Welding chopper for strip-shaped welding strip
By setting regular protrusions and inward bevels on the pressing surface of the welding cutter head, the problem of slag accumulation in traditional cutting cutters is solved, thereby improving welding quality and cutting cutter life and ensuring weld reliability.
Patent Information
- Application Number
- CN202422874863.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-25
AI Technical Summary
When traditional welding tools are used to weld strips, copper or aluminum strip residues tend to accumulate on the surface, leading to a decline in welding quality. This can result in incomplete welds or broken wires, affecting product performance and reliability.
Design a welding wedge for strip welding strips. The wedge head has a wear-resistant layer and a bonding layer. The pressing surface has regularly arranged protrusions, which can be frustum, pyramid, cylinder or cone. The bonding layer is a metal nitride, and the wear-resistant layer is a tungsten-doped or chromium-doped diamond coating. The two ends of the pressing surface have inward bevels to reduce residue accumulation.
Improving the surface roughness of the weld makes the weld strip easier to detach, reduces metal powder residue, extends the life of the cleaver, and makes the weld joint more reliable.
Smart Images
Figure CN223557578U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to semiconductor packaging technology especially relates to a split knife for welding by strip solder. BACKGROUND
[0002] As a method of wire bonding in semiconductor packaging process, the thick wire wedge bonding has important significance in the field of semiconductor manufacturing. Its operating principle is to use a wedge-shaped tool to directly establish the connection between the chip and the product pin by using aluminum wire, aluminum strip or copper wire as the connection medium. In actual welding operation, ultrasonic energy and pressure are commonly used welding methods.
[0003] However, when it comes to strip-shaped solder (such as copper strip or aluminum strip), a more difficult problem will be encountered. In this welding process, the traditional split knife is prone to accumulate residual materials after copper strip or aluminum strip welding on its surface. As the welding work continues, these residues will continue to accumulate. When the residues accumulate to a certain extent, the welding quality will be severely negatively affected. Specifically, there may be a virtual welding phenomenon, that is, the welding point appears to be connected but does not form a good electrical connection in reality; or there may be a broken wire situation, which leads to the interruption of the entire circuit connection, thereby affecting the performance and reliability of the product.
[0004] In view of this situation, in order to ensure the stability of the strip-shaped solder during the welding process and ensure that the welding work can be carried out smoothly and reach the ideal quality standard, an effective solution is urgently needed to overcome the residue accumulation problem faced by traditional thick wire wedge bonding when welding strip-shaped solder. SUMMARY
[0005] To solve the above problems, the utility model provides a welding split knife for strip-shaped solder, which comprises a knife body and a knife head, the knife head comprises a wear-resistant layer and a bonding layer, the wear-resistant layer is provided with a pressing surface, the bonding layer is arranged between the base material of the knife head and the wear-resistant layer, and the pressing surface is provided with regularly arranged protrusions.
[0006] Further, the protrusions are prisms.
[0007] Further, the protrusions are pyramids.
[0008] Further, the protrusions are cylindrical or circular conical.
[0009] Further, the bonding layer is a metal nitride.
[0010] Further, the bonding layer is tungsten nitride or chromium nitride.
[0011] Further, the wear-resistant layer is a tungsten-doped diamond plating film or a chromium-doped diamond plating film.
[0012] Furthermore, inwardly tapered slopes are provided at both ends of the pressing surface.
[0013] Furthermore, the spacing between the protrusions is 0.5-1.3mm.
[0014] Furthermore, the height of the protrusion is 0.3-0.7mm.
[0015] The beneficial effects of this utility model are as follows:
[0016] 1. Regular protrusions were added to the surface of the cleaver, which improved the surface roughness of the weld and made it easier for the cleaver to detach from the weld strip after welding.
[0017] 2. It reduces the amount of metal powder residue from the solder ribbon on the welding surface of the cleaver, extends the life of the cleaver, and makes the weld joint more reliable. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the cleaving blade of this utility model.
[0020] Figure 2 This is a schematic diagram of a blade protrusion structure according to the present invention.
[0021] Figure 3 This is a schematic diagram of another blade protrusion structure of this utility model.
[0022] Figure 4 This is a schematic diagram of the third type of blade protrusion structure of this utility model.
[0023] Figure 5 This is a schematic diagram of the cutter head with an inwardly tapered bevel.
[0024] Figure Labels
[0025] 1. Blade Body
[0026] 2. Blade head
[0027] 21 Wear-resistant layer
[0028] 22 Bonding Layer
[0029] 23 Pressing surface
[0030] 24 Inward bevel Detailed Implementation
[0031] The following detailed description is presented to enable any person skilled in the art to make and use the application. Various modifications to the embodiments described herein will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application.
[0032] In the following description, reference is made to the accompanying drawings which form a part hereof, and which are shown by way of illustration of several embodiments of the present application. It is understood that other embodiments can be utilized and mechanical, structural, electrical, and operational changes can be made without departing from the spirit and scope of the present disclosure. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of various embodiments of the present application are defined only by the appended patent claims. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Spatially relative terms, such as "upper", "lower", "left", "right", "below", "below", "bottom", "top", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures.
[0033] While in some examples the terms first, second, etc. are used herein to describe various elements or parameters, these elements or parameters should not be limited by these terms. These terms are only used to distinguish one element or parameter from another element or parameter. For example, a first end can be termed a second end, and similarly, a second end can be termed a first end, without departing from the scope of the various described embodiments. Both the first end and the second end are an end, but they are not the same end unless the context clearly indicates otherwise.
[0034] Also, as used in the description herein and throughout this application, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", as used herein, specify the presence of stated features, steps, operations, elements, components, items, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, items, and / or groups thereof. As used herein, the terms "or" and "and / or" are to be interpreted as inclusive, i.e., as meaning one or any combination of items. Thus, "A, B or C" or "A, B and / or C" means any of the following: A; B; C; A and B; A and C; B and C; A, B and C. Only when combinations of elements, functions, steps or operations are inherently mutually exclusive are exceptions to this definition presented.
[0035] Reference is made to Figures 1-5A kind of welding wedge for ribbon solder strip, including tool body 1 and tool head 2, tool head 2 includes having wear-resistant layer 21 and bonding layer 22, the material of bonding layer 22 is metal nitride, such as tungsten nitride, chromium nitride or titanium nitride, wear-resistant layer 21 is corresponding to the material of bonding layer 22 Tungsten-doped diamond plating film, chromium-doped diamond plating film or titanium-doped diamond plating film, such as tungsten-doped diamond plating film is bonding layer 22, it needs to be particularly pointed out that, by the bonding layer 22 between the base material of tool head 2 and wear-resistant layer 21, wear-resistant layer 21 and the base material of tool head 2 better combination, avoid wear-resistant layer 21 fall off;In addition, wear-resistant layer 21 is provided with pressing surface 23, and the pressing surface 23 has regularly arranged protrusions.The protrusions can be arrayed or dot matrix, and the protrusions can be prismatic, pyramidal, cylindrical or circular cone (see Figures 2-4 ), the distance between the protrusions is 0.5-1.3mm, the height of the protrusions is 0.3-0.7mm, and the distance between the protrusions and the height of the protrusions are related to the size of the pressing surface 23 and the welding surface.
[0036] In addition, please refer to Figure 5 In order to match the welding surface of the solder strip or wedge pressing of different size, the inner shrink slope 24 is arranged at both ends of the pressing surface 23 of the wedge, so that the area of the pressing surface can be reduced to meet the size requirements of the welding spot.
[0037] Through the structure of the pressing surface, the wedge can better separate from the solder strip during welding, and the wear-resistant layer on the pressing surface can reduce the accumulation of metal residues and increase the service life of the wedge.
[0038] In the utility model, unless another definite provision and limitation, for example, it can be fixed connection, also can be detachable connection, or be integrated;It can be mechanical connection, also can be electrical connection;It can be directly connected, also can be indirectly connected through intermediate medium, it can be the communication of two elements or the interaction of two elements, unless another definite limitation, for the ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning in the utility model.
[0039] The above is the preferred embodiment of the utility model, it should be pointed out, for the ordinary skilled in the art, on the premise of not departing from the principle of the utility model, still can make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model.
Claims
1. A soldering blade for a strip soldering ribbon, comprising a blade body and a blade head, characterized in that The tool head comprises a wear-resistant layer provided with a pressing surface and a bonding layer arranged between the base material of the tool head and the wear-resistant layer; the pressing surface is provided with regularly arranged protrusions.
2. A soldering blade for a strip solder according to claim 1, characterized in that The protrusions are in the shape of prisms.
3. The soldering blade for a strip solder according to claim 1, characterized in that, The protrusions are in the shape of pyramids.
4. The soldering blade for a strip solder according to claim 1, characterized in that, The protrusions are in the shape of cylinders or circular cones.
5. The soldering blade for a strip solder according to claim 1, characterized in that, The bonding layer is a metal nitride.
6. A soldering blade for a strip solder according to claim 5, characterized in that The bonding layer is tungsten nitride or chromium nitride.
7. A soldering blade for a strip solder according to claim 5, characterized in that The wear-resistant layer is a tungsten-doped or chromium-doped diamond coating.
8. The soldering blade for a strip solder according to claim 1, characterized in that, The pressing surface is provided with inwardly inclined surfaces at both ends.
9. The soldering blade for a strip solder according to claim 1, characterized in that, The distance between the protrusions is 0.5-1.3 mm.
10. The soldering blade for a strip solder according to claim 1, characterized in that The height of the protrusions is 0.3-0.7 mm.