Clamp suitable for DBC substrate bonding and bonding equipment comprising same

Abstract

The utility model provides a clamp suitable for DBC substrate bonding and a bonding device comprising the same, the clamp comprises a base plate, a fixing frame and a pressing plate, the fixing frame is fixed on the top of the base plate, the fixing frame is provided with a plurality of placing grooves used for placing DBC substrates, two sides of each placing groove are provided with clamping assemblies located on the top of the base plate, and the pressing plate is fixed on the base plate. The middle of the pressing plate is provided with a channel allowing the fixing frame to penetrate through, the side wall of the pressing plate is provided with a plurality of buffering columns corresponding to the buffering assemblies, and the buffering columns are used for driving the clamping assemblies on the two sides of the containing grooves to clamp the DBC substrates in the corresponding containing grooves. The bonding equipment comprises the clamp suitable for DBC substrate bonding, and the problems that an existing DBC substrate bonding clamp is complex in structure and high in production cost in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece positioning, in particular to a clamp suitable for DBC substrate bonding and a bonding device comprising the clamp. Background Art

[0002] A main structure inside the package of power devices such as IGBT devices is to weld the chip on the DBC substrate, and connect the chip surface with the surface of the DBC substrate through aluminum wire to achieve circuit connection. The DBC substrate is formed by directly bonding copper foil on an alumina or aluminum nitride ceramic substrate, and the IGBT chip can be directly welded and bonded on the DBC substrate.

[0003] Since the two surfaces of the bonding process are basically flat, if one or both surfaces are undulating during the bonding process, it will directly affect the success or strength of the bonding. In order to ensure the quality of bonding, it is often required that the bonded products are stable and cannot shake, so a bonding fixture is needed.

[0004] At present, the mainstream bonding fixtures for DBC substrates are divided into automated bonding fixtures and manual bonding fixtures. The advantages of automated bonding fixtures are obvious, but the disadvantages are: the cost of an automated bonding fixture is too high, and the fixtures still need to be redesigned for different types of products; the traditional manual bonding fixture manually fixes the DBC, so the clamping force depends on the strength of the operator, resulting in poor bonding process consistency, and cracks or damage to the DBC aluminum oxide or aluminum nitride ceramic substrate layer, which consumes a lot of labor and time costs and is not conducive to mass production. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a fixture suitable for DBC substrate bonding and a bonding device comprising the same, which solves the problem of the existing DBC substrate bonding fixture in the prior art having a complex structure and high production cost.

[0006] According to an embodiment of the utility model, a clamp suitable for bonding a DBC substrate comprises: a base plate, a fixed frame and a pressing plate, wherein the fixed frame is fixed on the top of the base plate, and a plurality of placement slots for placing the DBC substrate are arranged on the fixed frame, and clamping assemblies located on the top of the base plate are arranged on both sides of each placement slot, a channel for the fixed frame to pass through is arranged in the middle of the pressing plate, and a plurality of buffer columns corresponding to the buffer assemblies are arranged on the side walls of the pressing plate, and the buffer columns are used to drive the clamping assemblies on both sides of the placement slot to clamp the DBC substrate in the corresponding placement slot.

[0007] Compared with the prior art, the utility model has the following beneficial effects: by arranging clamping assemblies on both sides of each placement groove, when the pressure plate is pressed downward, the buffer columns located on the side walls of the pressure plate drive the clamping assemblies on both sides of the placement groove to clamp the DBC substrate in the placement groove, thereby preventing the DBC substrate from moving during the bonding process, thereby improving the accuracy of the DBC substrate bonding process. At the same time, the DBC substrate bonding fixture has a simple structure, low production cost, and is easy to carry and store.

[0008] Furthermore, each of the clamping assemblies comprises: a fixed seat, a pushing mechanism, a slider and a top block, the fixed seat is fixed to the top of the base plate, the slider is slidably arranged on the top of the base plate, the pushing mechanism is arranged between the slider and the fixed seat, the pushing mechanism is used to push the slider to slide relative to the base plate, one end of the top block is fixed to the side of the slider away from the fixed seat, the other end of the top block passes through the fixed frame and is inserted into the placement groove, and the top block is slidably connected to the fixed frame.

[0009] Furthermore, each of the pushing mechanisms includes: an extrusion seat and an elastic member, wherein the elastic member is vertically fixed between the slider and the fixed seat, the extrusion seat is fixedly connected to the top of the elastic member, one side of the extrusion seat is slidably connected to the fixed seat, the other side of the extrusion seat is tightly attached to the side wall of the slider, and the opposite sides of the extrusion seat and the slider are both inclined surfaces, and the extrusion seat is used to push the slider to slide relative to the bottom plate.

[0010] Furthermore, a protective layer is provided at one end of each of the top blocks which faces away from the extrusion seat.

[0011] Preferably, the protective layer is made of soft material.

[0012] Preferably, the elastic member is a spring or a spring.

[0013] Furthermore, each of the fixing seats is detachably connected to the base plate via screws, and a fixing hole for the screws to pass through is provided on the top of each of the fixing seats.

[0014] Furthermore, it also includes a positioning pin. The fixing frame is provided with a plurality of positioning holes. The positioning pin passes through the positioning holes and is threadedly connected to the bottom plate.

[0015] Furthermore, the buffer column is made of polyurethane soft material.

[0016] A bonding device comprises the above-mentioned clamp suitable for DBC substrate bonding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0018] Figure 2 A three-dimensional diagram of the pressure plate.

[0019] Figure 3 It is the front view of the embodiment of the utility model.

[0020] Figure 4 A perspective view of the clamping assembly.

[0021] Figure 5 An exploded view of the clamping assembly.

[0022] Figure 6 A side view of the clamping assembly.

[0023] Figure 7 A top view of the clamping assembly.

[0024] In the above drawings: 1. bottom plate; 2. fixing frame; 3. placement groove; 4. clamping assembly; 5. pressure plate; 6. buffer column; 7. fixing seat; 8. slider; 9. top block; 10. extrusion seat; 11. elastic member; 12. protective layer; 13. fixing hole; 14. positioning hole; 15. positioning pin. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, an embodiment of the utility model proposes a clamp suitable for bonding of DBC substrates, including: a base plate 1, a fixed frame 2 and a pressing plate 5, wherein the fixed frame 2 is fixed on the top of the base plate 1, and is provided with a plurality of placement grooves 3 for placing the DBC substrates, and both sides of each placement groove 3 are provided with clamping components 4 located on the top of the base plate 1, and the middle part of the pressing plate 5 is provided with a channel for the fixed frame 2 to pass through, and the side walls of the pressing plate 5 are provided with a plurality of buffer columns 6 corresponding to the buffer components, and the buffer columns 6 are used to drive the clamping components 4 on both sides of the placement groove 3 to clamp the DBC substrate in the corresponding placement groove 3.

[0027] By arranging clamping assemblies 4 on both sides of each placement groove 3, when the pressure plate 5 is pressed downward, the buffer columns 6 located on the side walls of the pressure plate 5 drive the clamping assemblies 4 on both sides of the placement groove 3 to clamp the DBC substrate in the placement groove 3, thereby preventing the DBC substrate from moving during the bonding process, thereby improving the accuracy of the DBC substrate bonding process. At the same time, the DBC substrate bonding fixture has a simple structure, low production cost, and is easy to carry and store.

[0028] As an example, Figure 4-7As shown, each of the clamping components 4 includes: a fixed seat 7, a pushing mechanism, a slider 8 and a top block 9. The fixed seat 7 is fixed on the top of the base plate 1, and the slider 8 is slidably arranged on the top of the base plate 1. The pushing mechanism is arranged between the slider 8 and the fixed seat 7. The pushing mechanism is used to push the slider 8 to slide relative to the base plate 1. One end of the top block 9 is fixed to the side of the slider 8 away from the fixed seat 7, and the other end of the top block 9 passes through the fixed frame 2 and is inserted into the placement groove 3, and the top block 9 is slidably connected to the fixed frame 2.

[0029] Each of the pushing mechanisms includes: an extrusion seat 10 and an elastic member 11, wherein the elastic member 11 is vertically fixed between the slider 8 and the fixed seat 7, the extrusion seat 10 is fixedly connected to the top of the elastic member 11, one side of the extrusion seat 10 is slidably connected to the fixed seat 7, and the other side of the extrusion seat 10 is tightly attached to the side wall of the slider 8, and the opposite sides of the extrusion seat 10 and the slider 8 are both inclined surfaces, and the extrusion seat 10 is used to push the slider 8 to slide relative to the base plate 1.

[0030] Specifically, the working principle of the clamping assembly is as follows: when the pressure plate 5 is pressed downward, the buffer column 6 pushes the extrusion seat 10 to move vertically downward, the extrusion seat 10 compresses the elastic member 11, and at the same time, the inclined surface of the extrusion seat 10 pushes the slider 8 to move toward the fixed frame 2, so that the slider 8 pushes the top block 9 to move toward the placement groove 3, and then the top block 9 clamps the DBC substrate located in the placement groove 3, thereby facilitating the bonding processing of the DBC substrate; when the DBC substrate needs to be released, it is only necessary to move the pressure plate 5 vertically upward, and then under the elastic force of the elastic member 11, the extrusion seat 10 moves vertically upward, and finally the top block 9 can be pushed to move horizontally to keep the top block 9 away from the DBC substrate.

[0031] Priority, such as Figure 7 As shown, a protective layer 12 is provided at one end of each top block 9 away from the extrusion seat 10, and the material of the protective layer 12 is selected to be made of soft material to prevent the top block 9 from damaging the DBC substrate due to excessive downward pressure of the pressure plate 5; preferably, the elastic member 11 is a spring or a spring; preferably, the buffer column 6 is a polyurethane soft material; each of the fixed seats 7 is detachably connected to the base plate 1 by screws, and a fixing hole 13 for the screw to pass through is provided on the top of each of the fixed seats 7, so as to facilitate the disassembly of the fixed seat 7, and further, it also includes a positioning pin 15, and a plurality of positioning holes 14 are provided on the fixed frame 2, and the positioning pin 15 passes through the positioning hole 14 and is threadedly connected to the base plate 1, so as to facilitate the disassembly of the fixed frame 2.

[0032] Furthermore, the present invention also provides a bonding device, including the above-mentioned fixture suitable for bonding DBC substrates.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fixture suitable for DBC substrate bonding, characterized in that: include: A base plate (1), a fixed frame (2) and a pressing plate (5), wherein the fixed frame (2) is fixed on the top of the base plate (1), and a plurality of placement grooves (3) for placing DBC substrates are arranged on the fixed frame (2), and clamping assemblies (4) located on the top of the base plate (1) are arranged on both sides of each placement groove (3), and a passage for the fixed frame (2) to pass through is arranged in the middle of the pressing plate (5), and a plurality of buffer columns (6) corresponding to the buffer assemblies are arranged on the side walls of the pressing plate (5), and the buffer columns (6) are used to drive the clamping assemblies (4) on both sides of the placement groove (3) to clamp the DBC substrate in the corresponding placement groove (3).

2. A fixture suitable for DBC substrate bonding as claimed in claim 1, characterized in that: Each of the clamping assemblies (4) comprises: a fixed seat (7), a pushing mechanism, a slider (8) and a top block (9); the fixed seat (7) is fixed on the top of the base plate (1); the slider (8) is slidably arranged on the top of the base plate (1); the pushing mechanism is arranged between the slider (8) and the fixed seat (7); the pushing mechanism is used to push the slider (8) to slide relative to the base plate (1); one end of the top block (9) is fixed on a side of the slider (8) away from the fixed seat (7); the other end of the top block (9) passes through the fixed frame (2) and is inserted into the placement groove (3); and the top block (9) is slidably connected to the fixed frame (2).

3. A fixture suitable for DBC substrate bonding as claimed in claim 2, characterized in that: Each of the pushing mechanisms comprises: an extrusion seat (10) and an elastic member (11); the elastic member (11) is vertically fixed between the slider (8) and the fixed seat (7); the extrusion seat (10) is fixedly connected to the top of the elastic member (11); one side of the extrusion seat (10) is slidably connected to the fixed seat (7); the other side of the extrusion seat (10) is tightly attached to the side wall of the slider (8); and the opposite sides of the extrusion seat (10) and the slider (8) are both inclined surfaces; the extrusion seat (10) is used to push the slider (8) to slide relative to the bottom plate (1).

4. A fixture suitable for DBC substrate bonding as claimed in claim 3, characterized in that: One end of each of the top blocks (9) facing away from the extrusion seat (10) is provided with a protective layer (12).

5. A fixture suitable for DBC substrate bonding as claimed in claim 4, characterized in that: The protective layer (12) is made of soft material.

6. A fixture suitable for DBC substrate bonding as claimed in claim 3, characterized in that: The elastic member (11) is a spring or a spring sheet.

7. A fixture suitable for DBC substrate bonding as claimed in claim 2, characterized in that: Each of the fixing seats (7) is detachably connected to the bottom plate (1) via screws, and a fixing hole (13) for the screws to pass through is provided on the top of each of the fixing seats (7).

8. A fixture suitable for DBC substrate bonding as claimed in claim 1, characterized in that: It also includes a positioning pin (15). The fixing frame (2) is provided with a plurality of positioning holes (14). The positioning pin (15) passes through the positioning holes (14) and is threadedly connected to the bottom plate (1).

9. A fixture suitable for DBC substrate bonding as claimed in claim 1, characterized in that: The buffer column (6) is made of polyurethane soft material.

10. A bonding device, characterized in that: A clamp suitable for DBC substrate bonding comprising the clamp described in any one of claims 1 to 9.

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