B2 encapsulation assembly fool-proof jig

Abstract

The utility model relates to the technical field of semiconductor packaging, and specifically discloses a B2 sealing shell assembly foolproof jig, which comprises a bottom plate, a center plate and a cover plate, the center plate is arranged on the upper end face of the bottom plate, a plurality of jack sockets are arranged on the upper end face of the center plate, the cover plate covers the upper end face of the center plate, a plurality of square through holes corresponding to the positions of the jack sockets are arranged on the outer wall of the cover plate, after the cover plate and the center plate are closed, the square through holes and the center plate jointly enclose a square cavity, mechanical specification verification is realized through linkage of the reconfigurable top pin array and the positioning structure, and manual identification errors are completely eliminated; the free layout design of the top pin is suitable for dozens of shell variants, and the cost of changing the type is greatly reduced; the cavity positioning column and the product jack socket are precisely matched to eliminate deviation; multi-cavity parallel processing improves efficiency, and the avoidance groove is compatible with the shell protruding components.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor packaging technology, and specifically discloses a B2 casing assembly error-proof fixture. Background Technology

[0002] In the manufacturing process of power semiconductor modules (such as IGBTs), the precise assembly of the ceramic copper-clad substrate (DBC) and the plastic housing is a critical step. The housing surface typically has dozens to hundreds of pin holes, and the number of pins, their arrangement, and the housing dimensions vary significantly between different product specifications.

[0003] The current mainstream process relies entirely on manual operation by the operator: visually identify the shell specifications according to the drawings, manually insert the corresponding pins, and then align and press the DBC with the shell.

[0004] The purely manual operation mode has a high error rate in specification identification: manual comparison of drawings can easily lead to confusion between similar shells, resulting in incorrect pin insertion; it is impossible to verify whether the number and position of the inserted pins meet the current specifications; products with incorrectly installed pins flow into subsequent processes, causing batch scrap; manual placement of DBCs and shells may result in misalignment, affecting the reliability of electrical connections; manual pin insertion and verification take too long, restricting the production line cycle time. Utility Model Content

[0005] This utility model proposes a B2 casing assembly error-proof fixture, which achieves mechanical specification verification through the linkage of a reconfigurable top pin array and a positioning structure, completely eliminating human identification errors.

[0006] This utility model is implemented as follows: a B2 sealing shell assembly error-proof fixture includes a base plate, a center plate, and a cover plate. The center plate is disposed on the upper end surface of the base plate, and multiple sets of insertion holes are opened on the upper end surface of the center plate. The cover plate covers the upper end surface of the center plate, and multiple sets of square through holes corresponding to the positions of the insertion holes are opened on the outer wall of the cover plate. After the cover plate and the center plate are closed, the square through holes and the center plate together form a square cavity.

[0007] As a preferred embodiment of the B2 casing assembly error-proof fixture of this utility model, a top pin is detachably connected inside the insertion hole, and the top of the top pin protrudes from the upper end face of the center plate.

[0008] As a preferred embodiment of the B2 sealing assembly anti-foolproof fixture of this utility model, a positioning post is fixedly connected to the bottom of the inner side of the square cavity, and the positioning post is a cylinder.

[0009] As a preferred embodiment of the B2 casing assembly anti-foolproof fixture of this utility model, positioning rods are fixedly connected to both the left and right sides of the upper end face of the base plate, and positioning holes matching the positioning rods are opened on the outer walls of both the left and right sides of the center plate and the cover plate.

[0010] As a preferred embodiment of the B2 casing assembly anti-foolproof fixture of this utility model, each set of square through holes has a clearance groove extending from both sides.

[0011] As a preferred embodiment of the B2 casing assembly error-proof fixture of this utility model, the multiple sets of sockets are all rectangular array distribution structures.

[0012] The beneficial effects of this utility model are:

[0013] This device achieves mechanical specification verification through the linkage of a reconfigurable top pin array and a positioning structure, completely eliminating errors caused by manual identification; the free layout design of the top pins adapts to dozens of shell variations, significantly reducing the cost of changing models; the cavity positioning post and the product insertion hole are precisely matched to eliminate offset; multi-cavity parallel processing improves efficiency, while the clearance groove is compatible with protruding parts of the shell. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a structural diagram of the present invention;

[0016] Figure 2 This is a bottom structural diagram of the present invention;

[0017] Figure 3 This is a structural diagram of the central plate of this utility model.

[0018] The markings in the diagram are: 1. Base plate; 2. Center plate; 3. Insertion hole; 4. Cover plate; 5. Square through hole; 6. Clearance groove; 7. Square cavity; 8. Positioning post; 9. Positioning rod; 10. Positioning hole; 11. Top pin. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0020] Please see Figure 1-3A B2 enclosure assembly error-proof fixture includes a base plate 1, a center plate 2, and a cover plate 4. The center plate 2 is disposed on the upper end face of the base plate 1, and multiple sets of insertion holes 3 are opened on the upper end face of the center plate 2. The cover plate 4 covers the upper end face of the center plate 2, and multiple sets of square through holes 5 corresponding to the positions of the insertion holes 3 are opened on the outer wall of the cover plate 4. After the cover plate 4 and the center plate 2 are closed, the square through holes 5 and the center plate 2 together form a square cavity 7.

[0021] In this embodiment: the operator places the shell with pins inserted into the square through hole 5 of the cover plate 4. The positioning hole at the bottom of the shell is connected to the positioning post 8 on the center plate 2 to achieve coarse positioning. When pressed down, the top pin 11 protruding from the upper end face of the center plate 2 is precisely pushed into the designated hole of the shell, pushing out the correct pins. Pins not acted upon by the top pin 11 are retained in the hole. If the specification is incorrect, the retained pins interfere with the top pin 11 or the bottom of the cavity, causing the pressing to be obstructed. After manually removing the protruding excess pins, a compliant product is obtained. The detachable design of the top pin 11 in the insertion hole 3 can be adjusted to adapt to dozens of specifications. The clearance grooves 6 on both sides of the cover plate 4 accommodate the heat sink of the shell to avoid damage. The positioning rod 9 of the bottom plate 1 and the positioning hole 10 of the center plate 2 and the cover plate 4 ensure zero offset of the three-layer plate assembly. Through the linkage of the reconfigurable top pin 11 array and the positioning structure, mechanical specification verification is achieved, completely eliminating manual identification errors. The free layout design of the top pin 11 adapts to dozens of shell variations, greatly reducing the cost of changing models.

[0022] As a technical optimization of this utility model, a top pin 11 is detachably connected inside the socket 3, and the top of the top pin 11 protrudes from the upper end surface of the center plate 2.

[0023] In this embodiment, the detachable design of the top pin 11 within the socket 3 allows for adjustment of its position to accommodate dozens of specifications.

[0024] As a technical optimization of this utility model, a positioning post 8 is fixedly connected to the bottom of the inner cavity 7, and the positioning post 8 is a cylinder.

[0025] In this embodiment, the positioning hole at the bottom of the outer shell is inserted into the positioning post 8 on the center plate 2 to achieve coarse positioning.

[0026] As a technical optimization of this utility model, positioning rods 9 are fixedly connected to the left and right sides of the upper end face of the base plate 1, and positioning holes 10 matching the positioning rods 9 are opened on the outer walls of the left and right sides of the center plate 2 and the cover plate 4.

[0027] In this embodiment: the positioning rod 9 of the base plate 1 and the positioning hole 10 of the cover plate 4 of the center plate 2 ensure zero offset during the assembly of the three-layer plate.

[0028] As a technical optimization of this utility model, each set of square through holes 5 has a relief groove 6 extending on both sides.

[0029] In this embodiment: the clearance grooves 6 on both sides of the cover plate 4 accommodate the heat sink of the outer shell to avoid damage.

[0030] As a technical optimization of this utility model, the multiple sets of sockets 3 are all rectangular array distribution structures.

[0031] In this embodiment: the multiple sets of sockets 3 are all rectangular array distribution structures, which match the pin holes on the outer wall of the outer shell.

[0032] The working principle and usage process of this utility model are as follows: When in use, the shell to be tested is placed in the square through hole 5 of the cover plate 4, and the positioning hole at the bottom of the shell is fitted into the positioning post 8 of the center plate 2 to complete the pre-positioning; when the shell is pressed down, the top pin 11 pre-installed in the insertion hole 3 of the center plate 2 pushes upward into the corresponding hole of the shell, pushing the pins that need to be retained to protrude upward; the pins in the holes not covered by the top pin 11 remain in their original positions due to the lack of pushing force; if the shell specifications are incorrect, its excess pins will mechanically interfere with the surface of the center plate 2 in the area without the top pin 11, preventing the shell from being pressed to the bottom; after manually removing the excess pins that have not been pushed out with tweezers, a shell containing only the correct pins is obtained; the positioning rod 9 of the bottom plate 1 passes through the positioning hole 10 of the center plate 2 and the cover plate 4 to ensure that there is no relative displacement of the three layers of plates during the pressing process.

[0033] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A B2 enclosure assembly error-proof fixture, comprising a base plate (1), a center plate (2), and a cover plate (4), characterized in that: The center plate (2) is located on the upper surface of the base plate (1). Multiple sets of insertion holes (3) are opened on the upper surface of the center plate (2). The cover plate (4) covers the upper surface of the center plate (2). Multiple sets of square through holes (5) corresponding to the positions of the insertion holes (3) are opened on the outer wall of the cover plate (4). After the cover plate (4) and the center plate (2) are closed, the square through holes (5) and the center plate (2) together form a square cavity (7).

2. The B2 enclosure assembly error-proof fixture according to claim 1, characterized in that: A top pin (11) is detachably connected inside the socket (3), and the top of the top pin (11) protrudes from the upper surface of the center plate (2).

3. The B2 enclosure assembly error-proof fixture according to claim 1, characterized in that: The bottom of the square cavity (7) is fixedly connected to a positioning post (8), which is a cylinder.

4. The B2 casing assembly error-proof fixture according to claim 1, characterized in that: Positioning rods (9) are fixedly connected to the left and right sides of the upper end face of the base plate (1), and positioning holes (10) matching the positioning rods (9) are opened on the outer walls of the left and right sides of the center plate (2) and the cover plate (4).

5. The B2 enclosure assembly error-proof fixture according to claim 1, characterized in that: Each set of square through holes (5) has clearance grooves (6) extending on both sides.

6. The B2 enclosure assembly error-proof fixture according to claim 1, characterized in that: All of the aforementioned sockets (3) are rectangular arrays.

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