Coil components

Abstract

The present disclosure provides a coil part that can achieve a required characteristic. The present disclosure includes a plurality of coils in a rectangular laminate (3). A coil part (1) comprises a plurality of external electrodes, a coil (Lp1), and coils (L1 to L3). The coil (Lp1) includes a plurality of conductive patterns (10) and via conductors (51, 52). In a view from the layering direction, when the laminate (3) is divided in the longitudinal direction thereof into a first region (A) and a second region (B) by a bisecting line (D), the coil (Lp1) is located in the first region (A). In a view from the layering direction, straight lines that respectively connect the via conductors (51, 52) with a first external electrode (41) and a fourth external electrode (44) at the minimum distances therebetween cross an open region of the coil (Lp1).

Description

Technical Field

[0001] The present disclosure relates to coil components.

Background Art

[0002] In recent years, in electronic devices, wireless technology has advanced and power consumption in electronic circuits has increased. In particular, RF circuits are known to consume a large amount of power for transmitting, receiving, and processing RF communication signals. Therefore, circuits using a divider circuit have been proposed to reduce power consumption (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When realizing a coil component including a coil such as a divider circuit as a multilayer electronic component, depending on the arrangement of coils, capacitors, etc. formed inside the multilayer electronic component, parasitic capacitance may occur between the coils, capacitors, etc. and the electrodes. There was a risk that the required characteristics could not be obtained with a coil component having parasitic capacitance.

[0005] Therefore, an object of the present disclosure is to provide a coil component capable of obtaining required characteristics.

Means for Solving the Problems

[0006] A coil component according to one embodiment of the present disclosure is a coil component comprising a plurality of coils in a rectangular parallelepiped laminate. The coil component comprises first to fourth external electrodes formed at the four corners of the laminate, at least a portion of which is formed on the side surface of the laminate; a first coil conductor whose winding axis is in the lamination direction of the laminate; and a second coil conductor formed at a position that does not overlap with the first coil conductor when viewed from the lamination direction, and whose winding axis is in the lamination direction. The first coil conductor comprises a plurality of conductor patterns laminated with an insulating layer in between, and connecting conductors for electrically connecting the plurality of conductor patterns. And, a connection portion formed at the end of multiple conductor patterns that electrically connects with the connecting conductor. Including the above, when viewed from the stacking direction, the stack is divided into a first region and a second region by a line bisecting the longitudinal direction of the stack, the first coil conductor is located in the first region, and the side closer to the first and fourth external electrodes located in the first region is designated as the first conductor, and the side further away from the first and fourth external electrodes is designated as the second conductor. Connection part at least one of the following Connection part It is provided on the second conductor, and when viewed from the stacking direction, the second conductor Connection part provided The straight line connecting the first external electrode and the fourth external electrode with the minimum distance traverses the opening region of the first coil conductor. [Effects of the Invention]

[0007] According to one embodiment of this disclosure, when viewed from the stacking direction, the straight line connecting the connecting conductor and the external electrode at the minimum distance crosses the opening region of the first coil conductor. This allows the first coil conductor and the external electrode to be separated, suppressing parasitic capacitance generated between the first coil conductor and the external electrode, and enabling the acquisition of the characteristics required for a coil component. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of a coil component according to an embodiment. [Figure 2] This is a plan view of a coil component according to an embodiment. [Figure 3] This is an equivalent circuit diagram of a coil component according to an embodiment. [Figure 4] This is a plan view illustrating the first coil conductor of the coil component being compared. [Figure 5] This is an equivalent circuit diagram of the coil component being compared. [Figure 6] This is a first exploded plan view showing the configuration of the coil component according to the embodiment. [Figure 7] This is a second exploded plan view showing the configuration of the coil component according to the embodiment. [Figure 8] This is a third exploded plan view showing the configuration of the coil component according to the embodiment. [Modes for carrying out the invention]

[0009] The coil components according to the embodiment will be described below. First, the coil component according to the embodiment will be described with reference to the drawings. Figure 1 is a perspective view of the coil component according to the embodiment. Figure 2 is a plan view of the coil component according to the embodiment. Figure 3 is an equivalent circuit diagram of the coil component according to the embodiment. Here, in Figures 1 and 2, the short side direction of the coil component 1 is the X direction, the long side direction is the Y direction, and the height direction is the Z direction. Also, the stacking direction of the substrate is the Z direction, and the direction of the arrow indicates the upper layer direction.

[0010] Coil component 1 is, for example, a divider circuit in which a first coil conductor that does not constitute a transformer and a second coil conductor that constitutes a transformer are arranged adjacent to each other. In the following embodiment, a divider circuit is used as the configuration of coil component 1 for explanation, but the coil component is not limited to a divider circuit, and a coil component with a similar configuration can be applied as long as it contains multiple coils in a rectangular parallelepiped laminate.

[0011] First, as shown in Figure 3, coil component 1 includes a capacitor Cp1 and a coil Lp1 (first coil conductor) that constitute an LC resonator, coils L1 to L3 (second coil conductors) that constitute a transformer section, and capacitors CL1 and CL2. Coil component 1 has a transformer section connected after the LC resonator connected to the input terminal IN, and output terminals OUT1 connected to capacitor CL1 and OUT2 connected to capacitor CL2 after the transformer section.

[0012] The coil component 1 is composed of a laminate 3, which is made up of multiple substrates on which coil and capacitor wiring is formed, as shown in Figures 1 and 2. The laminate 3 may be manufactured, for example, by a method of forming electrode patterns using a photomask with a photosensitive conductive paste and a photosensitive insulating paste. Alternatively, it may be manufactured by a method of laminating ceramic green sheets using a process of forming electrode patterns by screen printing or a process of making holes in an insulating layer with a laser and filling them with via electrodes. The laminate 3 has a pair of main surfaces facing each other and side surfaces connecting the main surfaces. internal Multiple conductor patterns 10 for the capacitor Cp1 and coil Lp1 that constitute the LC resonator, multiple conductor patterns 20 for the coils L1 to L3 that constitute the transformer section, and multiple conductor patterns 30 for the capacitor CL1 are formed and stacked in the Z direction. Note that capacitor CL2 is stacked on top of coil Lp1 as will be described later, but it is not shown in Figures 1 and 2.

[0013] At the four corners of the laminate 3, there are the first external electrode 41 which constitutes the input terminal IN, the second external electrode 42 which constitutes the GND terminal, the third external electrode 43 which constitutes the output terminal OUT1, and the fourth external electrode 44 which constitutes the output terminal OUT2. Note that the first to fourth external electrodes 41 to 44 do not need to be formed at the four corners of the laminate 3, but may be formed around the outer perimeter of the laminate 3. Also, there are not limited to four external electrodes formed around the outer perimeter of the laminate 3, but may be multiple.

[0014] The coil Lp1 is formed near the first external electrode 41 and the fourth external electrode 44, and its winding axis is in the stacking direction. A capacitor Cp1 is formed in the lower layer of the multiple conductor patterns 10, and the coil Lp1 is formed in the upper layer. Via conductors 51 and 52 (connecting conductors) are provided to electrically connect the multiple conductor patterns 10 that make up the coil Lp1.

[0015] As shown in FIG. 2, the via conductors 51 and 52 are provided on the sides of the sides of the coil Lp1 parallel to the short side direction (X direction) of the laminate 3 as viewed from the stacking direction, not on the sides of the first external electrode 41 and the fourth external electrode 44, but on the sides of the conductor pattern 20. That is, the via conductors 51 and 52 are provided at positions separated from the first external electrode 41 and the fourth external electrode 44.

[0016] Here, coil components with different arrangements of the via conductors 51 and 52 will be described. FIG. 4 is a plan view for explaining the first coil conductor of the coil component according to the comparison target. FIG. 5 is an equivalent circuit diagram of the coil component according to the comparison target. In the coil component 1A shown in FIG. 4, the via conductors 51 and 52 are provided on the sides of the first external electrode 41 and the fourth external electrode 44. Since the coil component 1A has the same configuration as the coil component 1 shown in FIG. 1 except for the positions where the via conductors 51 and 52 are provided, the same reference numerals are given to the same configurations and the detailed description will not be repeated.

[0017] In the coil component 1A, as shown in FIG. 4, the coil Lp1 of the LC resonator is arranged at a position adjacent to the first external electrode 41 and the fourth external electrode 44, and the via conductors 51 and 52 of the coil Lp1 are arranged at the positions closest to the first external electrode 41 and the fourth external electrode 44. When the via conductors 51 and 52 are provided on the sides of the first external electrode 41 and the fourth external electrode 44, a parasitic capacitance Cs1 is formed between the via conductor 51 and the first external electrode 41, and a parasitic capacitance Cs2 is formed between the via conductor 52 and the fourth external electrode 44 as shown in FIG. 5. Due to the generation of the parasitic capacitances Cs1 and Cs2 between the via conductors 51 and 52 and the first external electrode 41 and the fourth external electrode 44, the isolation characteristics between the output terminal OUT1 and the output terminal OUT2 of the coil component 1A deteriorate.

[0018] Therefore, in the coil component 1 according to this embodiment, via conductors 51 and 52 are provided at positions spaced apart from the first external electrode 41 and the fourth external electrode 44, thereby suppressing parasitic capacitances Cs1 and Cs2 generated between the via conductors 51 and 52 and the first external electrode 41 and the fourth external electrode 44, and ensuring the required isolation characteristics. Specifically, in the coil component 1, when viewed from the stacking direction, the laminate 3 is divided into a first region A and a second region B along the longitudinal direction by a bisector D, and the coil Lp1 is located in the first region A as shown in Figure 2. Furthermore, when the conductor of the coil Lp1 is divided into the conductor on the side closer to the first external electrode 41 and the fourth external electrode 44 and the conductor on the side farther away from the first external electrode 41 and the fourth external electrode 44, at least one of the via conductors 51 and 52 is provided in the conductor of the coil Lp1 on the side farther away. The position at which the via conductors 51 and 52 are spaced apart from the first external electrode 41 and the fourth external electrode 44 is such that, when viewed from the stacking direction, the straight lines I1 and I2 connecting the via conductors 51 and 52 with the first external electrode 41 and the fourth external electrode 44 at the minimum distance cross the opening region O of the coil Lp1.

[0019] Furthermore, the conductor of coil Lp1 on the side closer to the first external electrode 41 and the fourth external electrode 44 and the conductor of coil Lp1 on the side further away from them may be defined as follows. As shown in Figure 2, when viewed from the stacking direction, coil Lp1 is divided into two equal parts in the longitudinal direction (Y direction) of the laminate 3, with the side closer to the first external electrode 41 and the fourth external electrode 44 designated as the first conductor 10A, and the side further away from the first external electrode 41 and the fourth external electrode 44 designated as the second conductor 10B.

[0020] The coil Lp1 is provided with two via conductors, 51 and 52, but it is not limited to the case that both via conductors are provided on the second conductor 10B. It is sufficient that at least one of the via conductors 51 and 52 is provided on the second conductor. This makes it possible to suppress at least one of the parasitic capacitances Cs1 and Cs2.

[0021] Furthermore, because a flow of magnetic flux occurs inside the coil, the Q value of the coil deteriorates when via conductors are placed inside. However, among the coil component 1, which does not constitute a transformer, and the coils L1 to L3 that do constitute a transformer, even if the Q value of the non-transformer coil Lp1 deteriorates, it does not affect the transmission characteristics of the LC resonator. Therefore, by placing via conductors 51 and 52 of coil Lp1, which does not require consideration of the Q value, inside the coil, a larger area of ​​the coil can be secured within the laminate 3. This is particularly effective in coil component 1 where coil Lp1 and coils L1 to L3 are arranged within the laminate 3 so that they do not overlap.

[0022] Next, the configuration of each layer will be explained using exploded plan views. Figure 6 is a first exploded plan view showing the configuration of the coil component according to the embodiment. Figure 7 is a second exploded plan view showing the configuration of the coil component according to the embodiment. Figure 8 is a third exploded plan view showing the configuration of the coil component according to the embodiment. The coil component 1 is formed by stacking the ceramic green sheets shown in the first exploded plan view, the second exploded plan view, and the third exploded plan view in order from bottom to top.

[0023] First, the conductor patterns of the coils and capacitors, and the electrode patterns of the external electrodes, are formed on the ceramic green sheets 3a to 3l, which serve as substrates, by screen printing using a conductive paste (Ni paste), as shown in Figures 6 to 8.

[0024] As shown in Figure 6(a), electrode patterns 41a to 44a of the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3a.

[0025] As shown in Figure 6(b), electrode patterns 41b to 44b for the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3b. Furthermore, a conductor pattern 10b constituting one of the electrodes of the capacitor Cp1 is formed on the right side of the ceramic green sheet 3b in the figure. The conductor pattern 10b has wiring for electrical connection with the electrode pattern 42b.

[0026] As shown in Figure 6(c), electrode patterns 41c to 44c for the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3c. Furthermore, a conductor pattern 10c, which constitutes the other electrode of the capacitor Cp1, is formed on the right side of the ceramic green sheet 3c in the figure. The conductor pattern 10c is electrically connected to the electrode pattern 41c.

[0027] As shown in Figure 6(d), electrode patterns 41d to 44d of the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3d. Furthermore, a conductor pattern 10d that constitutes part of the coil Lp1 is formed on the right side of the ceramic green sheet 3d in the figure. One end of the conductor pattern 10d is electrically connected to the electrode pattern 41d, and the other end is electrically connected to a connection part 52d that connects to the via conductor 52.

[0028] As shown in Figure 7(e), electrode patterns 41e to 44e for the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3e. Furthermore, a conductor pattern 10e, which constitutes part of the coil Lp1, is formed on the right side of the ceramic green sheet 3e in the figure. One end of the conductor pattern 10e is electrically connected to a connection part 51e that connects to via conductor 51, and the other end is electrically connected to a connection part 52e that connects to via conductor 52.

[0029] As shown in Figure 7(f), electrode patterns 41f to 44f of the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3f. Furthermore, a conductor pattern 10f that constitutes part of the coil Lp1 is formed on the right side of the ceramic green sheet 3f in the figure. One end of the conductor pattern 10f is electrically connected to a connection part 51f that connects to via conductor 51, and the other end is electrically connected to a connection part 52f that connects to via conductor 52.

[0030] As shown in Figure 7(g), electrode patterns 41g to 44g for the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3g. Furthermore, a conductor pattern 10g constituting part of the coil Lp1 is formed on the right side of the figure on the ceramic green sheet 3g. One end of the conductor pattern 10g is electrically connected to a connection part 51g that connects to via conductor 51, and the other end is electrically connected to a connection part 52g that connects to via conductor 52. In addition, a conductor pattern 20g constituting part of the coil L2 of the transformer section is formed on the ceramic green sheet 3g in the center of the figure on the ceramic green sheet 3g. One end of the conductor pattern 20g is electrically connected to electrode pattern 42g, The other end It is electrically connected to the connection part 53g that connects to the via conductor. Furthermore, when viewed from the stacking direction, the region S1 where coil Lp1 is provided is narrower than the region S2 where coil L2 of the transformer section is provided.

[0031] As shown in Figure 7(h), electrode patterns 41h to 44h for the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3h. Furthermore, a conductor pattern 10h constituting part of the coil Lp1 is formed on the right side of the figure on the ceramic green sheet 3h. One end of the conductor pattern 10h is electrically connected to a connection part 51h that connects to via conductor 51, and the other end is electrically connected to a connection part 52h that connects to via conductor 52. In addition, a conductor pattern 20h constituting part of the coil L2 of the transformer section is formed on the ceramic green sheet 3h in the center of the figure on the ceramic green sheet 3h. One end of the conductor pattern 20h is electrically connected to electrode pattern 43h, The other end It is electrically connected to the connection point 53h which connects to the via conductor. The conductor pattern 20g and the conductor pattern 20h are electrically connected by a via conductor provided between the connection point 53g and the connection point 53h, forming coil L2.

[0032] As shown in Figure 8(i), electrode patterns 41i to 44i for the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3i. Furthermore, a conductor pattern 10i constituting part of the coil Lp1 is formed on the right side of the ceramic green sheet 3i in the figure. One end of the conductor pattern 10i is electrically connected to a connection part 51i that connects to via conductor 51, and the other end is electrically connected to a connection part 52i that connects to via conductor 52. In addition, a conductor pattern 20i constituting part of the coil L1 of the transformer section is formed on the ceramic green sheet 3i in the center of the figure. One end of the conductor pattern 20i is electrically connected to electrode pattern 42i, The other end It is electrically connected to the connector 54i that connects to the via conductor.

[0033] As shown in Figure 8(j), electrode patterns 41j to 44j of the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3j. Furthermore, a conductor pattern 10j constituting one electrode of capacitor CL2 is formed on the right side of the ceramic green sheet 3j in the figure. Also, a conductor pattern 30j constituting one electrode of capacitor CL1 is formed on the left side of the ceramic green sheet 3j in the figure. Furthermore, a conductor pattern 20j constituting part of the coil L1 of the transformer section is formed on the ceramic green sheet 3j in the center of the figure. One end of the conductor pattern 20j is electrically connected to the conductor patterns 10j and 30j. The other end It is electrically connected to the connection part 54j which connects to the via conductor. The conductor pattern 20i and the conductor pattern 20j are electrically connected by a via conductor provided between the connection part 54i and the connection part 54j, forming coil L1.

[0034] As shown in Figure 8(k), electrode patterns 41k to 44k for the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3k. Furthermore, a conductor pattern 10k constituting the other electrode of capacitor CL2 is formed on the right side of the ceramic green sheet 3k in the figure. Conductor pattern 10k is electrically connected to electrode pattern 44k. Also, a conductor pattern 30k constituting the other electrode of capacitor CL1 is formed on the left side of the ceramic green sheet 3k in the figure. Conductor pattern 30k is electrically connected to electrode pattern 43k. Furthermore, a conductor pattern 20k constituting part of the coil L3 of the transformer section is formed on the ceramic green sheet 3k in the center of the figure. One end of conductor pattern 20k is electrically connected to electrode pattern 42k. The other end It is electrically connected to the 55k resistor that connects to the via conductor.

[0035] As shown in Figure 8(l), electrode patterns 41l to 44l of the first external electrode 41 to the fourth external electrode 44 are formed on the ceramic green sheet 3l. Furthermore, a conductor pattern 20l, which constitutes part of the coil L3 of the transformer section, is formed on the ceramic green sheet 3l in the center of the figure. One end of the conductor pattern 20l is electrically connected to the electrode pattern 44l. The other end It is electrically connected to the connection part 55l that connects to the via conductor. The conductor pattern 20k and the conductor pattern 20l are electrically connected by a via conductor provided between the connection part 55k and the connection part 55l, forming coil L3. Furthermore, coils L1 to L3 constitute a transformer in which multiple coils are stacked in the stacking direction.

[0036] The first external electrode 41 is constructed by electrically connecting electrode patterns 41a to 41l formed on each of the ceramic green sheets 3a to 3l. Similarly, the second external electrode 42 is constructed by electrically connecting electrode patterns 42a to 42l formed on each of the ceramic green sheets 3a to 3l. The third external electrode 43 is constructed by electrically connecting electrode patterns 43a to 43l formed on each of the ceramic green sheets 3a to 3l. The fourth external electrode 44 is constructed by electrically connecting electrode patterns 44a to 44l formed on each of the ceramic green sheets 3a to 3l.

[0037] In coil component 1, at least one of each of the multiple ceramic green sheets 3a to 3l shown in Figure 3 is laminated, and multiple ceramic green sheets (dummy layers) without a conductor pattern printed on both the upper and lower sides are laminated. By pressing together the multiple ceramic green sheets, including the dummy layers, an unfired laminate 3 (ceramic body) is formed. The formed laminate 3 is fired, and copper electrodes are fired onto the outside of the fired laminate 3 so as to be electrically connected to each of the first external electrodes 41 to the fourth external electrodes 44.

[0038] As described above, the coil component 1 according to the embodiment includes a plurality of coils in a rectangular parallelepiped laminate 3. The coil component 1 comprises first external electrodes 41 to fourth external electrodes 44, at least a portion of which are formed on the side surface of the laminate 3; a coil Lp1 whose winding axis is in the lamination direction of the laminate 3; and coils L1 to L3, which are formed in positions that do not overlap with coil Lp1 when viewed from the lamination direction, and whose winding axes are in the lamination direction. Coil Lp1 includes a plurality of conductor patterns 10d to 10i that are laminated with an insulating layer in between, and via conductors 51 and 52 for electrically connecting the plurality of conductor patterns 10d to 10i. When the laminate 3 is divided into a first region A and a second region B in the longitudinal direction by a bisector D when viewed from the lamination direction, coil Lp1 is located in the first region A. Viewed from the stacking direction, the straight lines I1 and I2 connecting the via conductors 51 and 52 with the first external electrode 41 and the fourth external electrode 44 at the minimum distance traverse the opening region O of the coil Lp1.

[0039] As a result, in the coil component 1 according to the embodiment, when viewed from the stacking direction, the straight lines I1 and I2 connecting the via conductors 51 and 52 with the first external electrode 41 and the fourth external electrode 44 at the minimum distance traverse the opening region O of the coil Lp1. This allows the via conductors 51 and 52 to be separated from the first external electrode 41 and the fourth external electrode 44, suppressing parasitic capacitance between the coil Lp1 and the first external electrode 41 and the fourth external electrode 44, and enabling the coil component 1 to obtain the required characteristics (for example, isolation characteristics between output terminal OUT1 and output terminal OUT2).

[0040] Preferably, the side closer to the first external electrode 41 and the fourth external electrode 44 is designated as the first conductor 10A, and the side further away from the first external electrode 41 and the fourth external electrode 44 is designated as the second conductor 10B, with at least one of the via conductors 51 and 52 being provided on the second conductor 10B. This suppresses parasitic capacitance between the coil Lp1 and the first external electrode 41 and the fourth external electrode 44, thereby obtaining the characteristics required for the coil component 1.

[0041] Preferably, at least one of the via conductors 51 and 52 is provided on the side of the coil Lp1 parallel to the short side of the laminate 3 when viewed from the lamination direction. This makes it possible to suppress parasitic capacitance that occurs between the coil Lp1 and the first external electrode 41 and the fourth external electrode 44.

[0042] It is preferable that the via conductors 51 and 52 are provided inside coil Lp1. This allows for a larger area to be secured for coil Lp1 and coils L1 to L3 placed within the laminate 3.

[0043] When viewed from the stacking direction, it is preferable that the region S1 where coil Lp1 is provided is narrower than the region S2 where coils L1 to L3 are provided. This allows for a larger area to be secured for the transformer section placed within the stacked body 3.

[0044] It is preferable that coils L1 to L3 form a transformer by stacking multiple coils in the stacking direction. This makes it possible to configure a divider circuit in which coil Lp1, which does not constitute a transformer, and coils L1 to L3, which constitute a transformer, are arranged adjacent to each other.

[0045] Preferably, the multiple external electrodes are first external electrodes 41 to fourth external electrodes 44 formed at the four corners of the laminate 3. This allows the multiple external electrodes provided at the four corners of the laminate 3 to be electrically connected to the outside. <Variation> In the coil component 1 described above, the transformer section was explained as being constructed by stacking three coils, L1 to L3, in a stacking direction. However, it may also be constructed by stacking two or more coils in a stacking direction.

[0046] In the coil component 1 described so far, it was explained that it is composed of a laminated body 3 (ceramic element) of multiple stacked ceramic layers, but any multilayer structure of dielectric material will suffice.

[0047] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope of the claims are intended to be included. [Explanation of symbols]

[0048] 1,1A coil component, 3 laminate, 3a~3l ceramic green sheet, 10,20,30 conductor pattern, 10A first conductor, 10B second conductor, 41 first external electrode, 42 second external electrode, 43 third external electrode, 44 fourth external electrode, 51,52 via conductor.

Claims

1. A coil component comprising a rectangular parallelepiped laminate containing multiple coils, First to fourth external electrodes are formed at the four corners of the laminate, with at least a portion of the electrode formed on the side surface of the laminate. A first coil conductor whose winding axis is in the stacking direction of the laminate, The system comprises a second coil conductor formed in a position that does not overlap with the first coil conductor when viewed from the stacking direction, and whose winding axis is in the stacking direction, The first coil conductor is, Multiple conductor patterns are stacked with an insulating layer in between, A connecting conductor for electrically connecting the plurality of conductor patterns, The plurality of conductor patterns include a connecting portion formed at the end and electrically connected to the connecting conductor, When viewed from the stacking direction, and the longitudinal direction of the stacked material is divided into a first region and a second region by a line bisecting the material, the first coil conductor is located in the first region. The side closer to the first external electrode and the fourth external electrode located in the first region is designated as the first conductor, and the side further away from the first external electrode and the fourth external electrode is designated as the second conductor. At least one of the aforementioned connection parts is provided on the second conductor, A coil component in which, when viewed from the stacking direction, the straight line connecting the connection portion provided on the second conductor and the first external electrode and the fourth external electrode with the minimum distance traverses the opening region of the first coil conductor.

2. The coil component according to claim 1, wherein at least one of the connecting portions is provided on a side of the first coil conductor that is parallel to the short direction of the laminate when viewed from the lamination direction.

3. The coil component according to claim 1 or claim 2, wherein the connecting portion is provided inside the first coil conductor.

4. The coil component according to claim 1 or claim 2, wherein, when viewed from the stacking direction, the region where the first coil conductor is provided is narrower than the region where the second coil conductor is provided.

5. The coil component according to claim 1 or claim 2, wherein the second coil conductor constitutes a transformer in which a plurality of coils are stacked in the stacking direction.

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