Anti-cracking lead frame

Abstract

The utility model relates to the technical field of lead frames, in particular to an anti-cracking lead frame. Comprising a plurality of groups of lead frame upper parts, first connecting pins are arranged in the lead frame upper parts, second connecting pins are arranged in the lead frame upper parts, third connecting pins are arranged in the lead frame upper parts, and sensing connecting pins are arranged below the lead frame upper parts. A lead frame lower part is arranged below the lead frame upper part, two groups of first protective aluminum plates are symmetrically attached to the inner wall of the first connecting pin, a first metal plate is arranged in the first connecting pin, and two groups of second protective aluminum plates are arranged in the second connecting pin and the third connecting pin respectively. The second connecting pin and the third connecting pin are each internally provided with a group of second metal plates. According to the embodiment, the firmness of the pins is improved, and meanwhile the effect of preventing the pins from cracking is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead frames, and particularly relates to a lead frame for preventing cracking. Background Art

[0002] As a chip carrier for integrated circuits, a lead frame is a key structural component that realizes the electrical connection between the internal circuit lead-out ends of a chip and the external leads by means of bonding materials (gold wires, aluminum wires, copper wires), forming an electrical loop. It plays a role as a bridge connecting to external wires. Most semiconductor integrated circuits require the use of lead frames, which are important basic materials in the electronic information industry.

[0003] After retrieval, in the prior art, Chinese Patent Application No.: CN202322428846.2, Application Date: 2023-09-07, discloses a lead frame structure, which includes a frame and multiple groups of lead units arranged longitudinally and parallelly at intervals within the frame; the lead units are connected in series by two parallel longitudinal connecting bars, and the upper and lower ends of the longitudinal connecting bars are respectively connected to the upper and lower sides of the frame; each lead unit includes a first module, multiple pins, and a second module; the multiple pins are horizontally connected between the two longitudinal connecting bars, and both the first module and the second module include a base island and three pins; the three pins are respectively a first pin, a second pin, and a third pin; the base island is in a T shape rotated 90 degrees, and the first pin and the third pin are located on the upper and lower sides of the second pin.

[0004] However, this device still has the following defects: Although the above embodiment provides support through a T-shaped base island, reducing the connection distance and ensuring stable transmission and transmission efficiency. However, the anti-cracking effect of this structure has limitations, and the pin pitch is small, which is not convenient for processing and use. Summary of the Invention

[0005] In view of the above problems, the utility model provides a lead frame for preventing cracking, which includes several groups of upper parts of the lead frame. The interior of the upper part of the lead frame is provided with a first connection pin, the interior of the upper part of the lead frame is provided with a second connection pin, the interior of the upper part of the lead frame is provided with a third connection pin, two groups of connection sensing modules are arranged below the upper part of the lead frame, and sensing connection pins are arranged below the upper part of the lead frame;

[0006] Below the upper part of the lead frame is provided with a lower part of the lead frame. Auxiliary limiting grooves are opened at the joints of the two groups of upper parts of the lead frame. The inside of the first connection pin is arranged in a cavity structure. Two groups of first protective aluminum plates are symmetrically attached to the inner wall of the first connection pin. A first metal plate is arranged inside the first connection pin. A group of second protective aluminum plates are arranged inside each of the second connection pin and the third connection pin. A group of second metal plates are arranged inside each of the second connection pin and the third connection pin.

[0007] Further, several groups of the upper parts of the lead frame are all arranged in a rectangular frame structure, and several groups of the upper parts of the lead frame are connected in sequence. A group of frame connection through holes are opened at the top of each group of the upper parts of the lead frame. The central axis of each group of frame connection through holes coincides with the central axis of each group of the upper parts of the lead frame.

[0008] Further, the first connection pin is located on the central axis of the upper part of the lead frame. The second connection pin is located on one side of the upper part of the lead frame. The third connection pin is located on the other side of the upper part of the lead frame. And the second connection pin and the third connection pin are symmetrically arranged with the central axis of the first connection pin as the center.

[0009] Further, two groups of first connection blocks are symmetrically arranged at the bottom of the upper part of the lead frame. The two groups of first connection blocks are respectively located at the bottom edges of the upper part of the lead frame. The two groups of connection sensing modules are respectively fixedly connected to one ends of the two groups of first connection blocks.

[0010] Further, a second connection block is arranged at the bottom of the upper part of the lead frame. The central axis of the second connection block coincides with the central axis of the upper part of the lead frame.

[0011] Further, one end of the sensing connection pin is fixedly connected to one end of the second connection block. The other end of the sensing connection pin is fixedly connected to the lower part of the lead frame.

[0012] Further, an installation limiting empty groove is opened on the surface of the lower part of the lead frame. The central axis of the installation limiting empty groove coincides with the central axis of the upper part of the lead frame. And the installation limiting empty groove is located at the bottom end of the lower part of the lead frame.

[0013] Further, the first metal plate is located between the two groups of first protective aluminum plates. And a vacuum protection cavity is opened inside the first metal plate.

[0014] The beneficial effects of the utility model are:

[0015] 1. Two groups of first protective aluminum plates are symmetrically attached to the inner wall of the first connection pin. A first metal plate is provided inside the first connection pin. A group of second protective aluminum plates are provided inside each of the second connection pin and the third connection pin. A group of second metal plates are also provided inside each of the second connection pin and the third connection pin, which improves the firmness of the pins and at the same time achieves the effect of preventing the pins from cracking.

[0016] 2. A first connection pin is provided inside the upper part of the lead frame. A second connection pin is provided inside the upper part of the lead frame. A third connection pin is provided inside the upper part of the lead frame. The second connection pin and the third connection pin are symmetrically arranged with the central axis of the first connection pin as the center, which increases the gap between the connecting leads, thereby achieving the effect of reducing the difficulty of chip circuit connection and improving the practicality at the same time.

[0017] Other features and advantages of the present utility model will be described in the subsequent description. And, partly, they will become obvious from the description or be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Shows a schematic structural diagram according to an embodiment of the present utility model;

[0020] Figure 2 Shows a schematic diagram of the upper structure of the lead frame according to an embodiment of the present utility model;

[0021] Figure 3 Shows a schematic cross-sectional view of the first connection pin according to an embodiment of the present utility model;

[0022] Figure 4 Shows a schematic cross-sectional view of the second connection pin according to an embodiment of the present utility model.

[0023] In the figure: 1. Upper part of the lead frame; 2. Frame connecting through hole; 3. First connecting pin; 4. Second connecting pin; 5. Third connecting pin; 6. First connecting block; 7. Connecting sensor module; 8. Second connecting block; 9. Sensor connecting pin; 10. Lower part of the lead frame; 11. Installation limit slot; 12. Auxiliary limit groove; 13. First protective aluminum plate; 14. First metal plate; 15. Vacuum protective chamber; 16. Second protective aluminum plate; 17. Second metal plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The present invention provides a crack-proof lead frame, comprising a plurality of lead frame upper parts 1; illustratively, Figures 1-4 shown.

[0026] Several groups of lead frame upper parts 1 are arranged in a rectangular frame structure, and several groups of lead frame upper parts 1 are connected in sequence, and a group of frame connection through holes 2 are opened at the top of each group of lead frame upper parts 1, and the central axis of each group of frame connection through holes 2 coincides with the central axis of each group of lead frame upper parts 1, and a first connection pin 3 is arranged inside the lead frame upper part 1, and the first connection pin 3 is located on the central axis of the lead frame upper part 1;

[0027] A second connecting pin 4 is provided inside the upper part 1 of the lead frame, and the second connecting pin 4 is located on one side of the upper part 1 of the lead frame. A third connecting pin 5 is provided inside the upper part 1 of the lead frame, and the third connecting pin 5 is located on the other side of the upper part 1 of the lead frame. The second connecting pin 4 and the third connecting pin 5 are symmetrically arranged with the central axis of the first connecting pin 3 as the center. Two groups of first connecting blocks 6 are symmetrically arranged at the bottom of the upper part 1 of the lead frame.

[0028] The two groups of the first connecting blocks 6 are respectively located at the bottom edge of the lead frame upper part 1, and two groups of connection sensor modules 7 are provided below the lead frame upper part 1. The two groups of connection sensor modules 7 are respectively fixedly connected to one end of the two groups of first connecting blocks 6. A second connecting block 8 is provided at the bottom of the lead frame upper part 1, and the central axis of the second connecting block 8 coincides with the central axis of the lead frame upper part 1. A sensing connection pin 9 is provided below the lead frame upper part 1.

[0029] Specifically, a first connection pin 3 is provided inside the upper part 1 of the lead frame, a second connection pin 4 is provided inside the upper part 1 of the lead frame, a third connection pin 5 is provided inside the upper part 1 of the lead frame, and the second connection pin 4 and the third connection pin 5 are symmetrically arranged with the central axis of the first connection pin 3 as the center, so as to increase the gap between the connecting leads, thereby reducing the difficulty of chip circuit connection.

[0030] A lower part 10 of the lead frame is provided below the upper part 1 of the lead frame. One end of the sensing connection pin 9 is fixedly connected to one end of the second connection block 8, the other end of the sensing connection pin 9 is fixedly connected to the lower part 10 of the lead frame, and an installation limiting empty groove 11 is formed on the surface of the lower part 10 of the lead frame. The central axis of the installation limiting empty groove 11 coincides with the central axis of the upper part 1 of the lead frame, and the installation limiting empty groove 11 is located at the bottom end of the lower part 10 of the lead frame.

[0031] Auxiliary limiting grooves 12 are formed at the joints of the two upper parts 1 of the lead frame. The inside of the first connection pin 3 is provided with a cavity structure. Two groups of first protective aluminum plates 13 are symmetrically attached to the inner wall of the first connection pin 3. A first metal plate 14 is provided inside the first connection pin 3. The first metal plate 14 is located between the two groups of first protective aluminum plates 13, and a vacuum protection cavity 15 is formed inside the first metal plate 14.

[0032] One group of second protective aluminum plates 16 is provided inside each of the second connection pin 4 and the third connection pin 5, and one group of second metal plates 17 is provided inside each of the second connection pin 4 and the third connection pin 5. Each group of second metal plates 17 is not in contact with each group of second protective aluminum plates 16.

[0033] Specifically, two groups of first protective aluminum plates 13 are symmetrically attached to the inner wall of the first connection pin 3, a first metal plate 14 is provided inside the first connection pin 3, one group of second protective aluminum plates 16 is provided inside each of the second connection pin 4 and the third connection pin 5, and one group of second metal plates 17 is provided inside each of the second connection pin 4 and the third connection pin 5, so as to improve the firmness of the pins and prevent the pins from cracking and affecting the use effect of the lead frame.

[0034] The working principle of a lead frame for preventing cracking proposed by the embodiment of the present utility model is as follows:

[0035] Inside the upper part 1 of the lead frame, a first connection pin 3 is provided. Inside the upper part 1 of the lead frame, a second connection pin 4 is provided. Inside the upper part 1 of the lead frame, a third connection pin 5 is provided. Then, the second connection pin 4 and the third connection pin 5 are symmetrically arranged with the central axis of the first connection pin 3 as the center, increasing the gap between the connecting leads, thereby reducing the difficulty of chip circuit connection.

[0036] On the inner wall of the first connection pin 3, two groups of first protective aluminum plates 13 are symmetrically attached. Inside the first connection pin 3, a first metal plate 14 is provided. Inside each of the second connection pin 4 and the third connection pin 5, a group of second protective aluminum plates 16 is provided. Then, inside each of the second connection pin 4 and the third connection pin 5, a group of second metal plates 17 is provided, improving the firmness of the pins and preventing the pins from cracking and affecting the use effect of the lead frame.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-cracking lead frame, comprising a plurality of groups of upper parts of the lead frame (1), characterized in that: Inside the upper part (1) of the lead frame, there is a first connection pin (3), inside the upper part (1) of the lead frame, there is a second connection pin (4), inside the upper part (1) of the lead frame, there is a third connection pin (5), below the upper part (1) of the lead frame, there are two groups of connection sensing modules (7), and below the upper part (1) of the lead frame, there is a sensing connection pin (9); Below the upper part (1) of the lead frame, there is a lower part (10) of the lead frame. Auxiliary limit grooves (12) are opened at the joints of the two groups of upper parts (1) of the lead frame. The inside of the first connection pin (3) is of a cavity structure. Two groups of first protective aluminum plates (13) are symmetrically attached to the inner wall of the first connection pin (3). Inside the first connection pin (3), there is a first metal plate (14). Inside each of the second connection pin (4) and the third connection pin (5), there is a group of second protective aluminum plates (16), and inside each of the second connection pin (4) and the third connection pin (5), there is a group of second metal plates (17).

2. The anti-cracking lead frame according to claim 1, wherein: Several groups of the upper parts (1) of the lead frame are all arranged in a rectangular frame structure, and several groups of the upper parts (1) of the lead frame are connected in sequence. At the top of each group of the upper parts (1) of the lead frame, there is a group of frame connection through holes (2), and the central axis of each group of frame connection through holes (2) coincides with the central axis of each group of the upper parts (1) of the lead frame.

3. The anti-cracking lead frame according to claim 2, characterized in that: The first connection pin (3) is located on the central axis of the upper part (1) of the lead frame, the second connection pin (4) is located on one side of the upper part (1) of the lead frame, the third connection pin (5) is located on the other side of the upper part (1) of the lead frame, and the second connection pin (4) and the third connection pin (5) are symmetrically arranged with the central axis of the first connection pin (3) as the center.

4. The anti-cracking lead frame according to claim 3, characterized in that: At the bottom of the upper part (1) of the lead frame, there are two groups of first connection blocks (6) symmetrically. The two groups of first connection blocks (6) are respectively located at the bottom edges of the upper part (1) of the lead frame. The two groups of connection sensing modules (7) are respectively fixedly connected to one ends of the two groups of first connection blocks (6).

5. The anti-cracking lead frame according to claim 1, wherein: At the bottom of the upper part (1) of the lead frame, there is a second connection block (8), and the central axis of the second connection block (8) coincides with the central axis of the upper part (1) of the lead frame.

6. The anti-cracking lead frame according to claim 5, wherein: One end of the sensing connection pin (9) is fixedly connected to one end of the second connection block (8), and the other end of the sensing connection pin (9) is fixedly connected to the lower part (10) of the lead frame.

7. The anti-cracking lead frame according to claim 1, wherein: On the surface of the lower part (10) of the lead frame, there is an installation limit empty groove (11). The central axis of the installation limit empty groove (11) coincides with the central axis of the upper part (1) of the lead frame, and the installation limit empty groove (11) is located at the bottom end of the lower part (10) of the lead frame.

8. The anti-cracking lead frame according to claim 2, wherein: The first metal plate (14) is located between the two groups of first protective aluminum plates (13), and inside the first metal plate (14), there is a vacuum protection cavity (15).

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