Deep-cavity welding strip welding chopper with rectangular straight-through hole

Abstract

The utility model discloses a deep cavity solder strip welding chopper with a rectangular straight-through hole, which relates to the technical field of welding choppers, and comprises a chopper body, the chopper body comprises a chopper head and a chopper body, the chopper body is provided with the straight-through hole, the straight-through hole extends from one end of the chopper body to the other end of the chopper body, and the section of the straight-through hole in the extending direction is rectangular; a tool nose is arranged at the suspended end of the tool bit, a guide hole is formed in the tool bit and extends from one side of the straight through hole to one side of the tool nose, and the section of the guide hole in the extending direction is rectangular; according to the utility model, the section of the straight through hole in the extension direction is rectangular, wherein the long sides of the rectangle are parallel to the long sides of the gold strip and the aluminum strip; the short edges of the rectangle are parallel to the short edges of the gold strip and the aluminum strip, so that the long edges of the gold strip and the aluminum strip can be completely attached to the long edges of the straight through hole of the rectangular chopper in the strip conveying process of the gold strip and the aluminum strip, and strip conveying is facilitated; meanwhile, during welding, the top collision effect is not prone to occurring, and then the strip jumping phenomenon is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of welding splitters, in particular to a deep cavity welding ribbon welding splitter with a rectangular straight through hole. 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 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 intercommunication between chips. The bonding point shapes of wire bonding mainly include spherical and wedge-shaped. Under ideal control conditions, electron sharing or atomic interdiffusion occurs between the lead and the substrate, thereby achieving atomic-level bonding between the two metals.

[0003] Among them, the splitter is an important tool in the wire bonding process. The wire passes through the wire threading hole on the splitter and reaches the working surface of the tip. The working surface of the tip presses the wire on the pad of the chip. Through the action of ultrasonic vibration and pressure, the wire and the pad form an atomic bond, thereby forming a stable and reliable solder joint between the wire and the chip pad. The wire threading hole (vertical straight through hole) of the existing deep cavity welding ribbon welding splitter generally has a circular cross-section. When the gold ribbon and the aluminum ribbon are fed from top to bottom, there will be a phenomenon of ribbon cutting between the gold ribbon, the aluminum ribbon and the circular straight through hole. The shapes of the gold ribbon, the aluminum ribbon and the circular straight through hole do not match, which is not convenient for ribbon feeding. And during welding, since the rectangular gold ribbon and aluminum ribbon are in the circular straight through hole and do not fit the circular straight through hole, it is easy to form a ribbon skipping phenomenon.

[0004] In view of this, there is an urgent need for a deep cavity welding ribbon welding splitter with a rectangular straight through hole to solve the above problems. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the utility model solves these problems with the following technical structure.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] A deep cavity welding ribbon welding splitter with a rectangular straight through hole, comprising: a tool body, the tool body includes a tool tip and a tool shank, a straight through hole is opened on the tool shank, the straight through hole extends from one end of the tool shank to the other end of the tool shank, and the cross-section of the straight through hole in the extending direction is rectangular;

[0008] The suspended end of the tool tip is provided with a tool point, and a guiding hole is formed in the tool head. The guiding hole extends from one side of the straight through hole to the side of the tool point, and the cross-section of the extending direction of the guiding hole is rectangular.

[0009] Further, it is characterized in that

[0010] A first inclined surface is provided on the tool body, and the first inclined surface extends from the circumferential side of the tool body to the inside of the tool body toward the tool head.

[0011] Second inclined surfaces are provided on both sides of the first inclined surface of the tool body, and the second inclined surfaces extend from the circumferential side of the tool body to the inside of the tool body toward the tool head.

[0012] Two strip-shaped welding surfaces are provided at the suspended end of the tool point.

[0013] A plurality of convex portions are provided on each of the strip-shaped welding surfaces.

[0014] The convex portions are in the shape of hexagonal pyramids.

[0015] A strip-shaped groove is provided between the two strip-shaped welding surfaces.

[0016] The bottom side length of the convex portion is 5 micrometers to 15 micrometers.

[0017] The height of the convex portion is 0.5 times to 1 times the bottom side length.

[0018] The convex portions on each strip-shaped welding surface are arranged adjacent to each other in sequence.

[0019] Adopting the above structure of the present utility model can achieve the following beneficial effects:

[0020] In this application, the cross-section of the straight through hole in the extending direction is rectangular, and the long side of the rectangle is parallel to the long sides of the gold strip and the aluminum strip; the short side of the rectangle is parallel to the short sides of the gold strip and the aluminum strip. In this way, during the belt feeding process of the gold strip and the aluminum strip, the long sides of the gold strip and the aluminum strip can be completely attached to the long side of the rectangular splitting tool's straight through hole, which is beneficial to belt feeding; at the same time, during welding, since the sides of the gold strip and the aluminum strip are attached to the hole wall of the straight through hole, the butting effect is not likely to occur, and thus the phenomenon of belt skipping is not likely to occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of this embodiment;

[0022] Figure 2 is Figure 1 a schematic enlarged view of the structure at A in

[0023] Figure 3 is a schematic structural diagram of the convex portion in this embodiment.

[0024] In the figure: 1, blade head; 2, blade body; 3, straight through hole; 4, blade tip; 5, guide hole; 6, first inclined surface; 7, second inclined surface; 8, strip welding surface; 9, raised portion; 10, strip groove. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] The following is combined with Figures 1-3 This application is described in further detail.

[0028] like Figures 1-2 As shown, a deep cavity welding strip welding splitter with a rectangular straight through hole comprises: a blade body, the blade body comprises a blade head 1 and a blade body 2, a straight through hole 3 is provided on the blade body 2, the straight through hole 3 extends from one end of the blade body 2 to the other end of the blade body 2, and the cross section of the straight through hole 3 in the extending direction is rectangular; a blade tip 4 is provided at the suspended end of the blade head 1, a guide hole 5 is provided on the blade head 1, the guide hole 5 extends from one side of the straight through hole 3 to one side of the blade tip 4, and the cross section of the guide hole 5 in the extending direction is rectangular, so that the cross section of the straight through hole 3 in the extending direction is rectangular, wherein the long side of the rectangle is parallel to the long side of the gold strip and the aluminum strip; the short side of the rectangle is parallel to the short side of the gold strip and the aluminum strip, so that during the feeding process of the gold strip and the aluminum strip, the long side of the gold strip and the aluminum strip can be completely fitted with the long side of the rectangular splitter straight through hole 3, which is conducive to feeding; at the same time, during welding, since the side edges of the gold strip and the aluminum strip are fitted with the hole wall of the straight through hole 3, it is not easy to have a collision effect, and thus it is not easy to have a phenomenon of skipping strips.

[0029] like Figure 1As shown, in order to reduce the interference with other parts during the processing, a first bevel 6 is provided on the blade body 2, and the first bevel 6 extends from the ring side of the blade body 2 to the side of the blade head 1 toward the inner side of the blade body. The blade body 2 is provided with a second bevel 7 on both sides of the first bevel 6, and the second bevel 7 extends from the ring side of the blade body 2 to the side of the blade head 1 toward the inner side of the blade body. In this way, one end of the blade body 2 is converged to one end of the blade head 1, reducing the volume of the blade body 2 close to one end of the blade head 1, thereby reducing interference during processing.

[0030] like Figures 2-3 As shown, the suspended end of the blade tip 4 is provided with two strip welding surfaces 8, and the two strip welding surfaces 8 are divided by a strip groove 10 provided therebetween, and a plurality of protrusions 9 are provided on the strip welding surfaces 8, and the protrusions 9 on each strip welding surface 8 are arranged adjacent to each other in sequence, wherein the optimal shape of the protrusions 9 is a hexagonal pyramid (other shapes, such as a pentagonal pyramid, a triangular pyramid, etc., may also be adopted). By providing two strip welding surfaces 8 and arranging a plurality of protrusions 9 on the two strip welding surfaces 8, the roughness of the blade tip is improved and the uniformity of the roughness of the blade tip is maintained. At the same time, the conical protrusions 9 are easy to penetrate into the gold wire (aluminum wire) or gold belt (aluminum belt) body, and the phenomenon of wire slippage or belt slippage is not easy to occur under the action of ultrasonic vibration; and the protrusions 9 are arranged adjacent to each other in sequence, which improves the gripping force of the gold wire (aluminum wire) or gold belt (aluminum belt), and exhibits strong weldability and operability.

[0031] It is further optimized that, for this embodiment, the optimal size of the protrusion 9 is: the bottom side length of the protrusion 9 is 5 microns to 15 microns; the height of the protrusion 9 is 0.5 times to 1 times the bottom side length. The specific size can be adaptively adjusted according to different processing needs.

[0032] In summary, the cross-section of the straight through hole 3 in the present application in the extension direction is rectangular, wherein the long side of the rectangle is parallel to the long side of the gold tape and the aluminum tape; the short side of the rectangle is parallel to the short side of the gold tape and the aluminum tape, so that during the feeding process of the gold tape and the aluminum tape, the long side of the gold tape and the aluminum tape can be completely in contact with the long side of the rectangular chopping knife straight through hole 3, which is conducive to feeding the tape; at the same time, during welding, since the side edges of the gold tape and the aluminum tape are in contact with the wall of the straight through hole 3, it is not easy to have a collision effect, and thus it is not easy to have the phenomenon of tape jumping.

[0033] The above are only preferred embodiments of the present application, and the present invention is not limited to the above embodiments. It is 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 invention should be considered to be included in the protection scope of the present invention.

Claims

1. A deep cavity welding strip welding cutter with a rectangular straight through hole, characterized in that: include: A knife body, the knife body comprising a knife head (1) and a knife body (2), the knife body (2) being provided with a through hole (3), the through hole (3) extending from one end of the knife body (2) to the other end of the knife body (2), the cross section of the through hole (3) in the extending direction being rectangular; The suspended end of the cutter head (1) is provided with a cutter tip (4), and the cutter head (1) is provided with a guide hole (5), the guide hole (5) extending from one side of the straight hole (3) to one side of the cutter tip (4), and the cross section of the guide hole (5) in the extension direction is rectangular.

2. The deep cavity welding strip welding cutter with a rectangular straight through hole according to claim 1, characterized in that: The blade body (2) is provided with a first inclined surface (6), and the first inclined surface (6) extends from the ring side of the blade body (2) to one side of the blade head (1) and toward the inner side of the blade body.

3. The deep cavity welding strip welding cutter with a rectangular straight through hole according to claim 2, characterized in that: The blade body (2) is provided with second bevels (7) on both sides of the first bevel (6), and the second bevels (7) extend from the ring side of the blade body (2) to one side of the blade head (1) towards the inner side of the blade body.

4. The deep cavity welding strip welding cutter with a rectangular straight through hole according to claim 1, characterized in that: The suspended end of the knife tip (4) is provided with two strip-shaped welding surfaces (8).

5. The deep cavity welding strip welding cutter with a rectangular straight through hole according to claim 4, characterized in that: A plurality of protrusions (9) are provided on the strip-shaped welding surface (8).

6. The deep cavity welding strip welding cutter with a rectangular straight through hole according to claim 5, characterized in that: The protrusion (9) is in the shape of a hexagonal pyramid.

7. The deep cavity welding strip welding cutter with a rectangular straight through hole according to claim 4, characterized in that: A strip-shaped groove (10) is provided between the two strip-shaped welding surfaces (8).

8. The deep cavity welding strip welding cutter with a rectangular straight through hole according to claim 6, characterized in that: The bottom side length of the protrusion (9) is 5 micrometers to 15 micrometers.

9. The deep cavity welding strip welding cutter with a rectangular straight through hole according to claim 8, characterized in that: The height of the protrusion (9) is 0.5 to 1 times the length of the base.

10. The deep cavity welding strip welding cutter with rectangular straight through hole according to claim 5, characterized in that: The raised portions (9) on each of the strip-shaped welding surfaces (8) are arranged adjacent to each other in sequence.

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