A vacuum mounting structure for a power module terminal base

Abstract

This utility model provides a vacuum mounting structure for a power module terminal base, relating to the field of semiconductor packaging technology. The vacuum mounting structure includes: a mounting base; a mounting post, the mounting post being disposed on one end face of the mounting base; a suction head, the suction head being disposed on the end face of the mounting post away from the mounting base; a suction head boss, the suction head boss being disposed on the other end face of the suction head away from the mounting post; and a suction head conical boss, the suction head conical boss being disposed on the end face of the suction head away from the suction head. This utility model's vacuum mounting structure for a power module terminal base, through an improved vacuum suction head structure, allows for material suction and removal from any face of the terminal base, reducing equipment debugging and maintenance. The suction head boss on the other end face of the suction head away from the mounting post, through optimized suction head structure, avoids mechanical conflict caused by vacuum suction between the suction head and the terminal base.

Description

Technical Field

[0001] This utility model belongs to the field of semiconductor packaging technology, and specifically relates to a vacuum mounting structure for a power module terminal base. Background Technology

[0002] Traditional vacuum mounting nozzles are mostly designed for standardized packaging structures, and their adsorption end face shape, vacuum channel distribution and material compatibility are limited. When dealing with new irregular power module terminal bases, they generally face problems such as uneven adsorption force distribution and low contact surface matching, which can easily lead to terminal misalignment, vacuum leakage or local stress concentration during the mounting process, thus affecting the packaging accuracy and yield. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a vacuum mounting structure for a power module terminal base. By innovatively designing the contour-mimicking microstructure of the nozzle end face, optimizing the vacuum flow channel topology layout, and using a gradient elastic modulus composite material, high-precision three-dimensional morphological matching with the irregularly shaped terminal base is achieved. The vacuum mounting structure of this invention breaks through the limitation of the traditional single adsorption mode of the nozzle and significantly improves the mounting reliability and process consistency of complex structure power modules.

[0004] To achieve the above technical objectives, the technical solution adopted by this utility model is as follows:

[0005] A vacuum mounting structure for a power module terminal base, wherein the vacuum mounting structure includes:

[0006] Mounting base;

[0007] The mounting post is disposed on one end face of the mounting base;

[0008] A suction head is disposed on the end face of the mounting post away from the mounting base;

[0009] A suction nozzle boss is located on the end face of the suction nozzle head away from the mounting post.

[0010] The nozzle cone-shaped boss is located on the end face of the nozzle boss away from the nozzle head.

[0011] Preferably, in the vacuum mounting structure of the power module terminal base, the nozzle head is a conical structure with a taper of 20-40°.

[0012] Preferably, in the vacuum mounting structure of the power module terminal base, the suction nozzle protrusion is a cuboid structure, and vacuum adsorption holes are provided around the end face of the suction nozzle protrusion away from the suction nozzle head, with the diameter of the vacuum adsorption holes being 0.15-0.25mm.

[0013] Preferably, in the vacuum mounting structure of the power module terminal base, the end face of the suction nozzle boss is square, the length of the square end face is <1.4mm, and the height of the suction nozzle boss is >0.3mm.

[0014] Preferably, the vacuum mounting structure of the power module terminal base further includes a verticality retaining post, which is disposed on the end face of the nozzle protrusion away from the nozzle head, and the nozzle conical protrusion is disposed on the verticality retaining post.

[0015] Preferably, in the vacuum mounting structure of the power module terminal base, the verticality retaining post is a columnar structure with a height of 0.4-0.6 mm and a diameter of 0.7-0.8 mm.

[0016] Preferably, in the vacuum mounting structure of the power module terminal base, the nozzle conical boss is a conical structure with a taper of 20-40°; the height of the nozzle conical boss is 1.6-2.2 mm and the diameter is 0.7-0.8 mm.

[0017] Preferably, in the vacuum mounting structure of the power module terminal base, the nozzle head is made of phenolic resin; the mounting post and the mounting base are connected by bolts.

[0018] The beneficial effects of this utility model are:

[0019] (1) The vacuum mounting structure of the power module terminal base of this utility model can pick up materials from any surface of the terminal base by improving the vacuum nozzle structure, thereby reducing equipment debugging and maintenance.

[0020] (2) The vacuum mounting structure of the power module terminal base of this utility model has a suction nozzle protrusion on the other end face away from the mounting post. By optimizing the structure of the suction nozzle protrusion, mechanical conflict caused by vacuum adsorption between the suction nozzle and the terminal base is avoided.

[0021] (3) The vacuum mounting structure of the power module terminal base of this utility model has a verticality maintaining post set on the end face of the nozzle protrusion away from the nozzle head. By optimizing the verticality maintaining post, the verticality of the power module terminal base on the nozzle head is guaranteed after the nozzle completes vacuum adsorption and during the operation of the mounting head. The nozzle conical protrusion is set on the verticality maintaining post. The structural design of the nozzle conical protrusion ensures that when the mounting head picks up the material, the nozzle corrects the vertical position offset of the terminal assembly and the nozzle during the pressing process. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the vacuum mounting structure of the power module terminal base of this utility model.

[0023] Figure 2 for Figure 1 A magnified view of part A.

[0024] Figure 3 This is a schematic diagram of the power module terminal base.

[0025] Figure 4 This is a schematic diagram of the structure for the power module terminal base and the vacuum mounting structure.

[0026] Figure 5 for Figure 4 A magnified view of part B. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "inner" and "outer", "upper" and "lower", "front" and "back" is usually based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 limiting the scope of protection of this utility model.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0029] like Figures 1-5 A vacuum mounting structure for a power module terminal base, wherein the vacuum mounting structure includes:

[0030] Mounting base 7;

[0031] Mounting post 1, wherein the mounting post 1 is disposed on one end face of the mounting base 7;

[0032] Suction head 2, wherein the suction head 2 is disposed on the end face of the mounting post 1 away from the mounting base 7;

[0033] A suction nozzle protrusion 3 is disposed on the other end face of the suction nozzle head 2 away from the mounting post 1;

[0034] The nozzle cone-shaped protrusion 6 is located on the end face of the nozzle protrusion 3 away from the nozzle head 2.

[0035] The suction head 2 has a conical structure, and the taper of the suction head 2 is 20-40°.

[0036] The suction nozzle protrusion 3 has a cuboid structure. Vacuum adsorption holes 4 are provided around the end face of the suction nozzle protrusion 3 away from the suction nozzle head 2. The diameter of the vacuum adsorption holes 4 is 0.15-0.25mm.

[0037] The end face of the suction nozzle protrusion 3 is square, the length of the square end face is <1.4mm, and the height of the suction nozzle protrusion 3 is >0.3mm.

[0038] The vacuum mounting structure further includes a verticality retaining post 5, which is disposed on the end face of the nozzle protrusion 3 away from the nozzle head 2. The nozzle conical protrusion 6 is disposed on the verticality retaining post 5. The verticality retaining post 5 is a columnar structure with a height of 0.4-0.6 mm and a diameter of 0.7-0.8 mm. The nozzle conical protrusion 6 is a conical structure with a taper of 20-40°. The height of the nozzle conical protrusion 6 is 1.6-2.2 mm and the diameter is 0.7-0.8 mm.

[0039] The nozzle head 2 is made of phenolic resin; the mounting post 1 and the mounting base 7 are connected by bolts.

[0040] The mounting nozzle is a consumable part that is easily damaged. The mounting post 1 cooperates with the mounting base 7 to realize the quick replacement function of the nozzle. The nozzle head 2 is made of phenolic resin, which has high temperature resistance and Shore hardness of 90-91°, avoiding wear caused by contact with the terminal base.

[0041] The power module terminal base 8 includes a terminal body 9, and terminal bases 10 are provided at both ends of the terminal body 9. Four welding bosses 11 are evenly arranged along the circumferential direction on the end face of the two terminal bases 10 away from the terminal body 9. Power terminal insertion holes 12 are provided on the terminal body 9 and the terminal base 10. The welding bosses 11 are arc-shaped structures, and the outer periphery of the arc structure is consistent with the outer periphery of the terminal base 10. The four welding bosses 11 are symmetrically distributed along the center of the terminal base 10.

[0042] The distance between two adjacent welding bosses 11 of the terminal base 10 is 1.5mm, the height of the welding boss 11 is 0.2mm, and the length of the end face of the suction nozzle boss 3 is <1.4mm and the height of the suction nozzle boss 3 is >0.3mm in order to avoid mechanical conflict caused by vacuum adsorption between the suction nozzle and the terminal base.

[0043] Vacuum adsorption holes 4 are located at the four corners of the suction nozzle protrusion 3, with a hole diameter of 0.2±0.05mm.

[0044] The height of the power module terminal base 8 is 3±0.1mm, and the diameter of the power terminal insertion hole 12 is 0.9mm. The power terminal insertion hole 12 mates with the nozzle conical boss 6 and the verticality retaining post 5. The height of the verticality retaining post 5 is 0.4-0.6mm, and the diameter is 0.7-0.8mm. This design aims to ensure the verticality of the power module terminal base 8 on the nozzle head 2 during the placement head operation after the nozzle completes vacuum adsorption. The height of the nozzle conical boss 6 is 1.6-2.2mm, and the diameter is 0.7-0.8mm. This structural design ensures that when the placement head picks up the material, the nozzle corrects the vertical position offset between the terminal assembly and the nozzle during the downward pressing process. Figure 1 Part A of the middle section.

[0045] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vacuum mounting structure for a power module terminal base, characterized in that, Vacuum mounting structures include: Mounting base (7); Mounting post (1), the mounting post (1) is disposed on one end face of mounting base (7); The suction head (2) is disposed on the end face of the mounting post (1) away from the mounting base (7); A suction nozzle protrusion (3) is provided on the other end face of the suction nozzle head (2) away from the mounting post (1); The nozzle cone-shaped boss (6) is located on the end face of the nozzle boss (3) away from the nozzle head (2).

2. The vacuum mounting structure of the power module terminal base according to claim 1, characterized in that, The suction head (2) has a conical structure and the taper of the suction head (2) is 20-40°.

3. The vacuum mounting structure of the power module terminal base according to claim 1, characterized in that, The suction nozzle protrusion (3) is a cuboid structure. Vacuum adsorption holes (4) are provided around the end face of the suction nozzle protrusion (3) away from the suction nozzle head (2). The diameter of the vacuum adsorption holes (4) is 0.15-0.25mm.

4. The vacuum mounting structure of the power module terminal base according to claim 3, characterized in that, The end face of the suction nozzle protrusion (3) is square, the length of the square end face is <1.4mm, and the height of the suction nozzle protrusion (3) is >0.3mm.

5. The vacuum mounting structure of the power module terminal base according to claim 1, characterized in that, The vacuum mounting structure also includes a verticality retaining post (5), which is located on the end face of the nozzle boss (3) away from the nozzle head (2), and the nozzle cone boss (6) is located on the verticality retaining post (5).

6. The vacuum mounting structure of the power module terminal base according to claim 5, characterized in that, The verticality maintaining column (5) is a columnar structure with a height of 0.4-0.6 mm and a diameter of 0.7-0.8 mm.

7. The vacuum mounting structure of the power module terminal base according to claim 5, characterized in that, The nozzle cone protrusion (6) has a cone-shaped structure, and the taper of the nozzle cone protrusion (6) is 20-40°; the height of the nozzle cone protrusion (6) is 1.6-2.2mm, and the diameter is 0.7-0.8mm.

8. The vacuum mounting structure of the power module terminal base according to claim 1, characterized in that, The nozzle head (2) is made of phenolic resin; the mounting post (1) and the mounting base (7) are connected by bolts.

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