Bonding tool

Abstract

The invention belongs to the technical field of lead bonding, and particularly relates to a bonding tool which comprises a supporting table and a fixing assembly, the supporting table is used for placing a module to be bonded, the fixing assembly comprises a pressing plate and a power mechanism, the pressing plate is arranged towards the supporting table, and the power mechanism is arranged on the supporting table. The power mechanism is used for driving the pressing plate to move in the direction close to or away from the supporting table, and a window used for exposing the module is formed in the middle of the pressing plate. Side frame pressing blocks and base plate pressing blocks are arranged on the pressing plate, the side frame pressing blocks are arranged on the two opposite sides of the window on the pressing plate, the base plate pressing blocks are arranged on the other two opposite sides of the window on the pressing plate, and the side frame pressing blocks and the base plate pressing blocks are arranged towards the supporting table and are of elastic telescopic structures. According to the bonding tool, the overall stress pressure distribution of the module is more uniform, the fixing effect is better, the damage to the module is reduced under the condition that the module fixing stability is improved, and the universality is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of wire bonding, and particularly relates to a bonding tooling. Background Art

[0002] The interconnection of module terminal leads is a common circuit connection solution. The side frame and the liner board are connected through leads by ultrasonic bonding. Among them, the design of the fixing tooling for the module during the bonding process is a key link. At present, during bonding, the module is sent to the bonding station, and the side frames of all modules are fixed by pressing plates. Since the bonding operation above needs to be avoided, the power mechanism for driving the pressing plate to move is generally arranged below the bonding station, and the pressing plate is connected through a connecting rod or other structures to drive the pressing plate to move and press all the modules on the bonding station at the same time. However, in the production process of the module, the substrate and the side frame sometimes have slight warping. For example, the substrate warps due to heat during the heating step after the wafer is attached. When the substrate warps, the force exerted by the pressing plate on the side frame of the module is uneven, the fixing of the module is unstable, and it is easy to loosen between the substrate and the side frame, resulting in energy loss during bonding, poor bonding effect, and even direct detachment of the bonding points. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a bonding tooling that makes the pressure distribution on the whole module more uniform, has a good fixing effect, reduces the energy loss during bonding, and has higher versatility.

[0004] The content of the present invention includes a support table and a fixing component. The support table is used to place the module to be bonded. The fixing component includes a pressing plate and a power mechanism. The pressing plate faces the support table. The power mechanism is used to drive the pressing plate to move in a direction close to or away from the support table. And a window for exposing the module is provided in the middle of the pressing plate; Side frame pressing blocks and substrate pressing blocks are arranged on the pressing plate. The side frame pressing blocks are arranged on two opposite sides of the window on the pressing plate, and the number of side frame pressing blocks on a single side of the two opposite sides is at least two. The substrate pressing blocks are arranged on the other two opposite sides of the window on the pressing plate, and the number of substrate pressing blocks on a single side of the other two opposite sides is at least two; Both the side frame pressing blocks and the substrate pressing blocks face the support table and are elastic telescopic structures, and the distance between the end of the substrate pressing block and the support table is less than the distance between the side frame pressing block and the support table.

[0005] Furthermore, the number of the fixing components is the same as the number of modules placed on the support table during bonding, and a single fixing component is used corresponding to a single module.

[0006] Furthermore, the power mechanism in a single fixed component includes two linear drive members, which are correspondingly located on both sides of the support platform, and the output ends of the two linear drive members are connected to both ends of the pressing plate in a single fixed component.

[0007] Furthermore, a bottom plate is further included, the support platform is arranged on the bottom plate, and the two linear drive members are arranged on the bottom plate and located on both sides of the support platform.

[0008] Furthermore, the elastic telescopic structure includes a guide post, a pressing head, and a spring. The guide post can move in the thickness direction of the pressing plate. The pressing head is arranged at one end of the guide post facing the support platform. The spring is sleeved on the guide post, and the spring is compressed when the guide post moves away from the support platform on the pressing plate.

[0009] Furthermore, a flexible material is arranged on the surface of the pressing block facing the support platform.

[0010] Furthermore, there are two substrate pressing blocks arranged on the same side of the window, and the two substrate pressing blocks are correspondingly located at both ends of this side of the window.

[0011] Furthermore, two connecting seats are arranged on both sides of the window for arranging the substrate pressing blocks. All the connecting seats extend towards the inside of the window. The two substrate pressing blocks on the same side of the window are arranged on the two connecting seats on this side of the window.

[0012] Furthermore, adjacent side frame pressing blocks on the same side of the window are arranged at intervals to form a clearance area.

[0013] Furthermore, mounting bosses extend towards the inside of the window on both sides of the window for arranging the side frame pressing blocks. The side frame pressing blocks on the same side of the window are all arranged on the mounting bosses on this side of the window.

[0014] The beneficial effect of the present invention is that when the pressing plate moves towards the support platform, it drives all the side frame pressing blocks and substrate pressing blocks to move. Several side frame pressing blocks and several substrate pressing blocks distributed on different sides of the window form a multi-point pressing structure on different sides of the window, simultaneously fixing the side frame and the substrate. The pressure distribution of the overall module is more uniform and the fixing effect is better.

[0015] Since both the side frame pressing block and the substrate pressing block are elastically telescopic structures, even if the side frame and the substrate are slightly warped due to previous processes, the side frame pressing block and the substrate pressing block can use elastic force to press the side frame and the substrate after deformation or attitude change, ensuring the uniform pressure on the side frame and the substrate, maintaining the relative fixation between the side frame and the substrate, thus ensuring the stability of the overall fixation of the module, greatly reducing the energy loss during bonding, and improving the bonding effect and quality. Moreover, on the basis of maintaining the relative fixation between the side frame and the substrate, the force applied to the side frame or the substrate alone can be smaller, that is, the pressure of the pressing plate can be smaller, which can reduce the damage to the module while improving the fixation stability of the module.

[0016] And because the overall structure forms a multi-point pressing structure on the module instead of an overall pressing structure, it has greater flexibility in use, a larger avoidance space, is conducive to accommodating different modules of the same size, has higher versatility, and improves the applicable range. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the bonding tooling of the present invention.

[0018] Figure 2 It is a top view of the bonding tooling of the present invention.

[0019] Figure 3 It is a schematic structural diagram of one setting method of the elastic telescopic structure of the present invention.

[0020] In the figure: 1, bottom plate; 2, support platform; 3, pressing plate; 31, mounting boss; 4, side frame pressing block; 5, substrate pressing block; 51, guide post; 52, pressing head; 53, spring; 6, linear driving member; 32, connecting seat; 100 - module. Detailed Embodiment

[0021] As Figures 1 - 3 shown, the present invention includes a support platform 2 and a fixing component. The support platform 2 is used to place the module 100 to be bonded, and the fixing component is used to fix the module 100 before bonding. The fixing component includes a pressing plate 3 and a power mechanism. The pressing plate 3 is arranged towards the support platform 2. The power mechanism is used to drive the pressing plate 3 to move towards or away from the support platform 2. And a window for exposing the module 100 is provided in the middle of the pressing plate 3 for subsequent bonding operations.

[0022] A side frame pressing block 4 and a substrate pressing block 5 are arranged on the pressing plate 3. The side frame pressing block 4 and the substrate pressing block 5 move along with the pressing plate 3. The side frame pressing block 4 is used to press the side frame of the module 100, and the substrate pressing block 5 is used to press the substrate of the module 100. The side frame pressing blocks 4 are arranged on two opposite sides of the pressing plate 3 relative to the window, and the number of side frame pressing blocks 4 on one side of the two opposite sides is at least two, that is, several side frame pressing blocks 4 are provided. The several side frame pressing blocks 4 are divided into two groups and are correspondingly arranged on two opposite sides of the window. The substrate pressing blocks 5 are arranged on the other two opposite sides of the window, and the number of substrate pressing blocks 5 on one side of the other two opposite sides is at least two. Several substrate pressing blocks 5 are provided. The several substrate pressing blocks 5 are divided into two groups and are correspondingly arranged on the other two opposite sides of the window.

[0023] Both the side frame pressing block 4 and the substrate pressing block 5 face the support table 2 and are both elastic telescopic structures. When subjected to an external force, they can produce a certain deformation or posture change, and use the elastic force to generate a reaction force to press tightly. Since the side frame is arranged on the substrate when the module 100 is bonded, the distance between the end of the substrate pressing block 5 and the support table 2 is set to be less than the distance between the side frame pressing block 4 and the support table 2, that is, there is a height difference between the end of the substrate pressing block 5 and the end of the side frame pressing block 4. When the pressing plate 3 moves towards the support table 2, the side frame pressing block 4 presses the side frame and the substrate pressing block 5 presses the substrate at the same time.

[0024] For the bonding tooling provided by the present invention, when the pressing plate 3 moves towards the support table 2, it drives all the side frame pressing blocks 4 and the substrate pressing blocks 5 to move. The several side frame pressing blocks 4 and the several substrate pressing blocks 5 distributed on different sides of the window form a multi-point pressing structure on different sides of the window, simultaneously fixing the side frame and the substrate. The pressure distribution of the overall force on the module 100 is more uniform, and the fixing effect is better. Since both the side frame pressing block 4 and the substrate pressing block 5 are elastic telescopic structures, even if the side frame and the substrate are slightly warped due to the previous process, the side frame pressing block 4 and the substrate pressing block 5 can use the elastic force to press the side frame and the substrate after deformation or posture change, ensuring the uniformity of the pressure on the side frame and the substrate, maintaining the relative fixation between the side frame and the substrate, thereby ensuring the stability of the overall fixation of the module 100, greatly reducing the energy loss during bonding, and improving the bonding effect and quality. And on the basis of maintaining the relative fixation between the side frame and the substrate, the force applied to the side frame or the substrate alone can be smaller, that is, the pressure of the pressing plate 3 can be smaller, which can reduce the damage to the module 100 while improving the fixing stability of the module 100.

[0025] And because the overall forms a multi-point pressing structure on the module 100 instead of an overall pressing structure, the flexibility of use is greater, the avoidance space is larger, which is conducive to being compatible with different modules 100 of the same size, the versatility is higher, and the applicable range is improved.

[0026] The number of the fixing components is the same as the number of modules 100 placed on the support table 2 during bonding, and a single fixing component is used corresponding to a single module 100. That is, the fixing components and the modules 100 are used in a one-to-one manner. For example, Figure 1 and Figure 2 as shown, when the number of modules 100 placed on the support table 2 during bonding is two, the number of the fixing components correspondingly is two. Compared with the method of using one fixing component to fix more than two modules 100, the present invention is an independent press-fitting structure of a single fixing component for a single module 100, which is beneficial to improving the control accuracy. Moreover, the size of a single pressing plate 3 is smaller, and it is less likely to deform under the same material and thickness, with good rigidity, further reducing the energy loss during bonding.

[0027] The power mechanism in a single fixing component includes two linear driving members 6. As Figure 1 shown, the two linear driving members 6 are correspondingly located on both sides of the support table 2, and the output ends of the two linear driving members 6 are connected to both ends of the pressing plate 3 in a single fixing component. Compared with the method of arranging the power mechanism under the support table and driving the pressing plate 3 to move by using a connecting rod structure, the distance between the output end of the linear driving member 6 and the pressing plate 3 in the present invention is short, and the force transmission is more stable, which is beneficial to ensuring the moving accuracy of both ends of the pressing plate 3 and avoiding the problem of moving deviation at both ends of the pressing plate 3 caused by low transmission stability due to a long distance. Among them, the linear driving member 6 can be a cylinder, an oil cylinder or an electric cylinder, as long as it can meet the linear movement of the lifting of the pressing plate 3.

[0028] The present invention further includes a bottom plate 1, the support table 2 is arranged on the bottom plate 1, and the two linear driving members 6 are arranged on the bottom plate 1 and located on both sides of the support table 2. The bottom plate 1 is used to support the whole tooling and facilitate the installation of the linear driving member 6 and the support table 1. By setting installation holes on the bottom plate 1, it is convenient to install the whole tooling in the bonding station for use.

[0029] Based on the foregoing content, both the side frame pressing block 4 and the substrate pressing block 5 are elastic telescopic structures. In some setting methods, the elastic telescopic structure is an elastic material such as rubber. Although it can meet the elastic deformation requirements, due to its relatively high softness and small overall rigidity, the reverse acting force on the side frame or the substrate will be relatively small, and the stability during press-fitting needs to be improved.

[0030] In the preferred setting method of the present invention, as Figure 3As shown, the elastic telescopic structure includes a guide post 51, a pressure head 52 and a spring 53. The guide post 51 can move in the thickness direction of the pressing plate 3. The pressure head 52 is arranged at one end of the guide post 51 facing the support platform 2. The spring 53 is sleeved on the guide post 51. When the guide post 51 moves away from the support platform 2 on the pressing plate 3, the spring 53 is compressed. Among them, the cooperation form between the guide post 51 and the pressing plate 3 is that a limiting platform is arranged at the upper end of the guide post 51, and a guide hole is arranged along the thickness direction on the pressing plate 3. The upper end of the guide post 51 is inserted into the guide hole. When the guide post 51 moves in the thickness direction of the pressing plate 3, the guide post 51 moves axially. At this time, the limiting platform moves in the guide hole, and the diameter of the lower end of the guide hole is reduced to form a stepped structure for limiting the lowest stroke of the limiting platform to prevent the whole guide post 51 from falling out. The specific number of the guide holes is the same as the number of the elastic telescopic structures.

[0031] In this preferred setting method, the reverse acting force provided by the compression of the spring 52 acts on the pressure head 52 to press the side frame or the substrate. Since the softness of the rubber is relatively high and the deformation ability is greater when the cross-sectional area remains unchanged and the height dimension increases, for the case where the overall height of the elastic telescopic structure is relatively large, the setting method of the guide post 51, the pressure head 52 and the spring 53 has better overall rigidity compared with the method of directly using rubber as a whole, and the reverse acting force applied to the side frame or the substrate is relatively greater, and the stability during pressing is higher, which is more suitable for the use of the substrate pressing block 5. Therefore, in the present invention, it is preferred that both the side frame pressing block 4 and the substrate pressing block 5 are elastic telescopic structures composed of a guide post 51, a pressure head 52 and a spring 53. When the side frame pressing block 4 or the substrate pressing block 5 is the elastic telescopic structure provided by this embodiment, the pressure head 52 is the end of the side frame pressing block 4 or the substrate pressing block 5. In other embodiments, the side frame pressing block 4 can select other elastic telescopic structures, but the substrate pressing block 5 is preferably an elastic telescopic structure composed of a guide post 51, a pressure head 52 and a spring 53.

[0032] Among them, a flexible material, such as a material with flexible properties such as silica gel and soft rubber, is arranged on the surface of the pressing block 52 facing the support platform 2 to ensure pressing without damaging the surface of the module.

[0033] In the invention, there are two substrate pressing blocks 5 arranged on the same side of the window, and the two substrate pressing blocks 5 are correspondingly located at both ends of this side of the window. That is, a total of four substrate pressing blocks 5 are provided, and the four substrate pressing blocks 5 are used to press the four corners of the substrate respectively to maintain the pressing stability of the substrate while avoiding the side frame.

[0034] On both sides of the window for arranging the substrate pressing blocks 5, two connecting seats 32 are provided, and all the connecting seats 32 extend towards the inside of the window. The two substrate pressing blocks 5 on the same side of the window are arranged on the two connecting seats 32 on this side of the window. Such as Figure 1 and Figure 2As shown, in this setting method, while ensuring that the substrate pressing block 5 can effectively press on the substrate, it can avoid the side frame parts on both sides, will not block the side frame parts on both sides, ensure the effective range of the window, and will not affect the normal operation of bonding. When the substrate pressing block 5 is preferably an elastic telescopic structure composed of a guide post 51, a pressing head 52 and a spring 53, the corresponding guide hole is arranged on the connecting seat 32.

[0035] In the present invention, the number of side frame pressing blocks 4 on the same side of the window can be determined according to the specifications of a variety of mainstream modules 100 of the same size in the combination, such as setting six or three. Preferably, they are arranged at intervals between the side frame pressing blocks 4 on the same side of the window, forming a clearance area to avoid structures such as electrodes and leads on the side frame.

[0036] On both sides of the window for arranging the side frame pressing blocks 4, installation bosses 31 extend inwardly towards the inside of the window. The side frame pressing blocks 4 on the same side of the window are all arranged on the installation bosses 31 on this side of the window. The size of the installation boss 31 can be determined according to the size and number of the side frame pressing blocks 4 required for actual installation. When the side frame pressing block 4 is an elastic telescopic structure composed of a guide post 51, a pressing head 52 and a spring 53, the corresponding guide hole is installed on the installation boss 31.

[0037] Those of ordinary skill in the art should understand that: the discussion of any above embodiment is only exemplary, and is not intended to imply that the protection scope of this application is limited to these examples; under the idea of this application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments in the present application as described above, and they are not provided in detail for the sake of brevity.

[0038] One or more embodiments of this application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this application shall be included within the protection scope of this application.

Claims

1. A bonding tooling, characterized in that, It includes a support platform (2) and a fixing component. The support platform (2) is used to place the module (100) to be bonded. The fixing component includes a pressing plate (3) and a power mechanism. The pressing plate (3) is arranged facing the support platform (2). The power mechanism is used to drive the pressing plate (3) to move in a direction close to or away from the support platform (2), and a window for exposing the module (100) is provided in the middle of the pressing plate (3). Side frame pressing blocks (4) and substrate pressing blocks (5) are provided on the pressing plate (3). The side frame pressing blocks (4) are arranged on two opposite sides of the window on the pressing plate (3), and the number of side frame pressing blocks (4) on one side of the two opposite sides is at least two. The substrate pressing blocks (5) are arranged on the other two opposite sides of the window on the pressing plate (3), and the number of substrate pressing blocks (5) on one side of the other two opposite sides is at least two. Both the side frame pressing blocks (4) and the substrate pressing blocks (5) are arranged facing the support platform (2) and are both elastic telescopic structures, and the distance between the end of the substrate pressing block (5) and the support platform (2) is less than the distance between the side frame pressing block (4) and the support platform (2).

2. The bonding tooling according to claim 1, characterized in that, The number of the fixing components is the same as the number of modules (100) placed on the support platform (2) during bonding, and a single fixing component is used corresponding to a single module (100).

3. The bonding tooling according to claim 2, characterized in that, The power mechanism in a single fixing component includes two linear driving members (6). The two linear driving members (6) are correspondingly located on both sides of the support platform (2), and the output ends of the two linear driving members (6) are connected to both ends of the pressing plate (3) in a single fixing component.

4. The bonding tooling according to claim 3, characterized in that, It further includes a bottom plate (1). The support platform (2) is arranged on the bottom plate (1), and two linear driving members (6) are arranged on the bottom plate (1) and are located on both sides of the support platform (2).

5. The bonding tooling according to any one of claims 1-4, characterized in that, The elastic telescopic structure includes a guide post (51), a pressing head (52) and a spring (53). The guide post (51) can move in the thickness direction of the pressing plate (3). The pressing head (52) is arranged at one end of the guide post (51) facing the support platform (2). The spring (53) is sleeved on the guide post (51). When the guide post (51) moves in the pressing plate (3) in a direction away from the support platform (2), the spring (53) is compressed.

6. The bonding tooling according to claim 5, characterized in that, A flexible material is provided on the surface of the pressing block (52) facing the support platform (2).

7. The bonding tooling according to any one of claims 1-4, 6, characterized in that, There are two substrate pressing blocks (5) arranged on the same side of the window, and the two substrate pressing blocks (5) are correspondingly located at both ends of this side of the window.

8. The bonding tooling according to claim 7, characterized in that, Two connecting seats (32) are provided on each of the two sides of the window for arranging the substrate pressing blocks (5). All the connecting seats (32) extend towards the inside of the window. The two substrate pressing blocks (5) on the same side of the window are arranged on the two connecting seats (32) on this side of the window.

9. The bonding tooling according to any one of claims 1-4, 6, 8, characterized in that, The adjacent side frame pressing blocks (4) on the same side of the window are arranged at intervals to form a clearance area.

10. The bonding tooling according to any one of claims 1-4, 6, 8, characterized in that, Installation bosses (31) extend towards the inside of the window on both sides of the window for arranging the side frame pressing blocks (4). The side frame pressing blocks (4) on the same side of the window are all arranged on the installation bosses (31) on this side of the window.

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