Lead frame assembly and lead frame assembly array

Abstract

The utility model discloses a lead frame assembly and a lead frame assembly array, and belongs to the technical field of lead frames, and the frame assembly comprises a frame body and a hollow structure wrapping the frame body. The frame body is provided with a first bent protruding part and a second bent protruding part, the first bent protruding part and the second bent protruding part are arranged in the length direction of the frame body in a spaced mode, and the first bent protruding part and the second bent protruding part are located on the same side of the frame body. And exhaust holes are formed in the first bent convex part and the second bent convex part. According to the lead frame assembly disclosed by the utility model, the frame body is provided with the first bending bulge part and the second bending bulge part which are provided with the exhaust holes, so that the lead frame assembly has the advantages of assisting in stress release, assisting in rapid exhaust, facilitating observation of solder paste sticking and moistening conditions, being good in heat dissipation effect and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of lead frames, in particular to a lead frame component and a lead frame component array. Background Art

[0002] In the field of chip packaging, clip-on connectors (CLIP FRAME, also called jumper connection structures) can be used to replace wires, connect chip electrodes, and achieve electrical connections between the inside and outside of the chip. Usually, the chip is arranged on the lead frame body, and then the clip-on connector is set on the top of the chip. Finally, the common chip on the market can be obtained through steps such as plastic sealing and cutting.

[0003] Compared with the traditional wire bonding method, chips packaged with clip-type connectors have the advantages of good heat dissipation, low on-resistance and high packaging stability.

[0004] However, in the prior art, there are still some problems with chips packaged with clip-type connectors. For example, there are problems with exhaust, which leads to voids, affects RDSON, and results in poor packaging stability and reliability. For another example, the clip-type connectors are wide, blocking the line of sight, and production personnel cannot clearly understand the viscosity of the solder paste under the connectors, affecting the packaging quality. For another example, existing clip-type connectors are not conducive to stress release.

[0005] The above problems have become issues that need to be solved urgently. Utility Model Content

[0006] The utility model discloses a lead frame component and a lead frame component array to improve the above problems.

[0007] The technical solution adopted by the utility model to solve the above technical problems is:

[0008] Based on the above objectives, the utility model discloses a lead frame assembly, comprising:

[0009] A frame body, wherein a first bent protrusion and a second bent protrusion are arranged on the frame body, the first bent protrusion and the second bent protrusion are arranged at intervals along the length direction of the frame body, and the first bent protrusion and the second bent protrusion are located on the same side of the frame body, and exhaust holes are arranged on the first bent protrusion and the second bent protrusion.

[0010] Optionally: the width of the first bent protrusion is smaller than the width of the second bent protrusion.

[0011] Optionally: at least one exhaust hole is provided on the first bent protrusion, and at least two exhaust holes are provided on the second bent protrusion.

[0012] Optionally, the number of exhaust holes on the second bent protrusion is greater than the number of exhaust holes on the first bent protrusion.

[0013] Optionally: a protrusion height of the first bent protrusion is greater than a protrusion height of the second bent protrusion.

[0014] Optionally: a first exhaust groove is arranged on the back side of the first bent protrusion, and the longitudinal section of the first exhaust groove is a right-angled trapezoid; a second exhaust groove is arranged on the back side of the second bent protrusion, and the longitudinal section of the second exhaust groove is an isosceles trapezoid.

[0015] Optionally, an angle between a side wall of the first exhaust groove close to the second exhaust groove and a bottom wall of the first exhaust groove is 120 degrees, and a side wall of the first exhaust groove away from the second exhaust groove is perpendicular to the bottom wall of the first exhaust groove.

[0016] Optionally, a bottom surface of a portion of the first bending protrusion close to the second bending protrusion is lower than a bottom surface of a portion of the first bending protrusion away from the second bending protrusion.

[0017] The utility model also discloses a lead frame component array, comprising a plurality of the lead frame components as described above and a plurality of bending components arranged in an array, each of the bending components being arranged between adjacent lead frame components along the length direction of the lead frame component array.

[0018] Optionally: each of the bending components includes at least one bending bar, a first end of the bending bar is connected to the lead frame component array body, and a second end of the bending bar is a free end.

[0019] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0020] The embodiment of the utility model discloses a lead frame assembly, which includes a frame body and a hollow structure. The frame body is provided with a first bent protrusion and a second bent protrusion, the first bent protrusion and the second bent protrusion are arranged at intervals along the length direction of the frame body, and the first bent protrusion and the second bent protrusion are located on the same side of the frame body, and exhaust holes are provided on the first bent protrusion and the second bent protrusion. The hollow structure is wrapped outside the frame body.

[0021] The lead frame assembly disclosed in the utility model is provided with a first bent protrusion and a second bent protrusion with exhaust holes on the frame body, which has the following advantages:

[0022] It can promote exhaust and avoid cavitation, which will affect RDSON;

[0023] Convenient to observe the stickiness of solder paste and ensure the packaging quality;

[0024] It is beneficial to the stress release of the connecting parts;

[0025] Good heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a lead frame assembly disclosed in an embodiment of the utility model is shown;

[0027] Figure 2 A schematic diagram of a hollow structure disclosed in an embodiment of the utility model is shown;

[0028] Figure 3 A schematic diagram of a frame body disclosed in an embodiment of the utility model is shown;

[0029] Figure 4 A side cross-sectional schematic diagram of a frame body disclosed in an embodiment of the utility model is shown;

[0030] Figure 5 A schematic diagram of a lead frame assembly array disclosed in an embodiment of the utility model is shown;

[0031] Figure 6 A schematic diagram of the expansion of the lead frame assembly array disclosed in the embodiment of the utility model is shown;

[0032] Figure 7 A schematic top view of a lead frame assembly array disclosed in an embodiment of the utility model is shown;

[0033] Figure 8 A schematic top view of a bending assembly disclosed in an embodiment of the utility model is shown;

[0034] Fig. 9 A schematic front cross-sectional view of a bending assembly disclosed in an embodiment of the utility model is shown.

[0035] In the figure:

[0036] 100-lead frame assembly, 110-hollow structure, 111-first hollow portion, 112-second hollow portion, 113-auxiliary hollow portion, 120-frame body, 121-first bending protrusion, 122-second bending protrusion, 123-exhaust hole, 124-first exhaust groove, 125-second exhaust groove, 126-glue locking hole, 200-connecting strip, 210-bending assembly, 220-first positioning hole, 230-second positioning hole, 240-bending strip, 241-bending angle. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings. Example

[0038] See also Figures 1 to 4 The embodiment of the utility model discloses a lead frame assembly 100 (CLIP FRAME, also called jumper connection structure), which includes a frame body 120 and a hollow structure 110. The frame body 120 is provided with a first bent protrusion 121 and a second bent protrusion 122, the first bent protrusion 121 and the second bent protrusion 122 are arranged at intervals along the length direction of the frame body 120, and the first bent protrusion 121 and the second bent protrusion 122 are located on the same side of the frame body 120, and exhaust holes 123 are provided on the first bent protrusion 121 and the second bent protrusion 122. The hollow structure 110 is arranged outside the frame body 120.

[0039] The lead frame assembly 100 disclosed in the present embodiment is provided with a first bent protrusion 121 and a second bent protrusion 122 on the frame body 120, which can cross the gate bus during packaging on the one hand, and is conducive to exhaust on the other hand; and the exhaust holes are provided, which can promote exhaust and stress release at the same time, and the viscosity of the solder paste below can be observed through the exhaust holes to ensure production quality; in addition, compared with the traditional wire bonding method, the lead frame assembly 100 of the utility model is more conducive to heat dissipation.

[0040] See also Figure 2 The hollow structure 110 includes a first hollow portion 111, a second hollow portion 112 and an auxiliary hollow portion 113. The first hollow portion 111 is correspondingly arranged outside the first bent protrusion 121, and a locking glue hole 126 for connection is arranged at a position corresponding to the first hollow portion 111 on the frame body 120. The second hollow portion 112 is correspondingly arranged outside the second bent protrusion 122. The auxiliary hollow portion 113 is arranged between the first hollow portion 111 and the second hollow portion 112.

[0041] See also Figure 3 and Figure 4 The frame body 120 is in a plate shape, and the first bending protrusion 121 and the second bending protrusion 122 make the frame body 120 present an overall bent shape, thereby facilitating gas discharge and crossing the gate bus during packaging.

[0042] The frame body 120 has a first end and a second end opposite to each other, the first bent protrusion 121 is arranged at the first end of the frame body, and the second bent protrusion 122 is arranged at the second end of the frame body 120. The first bent protrusion 121 and the second bent protrusion 122 are arranged at intervals along the length direction of the frame body 120, and the first bent protrusion 121 and the second bent protrusion 122 are located on the same side of the frame body 120, that is, they protrude outward from the same side of the frame body 120. Among them, the width of the first end of the frame body 120 is small, the width of the first bent protrusion 121 is smaller than the width of the second bent protrusion 122, and the length of the first bent protrusion 121 is greater than the length of the second bent protrusion 122.

[0043] It should be noted that the length direction of this embodiment is as follows Figure 1 The up and down directions shown, Figure 7 Left and right directions shown.

[0044] See also Figure 1 A plurality of exhaust holes 123 are provided on the frame, and the exhaust holes 123 are distributed on the first bent protrusion 121 and the second bent protrusion 122. The exhaust holes are provided to facilitate exhaust, stress release and observation of solder paste viscosity.

[0045] Furthermore, the number of the exhaust holes on the second bent protrusion 122 may be greater than the number of the exhaust holes 123 on the first bent protrusion 121 .

[0046] See also Figure 4 , the protrusion height of the first bent protrusion 121 is greater than the protrusion height of the second bent protrusion 122. Here, the protrusion height refers to the distance between the highest point of a protrusion and the ground of the frame body.

[0047] A first exhaust groove 124 is provided on the back side of the first bent protrusion 121, and the longitudinal section of the first exhaust groove 124 is a right-angle trapezoid. In this embodiment, the angle between the side wall of the first exhaust groove 124 close to the second exhaust groove 125 and the bottom wall of the first exhaust groove 124 can be 120 degrees, and the side wall of the first exhaust groove 124 away from the second exhaust groove 125 is perpendicular to the bottom wall. Of course, in other embodiments, other angles can be formed between the side wall and the bottom wall.

[0048] A second exhaust groove 125 is provided on the back side of the second bent protrusion 122, and the longitudinal section of the second exhaust groove 125 is an isosceles trapezoid. The angles between the two side walls of the second exhaust groove 125 and the bottom wall of the second exhaust groove 125 are both 120 degrees. Of course, in other embodiments, it is also possible to form other angles between the side walls of the second exhaust groove 125 and the bottom wall of the second exhaust groove 125.

[0049] See also Figure 4 The bottom surface of the portion of the first bending protrusion 121 close to the second bending protrusion 122 (hereinafter referred to as the proximal end) is lower than the bottom surface of the portion away from the second bending protrusion 122 (hereinafter referred to as the distal end).

[0050] Assume that the side where the first bent protrusion 121 and the second bent protrusion 122 protrude from the frame assembly body is called the upper surface of the frame body, and the other side is the lower surface; then Figure 4 In the figure, the lower surface of the connecting portion between the first bent protrusion 121 and the second bent protrusion 122 is the lower surface of the frame component body. At this time, the proximal end of the first bent protrusion 121 is directly connected to the connecting portion. Therefore, the bottom surface of the proximal end is actually flush with the lower surface of the frame component body, and the bottom surface of the distal end is slightly higher than the lower surface of the frame component body.

[0051] See also Figures 5 to 9 The embodiment of the utility model further discloses a lead frame assembly array, which includes a plurality of lead frame assemblies 100 as described above and a plurality of bending assemblies 210. The plurality of lead frame assemblies 100 are arranged in an array, and the frame bodies 120 in each lead frame assembly 100 are connected to the connecting bar 200 through connecting ribs. A plurality of bending assemblies 210 are arranged on the connecting bar 200, and the plurality of bending assemblies 210 are arranged one-to-one with the plurality of lead frame assemblies 100, and each bending assembly 210 is arranged between adjacent frame bodies 120 along the length direction of the lead frame assembly array 100.

[0052] like Figure 5 The lead frame component array (clip) is a roll structure, and the bending component 210 plays a role of spacing between layers at the frame to prevent the clip from deforming. In addition, the bending component 210 also has the functions of positioning and facilitating the dragging of materials.

[0053] Each bending assembly 210 includes at least one bending bar 240. The first end of the bending bar 240 is connected to the connecting bar 200, and the second end of the bending bar 240 is a free end, that is, the second end of the bending bar 240 is no longer connected to the connecting bar 200, so that the bending bar 240 has a certain elasticity. The angle between the first end of the bending bar and the connecting bar 200 is 120 degrees, and the angle of the bending angle 241 of the bending bar itself is 68 degrees, and the bending angle of the bending bar is set toward the bending assembly 210.

[0054] A plurality of lead frame assemblies 100 are arranged in rows on the connection bar 200. One row, two rows, or more rows may be arranged according to the width of the connection bar 200. In this embodiment, two rows are taken as an example for description.

[0055] When the lead frame assemblies 100 on the connection bar 200 are arranged in two or more rows, each lead frame assembly 100 in the plurality of rows of lead frame assemblies 100 is aligned.

[0056] A plurality of first positioning holes 220 are provided on the connecting bar 200 , and the plurality of first positioning holes 220 are provided according to the number of lead frame assemblies 100 in a row. A first positioning hole 220 is provided at each position of the lead frame assembly 100 in a row, and the first positioning hole 220 is located at the edge of the connecting bar 200 .

[0057] A second positioning hole 230 is also provided on the connecting bar 200, and the second positioning hole 230 is located in the middle of the connecting bar. At least two lead frame assemblies 100 are provided between each two adjacent second positioning holes 230, and the number of lead frame assemblies 100 between each two adjacent second positioning holes 230 is equal.

[0058] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lead frame assembly, characterized in that: include: A frame body, wherein a first bent protrusion and a second bent protrusion are arranged on the frame body, the first bent protrusion and the second bent protrusion are arranged at intervals along the length direction of the frame body, and the first bent protrusion and the second bent protrusion are located on the same side of the frame body, and exhaust holes are arranged on the first bent protrusion and the second bent protrusion.

2. The lead frame assembly according to claim 1, wherein: The width of the first bent protrusion is smaller than the width of the second bent protrusion.

3. The lead frame assembly according to claim 1, wherein: At least one of the exhaust holes is disposed on the first bent protrusion, and at least two of the exhaust holes are disposed on the second bent protrusion.

4. The lead frame assembly according to claim 3, wherein: The number of the exhaust holes on the second bent protrusion is greater than the number of the exhaust holes on the first bent protrusion.

5. The lead frame assembly according to claim 1, wherein: The protrusion height of the first bent protrusion is greater than the protrusion height of the second bent protrusion.

6. The lead frame assembly according to claim 1, wherein: A first exhaust groove is disposed on the back side of the first bent protrusion, and the longitudinal section of the first exhaust groove is a right-angled trapezoid. A second exhaust groove is disposed on the back side of the second bent protrusion, and the longitudinal section of the second exhaust groove is an isosceles trapezoid.

7. The lead frame assembly according to claim 6, wherein: The angle between the side wall of the first exhaust groove close to the second exhaust groove and the bottom wall of the first exhaust groove is 120 degrees, and the side wall of the first exhaust groove away from the second exhaust groove is perpendicular to the bottom wall of the first exhaust groove.

8. The lead frame assembly according to any one of claims 1 to 7, characterized in that: A bottom surface of a portion of the first bending protrusion close to the second bending protrusion is lower than a bottom surface of a portion of the first bending protrusion away from the second bending protrusion.

9. A lead frame assembly array, characterized in that: The invention comprises a plurality of lead frame assemblies according to any one of claims 1 to 8 and a plurality of bending assemblies arranged in an array, each of the bending assemblies being arranged between adjacent lead frame assemblies along a length direction of the lead frame assembly array.

10. The lead frame assembly array according to claim 9, characterized in that: Each of the bending components includes at least one bending bar, a first end of the bending bar is connected to the lead frame component array body, and a second end of the bending bar is a free end.

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