Wedge welding chopper

Abstract

The utility model discloses a wedge welding chopper, which relates to the technical field of welding choppers and comprises a chopper body, one end of the chopper body is a chopper head, the other end of the chopper body is a mounting end, the annular side of the chopper body is provided with a first plane extending from the suspended end of the chopper head to the mounting end, the extending direction of the first plane is consistent with the axial direction of the chopper body, and the annular side of the chopper head is provided with a first inclined surface; the first inclined surface extends from the suspended end of the tool bit to one side far away from the first plane; a second plane is arranged in the annular direction of the mounting end, and the second plane and the first plane are oppositely arranged; when the wedge bonding chopper is used, the first plane and the second plane of the mounting end can be used as positioning flats, and when a high side wall is arranged at the position extremely close to a welding spot and the inclined side of a chopper head of the wedge bonding chopper is close to the side wall, the wedge bonding chopper can be detached and rotated by 180 degrees, then the wedge bonding chopper is mounted on a machine, and then the welding spot is welded, so that the wedge bonding chopper can be mounted on the machine. At the moment, one side of the first plane is close to the side wall, so that welding can be smoothly completed, and the adaptability of the wedge welding chopper is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding splitters, in particular to a wedge welding splitter. Background Art

[0002] The connection between the internal chip and the external pins in semiconductor packaging plays an important role in establishing the electrical connection between the chip and the outside and ensuring the smooth input / output between the chip and the outside world, and is the key in the entire back-end packaging process. Wire bonding dominates the connection methods due to its simple process implementation, low cost, and applicability to various packaging forms. Wire bonding is one of the main interconnection technologies in packaging. Other technologies also include flip chip, wafer-level packaging, and through-silicon via technology. Wire bonding is a method that uses a fine metal wire and utilizes heat, pressure, and ultrasonic energy to tightly weld the metal lead to the substrate pad, realizing the electrical interconnection between the chip and the substrate and the information communication between the chips. The joint shapes of wire bonding mainly include ball (ball Bond) and wedge. Under ideal control conditions, electron sharing or atomic mutual diffusion will occur between the lead and the substrate, so that atomic-level bonding is achieved between the two metals.

[0003] Among them, the splitter is an important tool in the wire bonding process. Specifically, in the ultrasonic metal welding process, the high-frequency vibration wave generated by the welding equipment, such as the splitter of a bonder, is transmitted between the two metal surfaces that need to be welded together. If a certain pressure is applied, mechanical friction will occur between the two metal surfaces to be welded, and then electron sharing or atomic mutual diffusion will occur between the lead and the substrate, promoting atomic-level bonding between the two metal surfaces to achieve the purpose of welding together. This ultrasonic welding technology has the advantages of short welding time, low requirements for the welded metal surface, high fusion strength, good conductivity, no spark, and close to cold-state processing, so it is an ideal metal welding method.

[0004] In order to install and position the existing wedge welding splitters, most of them choose to set a positioning flat on the installation end of the wedge welding splitter to achieve the purpose of installation and positioning. However, this positioning method results in only one fixed installation angle for the wedge welding splitter. During welding, when there is a high side wall very close to the solder joint and the inclined side of the tool tip of the wedge welding splitter is close to the side wall, interference will occur, affecting the processing.

[0005] In view of this, there is an urgent need for a wedge welding splitter to solve the above problems. Summary of the Utility Model

[0006] In view of the problems existing in the prior art, the utility model solves this problem with the following technical structure.

[0007] To achieve the above object, the utility model adopts the following technical solutions:

[0008] A wedge welding tool, comprising: a tool body, one end of the tool body is a tool head, the other end is a mounting end, a first plane extending from a tool head suspension end to the mounting end is arranged on the ring side of the tool body, the extension direction of the first plane is consistent with the axial direction of the tool body, a first inclined surface is arranged on the ring side of the tool head, and the first inclined surface extends from the tool head suspension end to a side away from the first plane;

[0009] A second plane is arranged in the circumferential direction of the mounting end, and the second plane is arranged opposite to the first plane.

[0010] Its further characteristic is that

[0011] Two third planes are arranged circumferentially on the mounting end, and the two third planes are arranged opposite to each other and perpendicular to the first plane and the second plane.

[0012] Arc surfaces are reserved on both sides of the two third planes and the first plane and the second plane.

[0013] The four arc surfaces are all provided with threads that match each other.

[0014] The cutter head is provided with second inclined surfaces on both sides of the first plane and the first inclined surface, and the two second inclined surfaces extend from the suspension end of the cutter head to the sides away from each other.

[0015] The included angle between the first inclined surface and the axial direction of the cutter body is 10 degrees to 20 degrees.

[0016] The included angle between the first inclined surface and the axial direction of the cutter body is 10 degrees.

[0017] The length of the blade body is 16 mm to 30 mm.

[0018] The included angle between the two second inclined surfaces is 15 degrees to 25 degrees.

[0019] The included angle between the two second inclined surfaces is 20 degrees.

[0020] The above structure of the utility model can achieve the following beneficial effects:

[0021] When in use, both the first plane and the second plane of the mounting end can be used as positioning flats. During welding, when there is a high side wall very close to the welding point and the inclined side of the wedge welding knife head is close to the side wall, the wedge welding knife can be removed, rotated 180 degrees, and then the wedge welding knife is installed on the machine, and then the welding point is welded. At this time, one side of the first plane is close to the side wall, so the welding can be completed smoothly, which improves the adaptability of the wedge welding knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of this embodiment;

[0023] Figure 2 This is a structural schematic diagram of another viewing angle of this embodiment;

[0024] Figure 3 Schematic diagram of the structure of the mounting end portion in this embodiment.

[0025] In the figure: 1, cutter head; 2, mounting end; 3, first plane; 4, first inclined plane; 5, second plane; 6, third plane; 7, second inclined plane; 8, arc surface. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, 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 only 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 should fall within the scope of protection of the utility model.

[0027] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0028] The following is combined with Figures 1 - 3 This application is described in further detail.

[0029] like Figures 1 - 3 As shown, a wedge welding tool comprises: a tool body, one end of the tool body is a tool head 1, and the other end is a mounting end 2, a first plane 3 extending from the suspension end of the tool head 1 to the mounting end 2 is arranged on the annular side of the tool body, and the extension direction of the first plane 3 is consistent with the axial direction of the tool body, and a first inclined surface 4 is arranged on the annular side of the tool head 1, and the first inclined surface 4 extends from the suspension end of the tool head 1 to a side away from the first plane 3; a second plane 5 is arranged in the annular direction of the mounting end 2, and the second plane 5 is arranged opposite to the first plane 3. In this way, when in use, the first plane 3 and the second plane 5 of the mounting end 2 can both be used as positioning flats. During welding, when there is a high side wall very close to the welding point, and the inclined side of the tool head of the wedge welding tool is close to the side wall, the wedge welding tool can be removed, rotated 180 degrees, and then the wedge welding tool is installed on the machine, and then the welding point is welded. At this time, one side of the first plane 3 is close to the side wall, so the welding can be completed smoothly, which improves the adaptability of the wedge welding tool.

[0030] like Figures 1 - 3 As shown, two third planes 6 are arranged in the annular direction of the mounting end 2, and the two third planes 6 are arranged opposite to each other and are perpendicular to the first plane 3 and the second plane 5. In this way, the adaptability of the installation of the wedge welding cutter is further improved. The two third planes 6 can also be used as positioning flats (the second plane 5 is at the same distance from the first plane 3 and the two third planes 6 from the axis of the cutter body). Therefore, according to different welding point conditions, the wedge welding cutter can be installed in rotations of 90 degrees, 180 degrees, and 270 degrees.

[0031] like Figures 1 - 3 As shown, arc surfaces 8 are left on both sides of the two third planes 6 and the first plane 3 and the second plane 5, so that no sharp edges are formed between the planes. Of course, mutually matching threads can also be provided on the four arc surfaces 8. By using the threads, positioning and installation at any rotation angle can be achieved on the bonding machine according to actual needs, such as: 69.9 degrees, 184.5 degrees, 255.3 degrees, etc., so that the plane (first plane 3) on one side of the wedge welding cutter inlet can be directed at different angles to achieve the purpose of penetrating into the bottom pad.

[0032] like Figures 1 - 3 As shown, in order to further improve the avoidance ability of the wedge welding cutter, the cutter head 1 is provided with second inclined surfaces 7 on both sides of the first plane 3 and the first inclined surface 4, and the two second inclined surfaces 7 extend from the suspended end of the cutter head 1 to the side away from each other, so that the interference is further reduced. The angle between the two second inclined surfaces 7 is 15 to 25 degrees (for example, 15, 20, 25, etc.). In this embodiment, the angle between the two second inclined surfaces 7 is 20 degrees, and adaptive adjustment is performed according to demand during actual production.

[0033] Further optimization is that the angle between the first bevel 4 and the axial direction of the tool body is 10 degrees to 20 degrees (for example, 10 degrees, 15 degrees, 20 degrees, etc.). In this embodiment, the angle between the first bevel 4 and the axial direction of the tool body is 10 degrees. In actual production, adaptive adjustments are made according to needs.

[0034] It is further optimized that the length of the blade body is adjusted according to actual needs, wherein the length of the blade body is optimally 16 mm to 30 mm (eg 16 mm, 20 mm, 25 mm, 30 mm, etc.).

[0035] In summary, when in use, the first plane 3 and the second plane 5 of the mounting end 2 can both be used as positioning flats. During welding, when there is a high side wall very close to the welding point, and the inclined side of the wedge welding tool head is close to the side wall, the wedge welding tool can be removed, rotated 180 degrees, and then the wedge welding tool is installed on the machine, and then the welding point is welded. At this time, one side of the first plane 3 is close to the side wall, so the welding can be completed smoothly, which improves the adaptability of the wedge welding tool.

[0036] The above are only the preferred embodiments of this application, and the present utility model is not limited to the above embodiments. It can be understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present utility model shall be considered to be included within the protection scope of the present utility model.

Claims

1. A wedge welding tool, characterized in that: Comprising: A tool body, one end of the tool body is a tool tip (1), the other end is a mounting end (2), a first plane (3) extending from the suspended end of the tool tip (1) to the mounting end (2) is provided on the circumferential side of the tool body, the extending direction of the first plane (3) is consistent with the axial direction of the tool body, a first inclined surface (4) is provided on the circumferential side of the tool tip (1), and the first inclined surface (4) extends from the suspended end of the tool tip (1) to the side away from the first plane (3); A second plane (5) is circumferentially provided on the mounting end (2), and the second plane (5) is arranged opposite to the first plane (3); Two third planes (6) are circumferentially provided on the mounting end (2), the two third planes (6) are arranged opposite to each other, and are perpendicular to both the first plane (3) and the second plane (5).

2. A wedge welding tool according to claim 1, characterized in that: Arc surfaces (8) are left between the two sides of the two third planes (6) and the first plane (3) and the second plane (5).

3. A wedge welding tool according to claim 2, characterized in that: Threads that cooperate with each other are provided on all four arc surfaces (8).

4. The wedge welding tool according to claim 1, characterized in that: Second inclined surfaces (7) are provided on both sides of the tool tip (1) with respect to the first plane (3) and the first inclined surface (4), and the two second inclined surfaces (7) extend from the suspended end of the tool tip (1) to the sides away from each other respectively.

5. The wedge welding tool according to claim 1, characterized in that: The included angle between the first inclined surface (4) and the axial direction of the tool body is 10 degrees to 20 degrees.

6. A wedge welding tool according to claim 5, characterized in that: The included angle between the first inclined surface (4) and the axial direction of the tool body is 10 degrees.

7. The wedge welding tool according to claim 1, characterized in that: The length of the tool body is 16 millimeters to 30 millimeters.

8. The wedge welding tool according to claim 4, characterized in that: The included angle between the two second inclined surfaces (7) is 15 degrees to 25 degrees.

9. A wedge welding tool according to claim 8, characterized in that: The included angle between the two second inclined surfaces (7) is 20 degrees.

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