portion 36A and a portion of the third connecting portion 37A at the other side in the y direction. The length of the first relay portion 38A along the y direction (the width of the path through which current flows) is greater than the length of the third relay portion 30A along the y direction (the width of the path through which current flows). The third semiconductor element 23A that is farthest from the terminal branch portion 34A is disposed at the other side in the y direction (see FIG. 24), and the third branch portion 33A corresponding to the third semiconductor element 23A is connected to the first relay portion 38A. The first relay portion 38A extends a distance y1 from the end at the other side in the y direction toward the end at one side in the y direction (see FIG. 71).

[0291] In Fig. 71, dimension y1 is the dimension of the first link portion 38A in the y direction. Dimension y2 is the interval (distance) in the y direction between the third link portion 30A and the first branch portion 31A. For the purpose of uniforming the resistance, which will be described later, dimension y1 is preferably larger than dimension y2. More preferably, the ratio of dimension y1 to dimension y2 is 1.5 to 3.0:1.0, for example 2.5:1.0.

[0292] The first conductive member 3B shown in Figures 72 to 74 further includes a third relay portion 30B in addition to the configuration of the first conductive member 3B (see Figure 32) in the semiconductor device B1 described above. The third relay portion 30B is connected to one side portion of the first coupling portion 35B in the y direction and one side portion of the third coupling portion 37B in the y direction. The third relay portion 30B extends along the x direction. The position of the third relay portion 30B in the z direction is approximately the same as that of the first coupling portion 35B, the second coupling portion 36B, the third coupling portion 37B, and the first relay portion 38B.

[0293] The first relay portion 38B of this embodiment is a portion that connects a portion of the second connecting portion 36B and a portion of the third connecting portion 37B at the other side in the y direction. The length of the first relay portion 38B along the y direction (the width of the path through which current flows) is greater than the length of the third relay portion 30B along the y direction (the width of the path through which current flows). The third semiconductor element 23B that is farthest from the terminal branch portion 34B is disposed at the other side in the y direction (see FIG. 24), and the third branch portion 33B corresponding to the third semiconductor element 23B is connected to the first relay portion 38B. The first relay portion 38B extends a distance y1 from the end at the other side in the y direction toward the end at one side in the y direction (see FIG. 73).

[0294] In Fig. 73, dimension y1 is the dimension of the first link portion 38B in the y direction. Dimension y2 is the interval (distance) in the y direction between the third link portion 30B and the first branch portion 31B. For the purpose of uniforming the resistance, which will be described later, dimension y1 is preferably larger than dimension y2. More preferably, the ratio of dimension y1 to dimension y2 is 1.5 to 3.0:1.0, for example, 2.5:1.0.

[0295] According to this embodiment, the reduction in inductance allows a more uniform application of control voltage to the plurality of first semiconductor elements 21A, second semiconductor elements 22A, and third semiconductor elements 23A and the plurality of first semiconductor elements 21B, second semiconductor elements 22B, and third semiconductor elements 23B. Furthermore, the provision of third relay portions 30A and 30B in the first conductive members 3A and 3B reduces the electrical resistance of the conduction path from the first branch portions 31A and 31B to the terminal branch portions 34A and 34B. Furthermore, the provision of first relay portions 38A and 38B connects the farthest third branch portions 33A and 33B from the terminal branch portions 34A and 34B and has a large length along the y direction (the width of the path through which current flows). This reduces the electrical resistance of the conduction path from the third branch portions 33A and 33B to the terminal branch portions 34A and 34B. Furthermore, by making the dimension y1 larger than the dimension y2 and by setting the dimension y2 to an appropriate length, it is possible to prevent the electrical resistance value in the conductive path from the first branch portions 31A, 31B to the terminal branch portions 34A, 34B from becoming excessively small. As a result, it is possible to achieve uniform electrical resistance values ​​in the conductive path. To uniform the electrical resistance values ​​in the conductive paths from the first branch portions 31A, 31B, the second branch portions 32A, 32B, and the third branch portions 33A, 33B to the terminal branch portions 34A, 34B, respectively, it is preferable that the ratio of the dimension y1 to the dimension y2 be 1.5 to 3.0:1.0.

[0296] (Addendum) The technical ideas that can be understood from the above embodiments will be described below. (Appendix 1) a plurality of first switching elements each having a first element main surface and a first element back surface facing in opposite directions, each having a first control electrode and a first main surface drive electrode formed on the first element main surface, and a first back surface drive electrode formed on the first element back surface; a plurality of second switching elements each having a second element main surface and a second element back surface facing in opposite directions, the second switching elements each having a second control electrode and a second main surface drive electrode formed on the second element main surface, and a second back surface drive electrode formed on the second element back surface; a first die pad having a first main surface to which the first back surface drive electrodes of the first switching elements are connected; a second die pad having a second main surface facing the same direction as the first main surface, arranged in a direction parallel to the first main surface, and having the second back surface drive electrodes of the second switching elements connected to the second main surface; a first control lead spaced apart from the first die pad; a second control lead positioned away from the second die pad; a first control connection member that connects the first control electrodes of the plurality of first switching elements to the first control leads; a second control connection member that connects the second control electrodes of the second switching elements to the second control leads; Equipped with The first control connection member is a lead connection portion having a first end and a second end, the first end being connected to the first control lead; a plurality of first electrode connection portions connected between the second end of the lead connection portion and the first control electrodes of the plurality of first switching elements; and The second control connection member is a lead connection portion having a first end and a second end, the first end connected to the second control lead; a plurality of second electrode connection portions connected between the second end portion of the lead connection portion and the second control electrodes of the plurality of second switching elements; and the first electrode connection portions of the first control connection member have the same length; The second electrode connection portions of the second control connection member have the same length. Semiconductor device.

[0297] (Appendix 2) two of the first switching elements are connected to the first die pad; two second switching elements are connected to the second die pad; the second end of the lead connection portion of the first control connection member is located between two of the first switching elements; the second end of the lead connection portion of the second control connection member is located between two of the second switching elements; 2. The semiconductor device according to claim 1.

[0298] (Appendix 3) the second end of the lead connection portion of the first control connection member is disposed on a line connecting the first control electrodes of the two first switching elements, the first electrode connection portions of the first control connection member extend in opposite directions to each other, the second end of the lead connection portion of the second control connection member is disposed on a line connecting the second control electrodes of two of the second switching elements, The first electrode connection portions of the second control connection member extend in opposite directions to each other. 10. The semiconductor device according to claim 1 or 2.

[0299] (Appendix 4) a plurality of first switching elements each having a first element main surface and a first element back surface facing in opposite directions, each having a first control electrode and a first main surface drive electrode formed on the first element main surface, and a first back surface drive electrode formed on the first element back surface; a plurality of second switching elements each having a second element main surface and a second element back surface facing in opposite directions, the second switching elements each having a second control electrode and a second main surface drive electrode formed on the second element main surface, and a second back surface drive electrode formed on the second element back surface; a first die pad having a first main surface to which the first back surface drive electrodes of the first switching elements are connected; a second die pad having a second main surface facing the same direction as the first main surface, arranged in a direction parallel to the first main surface, and having the second back surface drive electrodes of the second switching elements connected to the second main surface; a first control lead spaced apart from the first die pad; a second control lead positioned away from the second die pad; a first control connection member that connects the first control electrodes of the plurality of first switching elements to the first control leads; a second control connection member that connects the second control electrodes of the second switching elements to the second control leads; Equipped with the first switching elements are arranged such that the first control electrodes are aligned in a first direction parallel to the first main surface; the second switching elements are arranged such that the second control electrodes are aligned in the first direction; The first control connection member is a first electrode connection portion that is linear and extends in the first direction and is connected to the first control electrodes of the plurality of first switching elements; a first lead connection portion arranged in parallel to the first electrode connection portion and connected to the first control lead; a first connecting portion that connects an end of the first electrode connecting portion opposite to the first control lead and an end of the first lead connecting portion; and The second control connection member is a second electrode connection portion that is linearly shaped and extends in the first direction and is connected to the second control electrodes of the second switching elements; a second lead connection portion arranged in parallel to the second electrode connection portion and connected to the second control lead; a second coupling portion that connects an end of the second electrode connecting portion opposite the second control lead to an end of the second lead connecting portion; The semiconductor device has:

[0300] (Appendix 5) the first coupling portion of the first control connection member overlaps with the first control electrode of the first switching element when viewed in a direction perpendicular to the first main surface; 5. The semiconductor device according to claim 4, wherein the second coupling portion of the second control connection member overlaps with the second control electrode of the second switching element when viewed in a direction perpendicular to the second main surface.

[0301] (Appendix 6) a plurality of first switching elements each having a first element main surface and a first element back surface facing in opposite directions, each having a first control electrode and a first main surface drive electrode formed on the first element main surface, and a first back surface drive electrode formed on the first element back surface; a plurality of second switching elements each having a second element main surface and a second element back surface facing in opposite directions, the second switching elements each having a second control electrode and a second main surface drive electrode formed on the second element main surface, and a second back surface drive electrode formed on the second element back surface; a first die pad having a first main surface to which the first back surface drive electrodes of the first switching elements are connected; a second die pad having a second main surface facing the same direction as the first main surface, arranged in a direction parallel to the first main surface, and having the second back surface drive electrodes of the second switching elements connected to the second main surface; a first control lead spaced apart from the first die pad; a second control lead positioned away from the second die pad; a first control connection member that connects the first control electrodes of the plurality of first switching elements to the first control leads; a second control connection member that connects the second control electrodes of the second switching elements to the second control leads; Equipped with the plurality of first switching elements include a first element, a second element, and a third element that are arranged so that the first control electrodes are aligned in a first direction parallel to the first main surface, and the second element and the third element are arranged so as to sandwich the first element; The first control connection member is a first lead connection portion connected to the first control lead; a first branch portion and a second branch portion connected to a tip of the first lead connection portion; a first connection portion connected between a tip of the first branch portion and the first control electrode of the first element; a second connection portion connected between a tip of the second branch portion and the first control electrode of the first element; a third connection portion connected between a tip of the first branch portion and the first control electrode of the second element; a fourth connection portion connected between a tip of the second branch portion and the first control electrode of the third element; and the plurality of second switching elements include a fourth element, a fifth element, and a sixth element that are arranged so that the second control electrodes are aligned in the first direction, and the fifth element and the sixth element are arranged so as to sandwich the fourth element; The second control connection member is a second lead connection portion connected to the second control lead; a third branch portion and a fourth branch portion connected to the tip of the second lead connection portion; a fifth connection portion connected between a tip of the third branch portion and the second control electrode of the fourth element; a sixth connection portion connected between a tip of the fourth branch portion and the second control electrode of the fourth element; a seventh connection portion connected between the tip of the third branch portion and the second control electrode of the fifth element; an eighth connection portion connected between a tip of the fourth branch portion and the second control electrode of the sixth element; The semiconductor device has:

[0302] (Appendix 7) 7. The semiconductor device according to claim 1, further comprising a first drive connection member that connects the first main surface drive electrodes of the plurality of first switching elements to the second main surface.

[0303] (Appendix 8) The semiconductor device includes: a first drive lead connected to the first die pad; a second drive lead spaced apart from the second die pad; an output lead connected to the second die pad; a second drive connection member that connects the second main surface drive electrode of the second switching element and the second drive lead; 8. The semiconductor device according to claim 1, further comprising:

[0304] (Appendix 9) a sealing resin covering a portion of the die pad and the switching elements, the sealing resin having a resin side surface facing in a direction parallel to the main surface; the first control lead, the second control lead, the first drive lead, the second drive lead, and the output lead protrude from the resin side surface and extend in a direction parallel to the main surface; 9. The semiconductor device according to claim 8.

[0305] (Appendix 10) a sealing resin covering a portion of the die pad and the switching elements, the sealing resin having a first resin side surface facing in a direction parallel to the main surface and a second resin side surface facing an opposite side to the first resin side surface; the first drive lead and the second drive lead protrude from the first resin side surface and extend in a direction parallel to the main surface; the first control lead and the second control lead protrude from the second resin side surface and extend in a direction parallel to the main surface; 9. The semiconductor device according to claim 8.

[0306] (Appendix 11) 11. The semiconductor device according to claim 10, wherein the output lead protrudes from the first resin side surface or the second resin side surface.

[0307] (Appendix 12) the plurality of first switching elements each include a first source electrode electrically connected to the first principal surface drive electrode; the second switching elements each include a second source electrode electrically connected to the second principal surface drive electrode; The semiconductor device includes: a first source lead disposed inside the first control lead; a second source lead disposed inside the second control lead; a first source connecting member that connects the first source electrode and the first source lead; a second source connecting member that connects the second source electrode and the second source lead; 12. The semiconductor device according to claim 1, comprising:

[0308] (Appendix 13) the first source connection member is connected to the first source electrode of one of the plurality of first switching elements; the second source connection member is connected to the second source electrode of one second switching element among the plurality of second switching elements; 13. The semiconductor device according to claim 12.

[0309] (Appendix 14) a die pad having a main surface; a plurality of switching elements each having a main surface and a rear surface facing opposite to each other, each having a control electrode and a main surface drive electrode formed on the main surface, and a rear surface drive electrode formed on the rear surface, the rear surface drive electrode being connected to the main surface; a control lead spaced apart from the die pad; a control connection member that connects the control electrodes of the plurality of switching elements to the control leads; Equipped with The control connection member is a lead connection portion having a first end and a second end, the first end being connected to the control lead; a plurality of electrode connection portions connected between the second end of the lead connection portion and the control electrodes of the plurality of switching elements; and The electrode connection parts have different lengths, and the widths of the electrode connection parts are set to become narrower as the lengths become longer. Semiconductor device.

[0310] (Appendix 15) 15. The semiconductor device according to claim 14, wherein the width of the electrode connection portion is set to be inversely proportional to the length thereof.

[0311] [Appendix 2-1] a first semiconductor element having a switching function and including a first control electrode; a second semiconductor element having a switching function and including a second control electrode; a third semiconductor element having a switching function and including a third control electrode; A control terminal; a first conductive member that electrically connects the first control electrode, the second control electrode, and the third control electrode to the control terminal, the first semiconductor element, the second semiconductor element, and the third semiconductor element are arranged in this order from one side to the other side in a first direction, the control terminal is disposed on the one side in the first direction with respect to the first semiconductor element, a first conductive member having a first branch portion joined to the first control electrode, a second branch portion joined to the second control electrode, a third branch portion joined to the third control electrode, and a terminal branch portion conductive to the control terminal, a first connecting portion connecting the first branch portion and the second branch portion, a second connecting portion connecting the second branch portion and the third branch portion, and a third connecting portion interposed between the third branch portion and the terminal branch portion;

[0312] [Appendix 2-2] The semiconductor device according to Supplementary Note 2-1, wherein the first coupling portion extends along the first direction.

[0313] [Appendix 2-3] The semiconductor device according to Supplementary Note 2-2, wherein the second coupling portion extends along the first direction.

[0314] [Appendix 2-4] The semiconductor device according to Supplementary Note 2-3, wherein the first connecting portion and the second connecting portion overlap each other when viewed along the first direction.

[0315] [Appendix 2-5] The semiconductor device according to claim 2-4, wherein the third coupling portion extends along the first direction.

[0316] [Appendix 2-6] The semiconductor device according to appendix 2-5, wherein the third connecting portion is spaced apart from the first connecting portion and the second connecting portion in a second direction perpendicular to the first direction.

[0317] [Appendix 2-7] The semiconductor device described in Appendix 2-6, wherein the first conductive member has a first relay portion that connects to the other side portion of the second connecting portion in the first direction and the other side portion of the third connecting portion in the first direction and extends along the second direction.

[0318] [Appendix 2-8] The semiconductor device described in Appendix 2-7, wherein the first conductive member has a second relay portion that connects to one side portion of the third connecting portion in the first direction and the other side portion of the terminal branch portion in the first direction and extends along the second direction.

[0319] [Appendix 2-9] The semiconductor device described in Appendix 2-8, wherein the area occupied by the control terminal in the second direction overlaps with the areas occupied by the first branch portion, the second branch portion, and the third branch portion in the second direction.

[0320] [Appendix 2-10] The semiconductor device according to any one of appendices 2-1 to 2-9, wherein the first conductive member is made of a metal plate material.

[0321] [Appendix 2-11] the first semiconductor element has a first main surface electrode; the second semiconductor element has a second principal surface electrode; the third semiconductor element has a third principal surface electrode; An auxiliary terminal; a second conductive member that electrically connects the first principal surface electrode, the second principal surface electrode, and the third principal surface electrode to the auxiliary terminal; the auxiliary terminal is disposed on the one side in the first direction with respect to the first semiconductor element, A semiconductor device according to any one of Appendices 2-6 to 2-9, wherein the second conductive member has a first branch portion joined to the first main surface electrode, a second branch portion joined to the second main surface electrode, a third branch portion joined to the third main surface electrode, and a terminal branch portion conductive to the auxiliary terminal, a first connecting portion connecting the first branch portion and the second branch portion, a second connecting portion connecting the second branch portion and the third branch portion, and a third connecting portion interposed between the third branch portion and the terminal branch portion.

[0322] [Appendix 2-12] The semiconductor device according to Appendix 2-11, wherein the first coupling portion of the second conductive member extends along the first direction.

[0323] [Appendix 2-13] The semiconductor device according to Appendix 2-12, wherein the second coupling portion of the second conductive member extends along the first direction.

[0324] [Appendix 2-14] The semiconductor device according to Appendix 2-13, wherein the first connecting portion and the second connecting portion overlap each other when viewed along the first direction.

[0325] [Appendix 2-15] The semiconductor device according to Appendix 2-14, wherein the third coupling portion of the second conductive member extends along the first direction.

[0326] [Appendix 2-16] The semiconductor device according to Appendix 2-15, wherein the third connecting portion of the second conductive member is spaced apart in the second direction from the first connecting portion and the second connecting portion of the second conductive member.

[0327] [Appendix 2-17] The semiconductor device described in Appendix 2-16, wherein the second conductive member has a first relay portion that connects the other side portion of the second connecting portion in the first direction and the other side portion of the third connecting portion in the first direction and extends along the second direction.

[0328] [Appendix 2-18] A semiconductor device described in Appendix 2-17, wherein the second conductive member has a second relay portion that connects to one side portion of the third connecting portion in the first direction and the other side portion of the terminal branch portion in the first direction and extends along the second direction.

[0329] [Appendix 2-19] The semiconductor device according to any one of appendices 2-1 to 2-18, wherein the first conductive member further includes a third relay portion connected to the first coupling portion and the third coupling portion.

[0330] [Appendix 2-20] The semiconductor device according to any one of the appendices, wherein the third relay portion is connected to a portion on one side in the first direction of the first connecting portion and a portion on one side in the first direction of the third connecting portion.

[0331] [Appendix 2-21] a first semiconductor element having a switching function and including a first control electrode; a second semiconductor element having a switching function and including a second control electrode; a third semiconductor element having a switching function and including a third control electrode; A control terminal; a first conductive member that electrically connects the first control electrode, the second control electrode, and the third control electrode to the control terminal, the first semiconductor element, the second semiconductor element, and the third semiconductor element are arranged in this order from one side to the other side in a first direction, the control terminal is disposed on the one side in the first direction with respect to the first semiconductor element, the first conductive member has a first branch portion, a second branch portion, a third branch portion, a terminal branch portion, a first connecting portion, a second connecting portion, a first relay portion, a second relay portion, a third connecting portion, a third relay portion, and a fourth connecting portion; the first branch portion is joined to the first control electrode; the second branch portion is joined to the second control electrode; the third branch portion is joined to the third control electrode, the terminal branch is electrically connected to the control terminal; the first connecting portion connects the first branch portion and the second branch portion, the second connecting portion connects the second branch portion and the third branch portion, the first relay portion extends from the first connecting portion in a second direction perpendicular to the first direction, the second relay portion extends from the second connecting portion in the second direction, the third connecting portion connects the first relay portion and the second relay portion, the third relay portion extends from the third connection portion in the second direction, The fourth connecting portion is interposed between the third relay portion and the terminal branch portion.

[0332] [Appendix 2-22] The semiconductor device according to Appendix 2-21, wherein the first coupling portion extends along the first direction.

[0333] [Appendix 2-23] The semiconductor device according to Appendix 2-22, wherein the second coupling portion extends along the first direction.

[0334] [Appendix 2-24] The semiconductor device according to Appendix 2-23, wherein the third coupling portion extends along the first direction.

[0335] [Appendix 2-25] The semiconductor device according to appendix 2-24, wherein the second coupling portion extends along the first direction.

[0336] [Appendix 3-1] a first semiconductor element having a switching function and including a first control electrode; a second semiconductor element having a switching function and including a second control electrode; a third semiconductor element having a switching function and including a third control electrode; A control terminal; a first conductive member that electrically connects the first control electrode, the second control electrode, and the third control electrode to the control terminal, the first semiconductor element, the second semiconductor element, and the third semiconductor element are arranged in this order from one side to the other side in a first direction, the control terminal is disposed on the one side in the first direction with respect to the first semiconductor element, a first conductive member having a first branch portion joined to the first control electrode, a second branch portion joined to the second control electrode, a third branch portion joined to the third control electrode, and a terminal branch portion conductive to the control terminal, a first connecting portion connecting the first branch portion and the second branch portion, a second connecting portion connecting the second branch portion and the third branch portion, and a third connecting portion interposed between the third branch portion and the terminal branch portion;

[0337] [Appendix 3-2] The semiconductor device according to Supplementary Note 3-1, wherein the first coupling portion extends along the first direction.

[0338] [Appendix 3-3] The semiconductor device according to Supplementary Note 3-2, wherein the second coupling portion extends along the first direction.

[0339] [Appendix 3-4] The semiconductor device according to Appendix 3-3, wherein the first connecting portion and the second connecting portion overlap each other when viewed along the first direction.

[0340] [Appendix 3-5] The semiconductor device according to Supplementary Note 3-4, wherein the third coupling portion extends along the first direction.

[0341] [Appendix 3-6] The semiconductor device according to appendix 3-5, wherein the third connecting portion is spaced apart from the first connecting portion and the second connecting portion in a second direction perpendicular to the first direction.

[0342] [Appendix 3-7] The semiconductor device described in Appendix 3-6, wherein the first conductive member has a first relay portion that connects to the other side portion of the second connecting portion in the first direction and the other side portion of the third connecting portion in the first direction and extends along the second direction.

[0343] [Appendix 3-8] A semiconductor device as described in Appendix 3-7, wherein the first conductive member has a second relay portion that connects to one side portion of the third connecting portion in the first direction and the other side portion of the terminal branch portion in the first direction and extends along the second direction.

[0344] [Appendix 3-9] The semiconductor device described in Appendix 3-8, wherein the area occupied by the control terminal in the second direction overlaps with the areas occupied by the first branch portion, the second branch portion, and the third branch portion in the second direction.

[0345] [Appendix 3-10] The semiconductor device according to any one of Supplementary Notes 3-1 to 3-9, wherein the first conductive member is made of a metal plate material.

[0346] [Appendix 3-11] the first semiconductor element has a first main surface electrode; the second semiconductor element has a second principal surface electrode; the third semiconductor element has a third principal surface electrode; An auxiliary terminal; a second conductive member that electrically connects the first principal surface electrode, the second principal surface electrode, and the third principal surface electrode to the auxiliary terminal; the auxiliary terminal is disposed on the one side in the first direction with respect to the first semiconductor element, A semiconductor device according to any one of Appendices 3-6 to 3-9, wherein the second conductive member has a first branch portion joined to the first main surface electrode, a second branch portion joined to the second main surface electrode, a third branch portion joined to the third main surface electrode, and a terminal branch portion conductive to the auxiliary terminal, a first connecting portion connecting the first branch portion and the second branch portion, a second connecting portion connecting the second branch portion and the third branch portion, and a third connecting portion interposed between the third branch portion and the terminal branch portion.

[0347] [Appendix 3-12] The semiconductor device according to Appendix 3-11, wherein the first coupling portion of the second conductive member extends along the first direction.

[0348] [Appendix 3-13] The semiconductor device according to Appendix 3-12, wherein the second coupling portion of the second conductive member extends along the first direction.

[0349] [Appendix 3-14] The semiconductor device according to claim 3-13, wherein the first connecting portion and the second connecting portion overlap each other when viewed along the first direction.

[0350] [Appendix 3-15] The semiconductor device according to Appendix 3-14, wherein the third coupling portion of the second conductive member extends along the first direction.

[0351] [Appendix 3-16] The semiconductor device described in Appendix 3-15, wherein the third connecting portion of the second conductive member is spaced apart in the second direction from the first connecting portion and the second connecting portion of the second conductive member.

[0352] [Appendix 3-17] The semiconductor device described in Appendix 3-16, wherein the second conductive member has a first relay portion that connects the other side portion of the second connecting portion in the first direction and the other side portion of the third connecting portion in the first direction and extends along the second direction.

[0353] [Appendix 3-18] A semiconductor device described in Appendix 3-17, wherein the second conductive member has a second relay portion that connects to one side portion of the third connecting portion in the first direction and the other side portion of the terminal branch portion in the first direction and extends along the second direction.

[0354] [Appendix 4-1] a die pad having a main surface; a plurality of switching elements each having a main surface and a rear surface facing opposite to each other, each having a control electrode and a main surface drive electrode formed on the main surface, and a rear surface drive electrode formed on the rear surface, the rear surface drive electrode being connected to the main surface; a control lead spaced apart from the die pad; a control connection member that connects the control electrodes of the plurality of switching elements to the control leads; Equipped with The control connection member is a lead connection portion having a first end and a second end, the first end being connected to the control lead; a plurality of electrode connection portions connected between the second end of the lead connection portion and the control electrodes of the plurality of switching elements; and The electrode connection portions have the same length. Semiconductor device.

[0355] [Appendix 4-2] Two of the switching elements are connected to the die pad, the second end of the lead connection portion is located between two of the switching elements; The semiconductor device according to claim 4-1.

[0356] [Appendix 4-3] the second end of the lead connection portion is disposed on a line connecting the control electrodes of the two switching elements, The plurality of electrode connection portions extend in opposite directions to each other. The semiconductor device according to claim 4-1 or 4-2.

[0357] [Appendix 4-4] a die pad having a main surface; a plurality of switching elements each including a main surface and a rear surface facing opposite directions, a control electrode and a main surface drive electrode formed on the main surface, and a rear surface drive electrode formed on the rear surface, the rear surface drive electrode being connected to the main surface; a control lead spaced apart from the die pad; a control connection member that connects the control electrodes of the plurality of switching elements to the control leads; Equipped with the switching elements are arranged such that the control electrodes are aligned in a first direction parallel to the main surface; The control connection member is an electrode connection portion that is linear and extends in the first direction and is connected to the control electrodes of the plurality of switching elements; a lead connection portion arranged in parallel with the electrode connection portion and connected to the control lead; a connecting portion that connects an end of the electrode connecting portion on the opposite side to the control lead and an end of the lead connecting portion; The semiconductor device has:

[0358] [Appendix 4-5] The semiconductor device according to Appendix 4-4, wherein the coupling portion overlaps with the control electrode of the switching element when viewed from a direction perpendicular to the main surface.

[0359] [Appendix 4-6] a die pad having a main surface; a plurality of switching elements each including a main surface and a rear surface facing opposite directions, a control electrode and a main surface drive electrode formed on the main surface, and a rear surface drive electrode formed on the rear surface, the rear surface drive electrode being connected to the main surface; a control lead spaced apart from the die pad; a control connection member that connects the control electrodes of the plurality of switching elements to the control leads; Equipped with the plurality of switching elements are arranged such that the control electrodes are aligned in a first direction parallel to the main surface, and include a first element, and a second element and a third element arranged on both sides of the first element in the first direction; The control connection member is a lead connection portion having a distal end and a proximal end, the proximal end being connected to the control lead; a first branch portion and a second branch portion connected to the tip of the lead connection portion; a first connection portion connected between a tip of the first branch portion and the control electrode of the first element; a second connection portion connected between a tip of the second branch portion and the control electrode of the first element; a third connection portion connected between the tip of the first branch portion and the control electrode of the second element; a fourth connection portion connected between the tip of the second branch portion and the control electrode of the third element; The semiconductor device has:

[0360] [Appendix 4-7] The first branch portion and the second branch portion have the same length, The first connection portion and the second connection portion have the same length, The third connection portion and the fourth connection portion have the same length. The semiconductor device according to claim 4-6.

[0361] [Appendix 4-8] the first branch portion and the first connection portion are arranged adjacent to each other and parallel to each other, The second branch portion and the second connection portion are arranged adjacent to each other and parallel to each other. The semiconductor device according to claim 4-6 or 4-7.

[0362] [Appendix 4-9] the die pad includes a first die pad having a first main surface and a second die pad having a second main surface facing the same direction as the first main surface and disposed in a second direction intersecting the first direction; the plurality of switching elements include a plurality of first switching elements connected to the first main surface and a plurality of second switching elements connected to the second main surface; the control leads include a first control lead and a second control lead; the control connection members include first control connection members that connect the control electrodes of the plurality of first switching elements to the first control lead, and second control connection members that connect the control electrodes of the plurality of second switching elements to the second control lead; A semiconductor device according to any one of Supplementary Notes 4-1 to 4-8.

[0363] [Appendix 4-10] The semiconductor device according to appendix 4-9, further comprising a first drive connection member that connects the main surface drive electrodes of the plurality of first switching elements to the second main surface.

[0364] [Appendix 4-11] The semiconductor device includes: a first drive lead connected to the first die pad; a second drive lead spaced apart from the second die pad; an output lead connected to the second die pad; a second drive connection member that connects the main surface drive electrode of the second switching element and the second drive lead; The semiconductor device according to claim 4-9 or 4-10, comprising:

[0365] [Appendix 4-12] a sealing resin that covers a portion of the first die pad and the second die pad, the plurality of first switching elements, and the plurality of second switching elements, and has resin side surfaces that face in a direction parallel to the first main surface and the second main surface; the first control lead, the second control lead, the first drive lead, the second drive lead, and the output lead protrude from the resin side surface and extend in a direction parallel to the main surface; The semiconductor device according to claim 4-11.

[0366] [Appendix 4-13] a sealing resin that covers the first die pad and a portion of the second die pad, the first switching elements, and the second switching elements, and that has a first resin side surface facing in a direction parallel to the first main surface and the second main surface, and a second resin side surface facing an opposite side to the first resin side surface; the first drive lead and the second drive lead protrude from the first resin side surface and extend in a direction parallel to the main surface; the first control lead and the second control lead protrude from the second resin side surface and extend in a direction parallel to the main surface; The semiconductor device according to claim 4-11.

[0367] [Appendix 4-14] The semiconductor device according to claim 4-13, wherein the output lead protrudes from the first resin side surface or the second resin side surface.

[0368] [Appendix 5-1] a die pad having a main surface, a device main surface and a device back surface facing opposite to each other, a plurality of switching elements each having a control electrode and a main surface drive electrode formed on the device main surface and a back surface drive electrode formed on the device back surface, the back surface drive electrode being connected to the main surface, control leads disposed apart from the die pad, and a control connection member connecting the control electrodes of the plurality of switching elements to the control leads, the control connection member having a first end and a second end, a lead connection portion having the first end connected to the control lead, and a plurality of electrode connection portions connected between the second end of the lead connection portion and the control electrodes of the plurality of switching elements, the plurality of electrode connection portions having the same length. Note that in this specification, "same" includes errors due to manufacturing variations and the like, and also includes cases where they do not exactly match.

[0369] According to this configuration, the electrical length between the control electrode and the control lead of each switching element is the same, so that variations in electrical characteristics such as inductance value and resistance value for each switching element are reduced.

[0370] [Appendix 5-2] a control connection member that connects the control electrodes of the plurality of switching elements to the control leads, a lead connection member that is arranged in a straight line in the first direction, the control electrodes being aligned in a first direction parallel to the main surface, the control connection member having an electrode connection portion that is connected to the control electrodes of the plurality of switching elements, a lead connection portion that is arranged in parallel to the electrode connection portion and connected to the control lead, and a coupling portion that connects an end of the electrode connection portion opposite the control lead to an end of the lead connection portion.

[0371] With this configuration, currents flow in opposite directions through the parallel lead connection part and electrode connection part, and the mutual inductance is reduced by the magnetic fields generated by the currents flowing through each part, thereby reducing the variation in inductance value for each switching element as an electrical characteristic.

[0372] [Appendix 5-3] a die pad having a main surface, an element main surface and an element back surface facing the opposite side, a control electrode and a main surface drive electrode formed on the element main surface, and a back surface drive electrode formed on the element back surface, wherein the back surface drive electrode is connected to the element main surface, a control lead arranged away from the die pad, and a control connection member connecting the control electrodes of the plurality of switching elements to the control leads, the plurality of switching elements being arranged so that the control electrodes are aligned in a first direction parallel to the main surface, and a first element and a second element arranged on both sides of the first element in the first direction a first element and a third element, wherein the control connection member has a lead connection portion having a tip and a base end, the base end being connected to the control lead, a first branch portion and a second branch portion connected to the tip of the lead connection portion, a first connection portion connected between the tip of the first branch portion and the control electrode of the first element, a second connection portion connected between the tip of the second branch portion and the control electrode of the first element, a third connection portion connected between the tip of the first branch portion and the control electrode of the second element, and a fourth connection portion connected between the tip of the second branch portion and the control electrode of the third element.

[0373] According to this configuration, the difference in resistance between the control electrode and the control lead of each switching element is reduced, and therefore the variation in the resistance of each switching element as an electrical characteristic is reduced.

[0374] [Appendix 6-1] a first die pad having a first main surface; a second die pad having a second main surface facing the same direction as the first main surface and disposed in a second direction intersecting a first direction parallel to the first main surface and the second main surface; a plurality of first switching elements each having a main surface and a rear surface facing opposite to each other, each having a control electrode and a main surface drive electrode formed on the main surface, and a rear surface drive electrode formed on the rear surface, the rear surface drive electrode being connected to the first main surface; a plurality of second switching elements each having a main surface and a rear surface facing opposite to each other, each having a control electrode and a main surface drive electrode formed on the main surface, and a rear surface drive electrode formed on the rear surface, the rear surface drive electrode being connected to the second main surface; a first control lead spaced apart from the first die pad; a second control lead positioned away from the second die pad; a first drive lead connected to the first die pad; a second drive lead spaced apart from the second die pad; an output lead connected to the second die pad; a first control connection member that connects the control electrodes of the plurality of first switching elements to the first control leads; a second control connection member that connects the control electrodes of the second switching elements to the second control leads; a first drive connection member that connects the main surface drive electrodes of the plurality of first switching elements to the second main surface; a second drive connection member that connects the main surface drive electrodes of the second switching elements to the second drive leads; a sealing resin that covers the first die pad, a portion of the second die pad, the first switching elements, and the second switching elements, and has resin side surfaces that face in a direction parallel to the first main surface and the second main surface; Equipped with The first control connection member is a first lead connection portion having a first end and a second end, the first end being connected to the first control lead; a plurality of first electrode connection portions connected between the second end of the first lead connection portion and the control electrodes of the plurality of first switching elements; and The second control connection member is a second lead connection portion having a first end and a second end, the first end being connected to the second control lead; a plurality of second electrode connection portions connected between the second end portion of the second lead connection portion and the control electrodes of the plurality of second switching elements; and The first electrode connection portions have the same length, The plurality of second electrode connection portions have the same length, the first control lead, the second control lead, the first drive lead, the second drive lead, and the output lead protrude from the resin side surface and extend in a direction parallel to the first main surface and the second main surface, When viewed from the first direction, the second drive lead is disposed between the first drive lead and the output lead. Semiconductor device.

[0375] [Appendix 6-2] two of the first switching elements are connected to the first die pad; two second switching elements are connected to the second die pad; the second end of the first lead connection portion is located between two of the first switching elements; the second end of the second lead connection portion is located between two of the second switching elements; The semiconductor device according to claim 6-1.

[0376] [Appendix 6-3] the second end of the first lead connection portion is disposed on a line connecting the control electrodes of two of the first switching elements, the second end of the second lead connection portion is disposed on a line connecting the control electrodes of two of the second switching elements, the first electrode connection portions extend in opposite directions to each other, The second electrode connection portions extend in opposite directions to each other. The semiconductor device according to claim 6-1 or 6-2.

[0377] [Appendix 6-4] a first die pad having a first main surface; a second die pad having a second main surface facing the same direction as the first main surface and disposed in a second direction intersecting a first direction parallel to the first main surface and the second main surface; a plurality of first switching elements each including a main surface and a back surface facing opposite directions, a control electrode and a main surface drive electrode formed on the main surface, and a back surface drive electrode formed on the back surface of the element, the back surface drive electrode being connected to the first main surface; a plurality of second switching elements each including a main surface and a back surface facing opposite directions, a control electrode and a main surface drive electrode formed on the main surface, and a back surface drive electrode formed on the back surface of the element, the back surface drive electrode being connected to the second main surface; a first control lead spaced apart from the first die pad; a second control lead positioned away from the second die pad; a first drive lead connected to the first die pad; a second drive lead spaced apart from the second die pad; an output lead connected to the second die pad; a first control connection member that connects the control electrodes of the plurality of first switching elements to the first control leads; a second control connection member that connects the control electrodes of the second switching elements to the second control leads; a first drive connection member that connects the main surface drive electrodes of the plurality of first switching elements to the second main surface; a second drive connection member that connects the main surface drive electrodes of the second switching elements to the second drive leads; a sealing resin that covers the first die pad, a portion of the second die pad, the first switching elements, and the second switching elements, and has resin side surfaces that face in a direction parallel to the first main surface and the second main surface; Equipped with the first switching elements are arranged such that the control electrodes are aligned in the first direction; the second switching elements are arranged such that the control electrodes are aligned in the first direction; The first control connection member is a first electrode connection portion that is linear and extends in the first direction and is connected to the control electrodes of the plurality of first switching elements; a first lead connection portion arranged in parallel to the first electrode connection portion and connected to the first control lead; a first connecting portion that connects an end of the first electrode connecting portion opposite to the first control lead and an end of the first lead connecting portion; and The second control connection member is a second electrode connection portion that is linear and extends in the first direction and is connected to the control electrodes of the second switching elements; a second lead connection portion arranged in parallel to the second electrode connection portion and connected to the second control lead; a second coupling portion that connects an end of the second electrode connecting portion opposite the second control lead to an end of the second lead connecting portion; and the first control lead, the second control lead, the first drive lead, the second drive lead, and the output lead protrude from the resin side surface and extend in a direction parallel to the first main surface and the second main surface, When viewed from the first direction, the second drive lead is disposed between the first drive lead and the output lead. Semiconductor device.

[0378] [Appendix 6-5] the first coupling portion overlaps with the control electrode of the first switching element when viewed in a direction perpendicular to the first main surface, the second coupling portion overlaps with the control electrode of the second switching element when viewed in a direction perpendicular to the second main surface. The semiconductor device according to claim 6-4.

[0379] [Appendix 6-6] a first die pad having a first main surface; a second die pad having a second main surface facing the same direction as the first main surface and disposed in a second direction intersecting a first direction parallel to the first main surface and the second main surface; a plurality of first switching elements each including a main surface and a back surface facing opposite directions, a control electrode and a main surface drive electrode formed on the main surface, and a back surface drive electrode formed on the back surface of the element, the back surface drive electrode being connected to the first main surface; a plurality of second switching elements each including a main surface and a back surface facing opposite directions, a control electrode and a main surface drive electrode formed on the main surface, and a back surface drive electrode formed on the back surface of the element, the back surface drive electrode being connected to the second main surface; a first control lead spaced apart from the first die pad; a second control lead positioned away from the second die pad; a first drive lead connected to the first die pad; a second drive lead spaced apart from the second die pad; an output lead connected to the second die pad; a first control connection member that connects the control electrodes of the plurality of first switching elements to the first control leads; a second control connection member that connects the control electrodes of the second switching elements to the second control leads; a first drive connection member that connects the main surface drive electrodes of the plurality of first switching elements to the second main surface; a second drive connection member that connects the main surface drive electrodes of the second switching elements to the second drive leads; a sealing resin that covers the first die pad, a portion of the second die pad, the first switching elements, and the second switching elements, and has resin side surfaces that face in a direction parallel to the first main surface and the second main surface; Equipped with the plurality of first switching elements are arranged such that the control electrodes are aligned in the first direction, and include a first element, and a second element and a third element arranged on both sides of the first element in the first direction; The first control connection member is a first lead connection portion having a distal end and a proximal end, the proximal end being connected to the first control lead; a first branch portion and a second branch portion connected to a tip of the first lead connection portion; a first connection portion connected between a tip of the first branch portion and the control electrode of the first element; a second connection portion connected between a tip of the second branch portion and the control electrode of the first element; a third connection portion connected between the tip of the first branch portion and the control electrode of the second element; a fourth connection portion connected between the tip of the second branch portion and the control electrode of the third element; and the second switching elements are arranged such that the control electrodes are aligned in the first direction, and include a fourth element, and a fifth element and a sixth element arranged on both sides of the fourth element in the first direction; The second control connection member is a second lead connection portion having a distal end and a proximal end, the proximal end being connected to the second control lead; a third branch portion and a fourth branch portion connected to the tip of the second lead connection portion; a fifth connection portion connected between the tip of the third branch portion and the control electrode of the fourth element; a sixth connection portion connected between the tip of the fourth branch portion and the control electrode of the fourth element; a seventh connection portion connected between the tip of the third branch portion and the control electrode of the fifth element; an eighth connection portion connected between the tip of the fourth branch portion and the control electrode of the sixth element; and the first control lead, the second control lead, the first drive lead, the second drive lead, and the output lead protrude from the resin side surface and extend in a direction parallel to the first main surface and the second main surface, When viewed from the first direction, the second drive lead is disposed between the first drive lead and the output lead. Semiconductor device.

[0380] [Appendix 6-7] The first branch portion and the second branch portion have the same length, The first connection portion and the second connection portion have the same length, The third connection portion and the fourth connection portion have the same length, The third branch portion and the fourth branch portion have the same length, The fifth connection portion and the sixth connection portion have the same length, The seventh connection portion and the eighth connection portion have the same length. The semiconductor device according to claim 6-6.

[0381] [Appendix 6-8] the first branch portion and the first connection portion are arranged adjacent to each other and parallel to each other, the second branch portion and the second connection portion are arranged adjacent to each other and parallel to each other, the third branch portion and the fifth connection portion are arranged adjacent to each other and parallel to each other, The fourth branch portion and the sixth connection portion are arranged adjacent to each other and parallel to each other. The semiconductor device according to claim 6-6 or 6-7.

[0382] [Appendix 6-9] the sealing resin has, as the resin side surface, a first resin side surface facing in a direction parallel to the first main surface and the second main surface, and a second resin side surface facing in a direction opposite to the first resin side surface, the first drive lead and the second drive lead protrude from the first resin side surface and extend in a direction parallel to the first main surface and the second main surface, the first control lead and the second control lead protrude from the second resin side surface and extend in a direction parallel to the first main surface and the second main surface; A semiconductor device according to any one of Supplementary Notes 6-1 to 6-8.

[0383] [Appendix 6-10] The semiconductor device according to claim 6-9, wherein the output lead protrudes from the first resin side surface or the second resin side surface.

[0384] [Appendix 6-11] When viewed from the first direction, the first drive lead, the output lead, and the second drive lead are disposed between the first control lead and the second control lead. A semiconductor device according to any one of Supplementary Notes 6-1 to 6-8.

[0385] [Appendix 6-12] On the resin side surface from which the first drive lead, the second drive lead, and the output lead protrude, recesses are provided between the first drive lead and the second drive lead and between the second drive lead and the output lead when viewed in the thickness direction of the sealing resin. A semiconductor device according to any one of Supplementary Notes 6-1 to 6-11. [Explanation of symbols]

[0386] A10, A11, A20, A30, A31, A40, A50, A60...semiconductor device, 11...first die pad, 111...main surface, 12...second die pad, 121...main surface, 21...first control lead, 22...first source lead, 23...first drive lead, 24...second drive lead, 25...output lead, 26...second source lead, 27...second control lead, 30a...first switching element (second element), 30b...first switching element (first element), 30c...first switching element (third element), 301...first element main surface, 302...first element back surface, 31...first main surface drive electrode, 311...main source electrode, 312... Source electrode, 32...first control electrode, 33...first rear surface drive electrode, 40a...second switching element (fifth element), 40b...second switching element (fourth element), 40c...second switching element (sixth element), 401...second element main surface, 402...second element rear surface, 41...second main surface drive electrode, 411...main source electrode, 412...source electrode, 42...second control electrode, 43...second rear surface drive electrode, 51, 51a...first control connection member, 511...lead connection portion, 512a...electrode connection portion, 512b...electrode connection portion, 513...lead connection portion, 514...electrode connection portion, 514a...electrode connection portion, 514b...electrode connection portion, 52,52a...source connecting member, 521...lead connecting portion, 522a...electrode connecting portion, 522b...electrode connecting portion, 53...first driving connecting member, 54...second driving connecting member, 541...lead connecting portion, 542...electrode connecting portion, 543...connecting portion, 561...lead connecting portion, 562a...electrode connecting portion, 562b...electrode connecting portion, 57...second control connecting member, 571...lead connecting portion, 572a...electrode connecting portion, 572b...electrode connecting portion, 61...first control connecting member, 611...lead connecting portion (first lead connecting portion), 612...connecting portion (first connecting portion), 613...electrode connecting portion (first electrode connecting portion), 63...first driving Actuating connection member, 64...second driving connection member, 67...second control connection member, 671...lead connection portion (second lead connection portion), 672...connection portion (second connection portion), 673...electrode connection portion (second electrode connection portion), 71...first control connection member, 71a...first control connection member, 721...first branch portion, 722...second branch portion, 731...first connection portion, 732...second connection portion, 733...third connection portion, 734...fourth connection portion, 741...electrode connection portion, 742...electrode connection portion, 743...electrode connection portion, 75...second control connection member, 75a...second control connection member, 781-783...electrode connection portion, 90...sealing resin, X...horizontal direction, Y... longitudinal direction, Z... thickness direction, A1, A2... semiconductor device, 1A... first lead, 1B... second lead, 1C... third lead, 1D... fourth lead, 1E... fifth lead, 1F... sixth lead, 1G... seventh lead, 3A, 3B... first conductive member, 4A, 4B... second conductive member, 5... third conductive member, 6... fourth conductive member, 3aA, 3aB, 3bA, 3bB, 3dA, 3dB, 4aA, 4aB, 4bA, 4bB, 4dA, 4dB... relay portion, 3cA, 3cB, 3eA, 3eB, 4cA, 4cB, 4eA, 4eB... connecting portion, 7... sealing resin, 10... semiconductor element, 10A, 10B... eye Land portion, 11A...output terminal, 11B...positive power supply input terminal, 11C...negative power supply input terminal, 11D...first gate terminal (control terminal), 11E...first source sense terminal (auxiliary terminal), 11F...second gate terminal (control terminal), 11G...second source sense terminal (auxiliary terminal), 12A, 12B, 13C, 13D, 13F...intermediate portion, 12C, 12D, 12E, 12F, 12G...junction portion, 21A, 21B...first semiconductor element, 22A, 22B...second semiconductor element, 23A, 23B...third semiconductor element, 31A, 31B, 41A, 41B, 51C, 61C...first branch portion, 32A, 32B,42A, 42B, 52C, 62C… Second branch, 33A, 33B, 43A, 43B, 53C, 63C… Third branch, 34A, 34B, 44A, 44B, 54C… Terminal branch, 35A, 35B, 45A, 45B… First connecting part, 36A, 36B, 46A, 46B… Second connecting part, 37A, 37B, 47A, 47B… Third connecting part, 38A, 38B, 48A, 4 8B…First intermediate branch, 39A, 39B, 49A, 49B…Second intermediate branch, 30A, 30B…Third intermediate branch, 64C…Intermediate branch, 65C…Connecting part, 71C…Main surface, 72C…Inside, 73C…First side surface, 74C…Second side surface, 92, 93…Conductive bonding material, 211A, 211B, 221A, 221B, 231A, 231B…Gate electrode, 212A, 212B, 22 2A, 222B, 232A, 232B… Sort electrodes; 213A, 213B, 223A, 223B, 233A, 233B… Dressing electrodes; 311A, 311B, 321A, 321B, 331A, 331B, 341A, 341B, 411A, 411B, 421A, 421B, 431A, 431B, 441A, 441B, 511C, 521C, 531 C,541C,611C,621C,631C,641C…joints, 312A,312B,322A,322B,332A,332B,342A,342B,412A,412B,422A,422B,432A,432B,442A,442B,512C,522C,532C,542C,612C,622C,632C,642C…sloping portions.

Claims

1. a first semiconductor element having a switching function and including a first control electrode; a second semiconductor element having a switching function and including a second control electrode; a third semiconductor element having a switching function and including a third control electrode; A control terminal; a first conductive member that electrically connects the first control electrode, the second control electrode, and the third control electrode to the control terminal, the first semiconductor element, the second semiconductor element, and the third semiconductor element are arranged in this order from one side to the other side in a first direction, the control terminal is disposed on the one side in the first direction with respect to the first semiconductor element, a first conductive member having a first branch portion joined to the first control electrode, a second branch portion joined to the second control electrode, a third branch portion joined to the third control electrode, and a terminal branch portion conductive to the control terminal, a first connecting portion connecting the first branch portion and the second branch portion, a second connecting portion connecting the second branch portion and the third branch portion, and a third connecting portion interposed between the third branch portion and the terminal branch portion;

2. The semiconductor device according to claim 1 , wherein the first coupling portion extends along the first direction.

3. The semiconductor device according to claim 2 , wherein the second coupling portion extends along the first direction.

4. The semiconductor device according to claim 3 , wherein the first connecting portion and the second connecting portion overlap each other when viewed along the first direction.

5. The semiconductor device according to claim 4 , wherein the third coupling portion extends along the first direction.

6. The semiconductor device according to claim 5 , wherein the third connecting portion is spaced apart from the first connecting portion and the second connecting portion in a second direction perpendicular to the first direction.

7. 7. The semiconductor device according to claim 6, wherein the first conductive member has a first relay portion that is connected to the other side portion of the second connecting portion in the first direction and the other side portion of the third connecting portion in the first direction and extends along the second direction.

8. 8. The semiconductor device according to claim 7, wherein the first conductive member has a second relay portion that connects to a portion of the third connecting portion on one side in the first direction and a portion of the terminal branch portion on the other side in the first direction and extends along the second direction.

9. 9. The semiconductor device according to claim 8, wherein an area occupied by said control terminal in said second direction overlaps with areas occupied by said first branch portion, said second branch portion, and said third branch portion in said second direction.

10. 10. The semiconductor device according to claim 1, wherein the first conductive member is made of a metal plate material.

11. the first semiconductor element has a first main surface electrode; the second semiconductor element has a second principal surface electrode; the third semiconductor element has a third principal surface electrode; An auxiliary terminal; a second conductive member that electrically connects the first principal surface electrode, the second principal surface electrode, and the third principal surface electrode to the auxiliary terminal; the auxiliary terminal is disposed on the one side in the first direction with respect to the first semiconductor element, The semiconductor device according to any one of claims 6 to 9, wherein the second conductive member has a first branch portion joined to the first main surface electrode, a second branch portion joined to the second main surface electrode, a third branch portion joined to the third main surface electrode, and a terminal branch portion conductive to the auxiliary terminal, a first connecting portion connecting the first branch portion and the second branch portion, a second connecting portion connecting the second branch portion and the third branch portion, and a third connecting portion interposed between the third branch portion and the terminal branch portion.

12. The semiconductor device according to claim 11 , wherein the first coupling portion of the second conductive member extends along the first direction.

13. The semiconductor device according to claim 12 , wherein the second coupling portion of the second conductive member extends along the first direction.

14. The semiconductor device according to claim 13 , wherein the first connecting portion and the second connecting portion overlap each other when viewed along the first direction.

15. The semiconductor device according to claim 14 , wherein the third coupling portion of the second conductive member extends along the first direction.

16. The semiconductor device according to claim 15 , wherein the third coupling portion of the second conductive member is spaced apart from the first coupling portion and the second coupling portion of the second conductive member in the second direction.

17. 17. The semiconductor device according to claim 16, wherein the second conductive member has a first relay portion that connects to the other side portion of the second connecting portion in the first direction and the other side portion of the third connecting portion in the first direction and extends along the second direction.

18. 18. The semiconductor device according to claim 17, wherein the second conductive member has a second relay portion that connects to a portion of the third connecting portion on one side in the first direction and a portion of the terminal branch portion on the other side in the first direction and extends along the second direction.

19. 19. The semiconductor device according to claim 1, wherein the first conductive member further includes a third relay portion connected to the first coupling portion and the third coupling portion.

20. The semiconductor device according to claim 19 , wherein the third relay portion is connected to a portion of the first coupling portion on one side in the first direction and a portion of the third coupling portion on one side in the first direction.

21. a first semiconductor element having a switching function and including a first control electrode; a second semiconductor element having a switching function and including a second control electrode; a third semiconductor element having a switching function and including a third control electrode; A control terminal; a first conductive member that electrically connects the first control electrode, the second control electrode, and the third control electrode to the control terminal, the first semiconductor element, the second semiconductor element, and the third semiconductor element are arranged in this order from one side to the other side in a first direction, the control terminal is disposed on the one side in the first direction with respect to the first semiconductor element, the first conductive member has a first branch portion, a second branch portion, a third branch portion, a terminal branch portion, a first connecting portion, a second connecting portion, a first relay portion, a second relay portion, a third connecting portion, a third relay portion, and a fourth connecting portion; the first branch portion is joined to the first control electrode; the second branch portion is joined to the second control electrode; the third branch portion is joined to the third control electrode, the terminal branch is electrically connected to the control terminal; the first connecting portion connects the first branch portion and the second branch portion, the second connecting portion connects the second branch portion and the third branch portion, the first relay portion extends from the first connecting portion in a second direction perpendicular to the first direction, the second relay portion extends from the second connecting portion in the second direction, the third connecting portion connects the first relay portion and the second relay portion, the third relay portion extends from the third connecting portion in the second direction, The fourth connecting portion is interposed between the third relay portion and the terminal branch portion.

22. The semiconductor device according to claim 21 , wherein the first coupling portion extends along the first direction.

23. The semiconductor device according to claim 22 , wherein the second coupling portion extends along the first direction.

24. The semiconductor device according to claim 23 , wherein the third coupling portion extends along the first direction.

25. The semiconductor device according to claim 24 , wherein the fourth coupling portion extends along the first direction.

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