Welding chopper for chip welding
By setting a spring in the welding splitter for chip welding to provide stable pressure and force, the problem that existing splitters are difficult to maintain stable pressure during the lead bonding process is solved, and the connection firmness between the leads and solder joints and the product yield rate are improved.
Patent Information
- Application Number
- CN202421538141.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-02
AI Technical Summary
It is difficult for existing splitting knives to maintain stable pressure and force during the lead bonding process, resulting in unsolid connection between the lead and the solder joint, which is prone to poor contact or circuit breaking, affecting the product yield rate.
A welding splitter knife for chip welding is designed. By setting up a mounting groove and a spring at the bottom of the tool holder, the spring applies a downward squeeze pressure to the cutter head, so that the splitter knife maintains a stable pressure and force during the bonding process.
By maintaining stable pressure and force, the connection between the leads and solder joints is improved, the occurrence of poor contact or circuit breaking is reduced, and the product yield rate is improved.
Smart Images
Figure CN222914734U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chip manufacturing, in particular to a welding knife for chip welding. Background Art
[0002] The lead bonding of IC packaging is done by thermal ultrasonic welding, where the lead is fixed to the pad of the substrate with a splitter, and heat and ultrasonic energy are conducted to achieve a tight connection of the lead. When the existing splitter is used, the bottom of the splitter contacts the lead with the solder joint and performs bonding work, but it is difficult to maintain stable pressure and strength during the bonding process, resulting in a loose connection between the lead and the solder joint, which is prone to poor contact or circuit breakage, affecting the product yield. Utility Model Content
[0003] In view of the deficiencies of the prior art, the utility model provides a chip welding welding knife, which solves the technical problem that the prior welding knife is difficult to maintain stable pressure and force during the lead bonding process.
[0004] In order to solve the above-mentioned technical problems, the utility model provides the following technical solutions: a chip welding welding knife, comprising a handle and a knife head movably connected to the bottom of the handle, the bottom of the handle is provided with a mounting groove, the mounting groove is sleeved with a spring, the spring is located between the handle and the knife head, a plurality of notches are provided on the outer wall of the mounting groove, an active cavity is provided inside the knife head, a plurality of sliding protrusions are provided on the inner wall of the active cavity, and the sliding protrusions are movably connected in the notches.
[0005] Preferably, the notch is composed of a disassembly groove, a rotation groove and a sliding groove, and the disassembly groove is connected with the sliding groove through the rotation groove.
[0006] Preferably, the bottom end of the disassembly and assembly groove is an open structure, and the bottom end of the sliding groove is a sealed structure.
[0007] Preferably, the bottom of the cutter head is provided with a right-angle groove and outer inclined surfaces on both sides of the right-angle groove.
[0008] Preferably, a "V"-shaped positioning groove is provided on the bottom surface of the cutter head.
[0009] Preferably, an upper through hole is provided in the knife handle, and a lower through hole is provided in the knife head, and the upper through hole and the lower through hole are located on the same central axis.
[0010] By means of the above technical solution, the utility model provides a chip welding welding knife, which has at least the following beneficial effects:
[0011] 1. The chip welding welding splitter is provided with a spring. When bonding the lead, the cutter head can move on the cutter handle. The spring exerts a downward extrusion force on the cutter head through the elastic effect of the spring. The splitter can maintain a stable pressure and force during the bonding process, making the connection between the lead and the solder joint more firm, less prone to poor contact or circuit breakage, and improving the product yield.
[0012] 2. The chip welding welding knife has a notch, and when the lead is connected, the knife head can move up and down in the sliding groove through the sliding protrusion to improve the firmness of the lead connection. When the sliding protrusion is in the position of the disassembly groove, the knife head part can be removed, which is convenient for replacing the knife head or the spring separately.
[0013] 3. The chip welding soldering knife is provided with a positioning groove, and the positioning groove can provide a more uniform pressure effect on one end of the lead wire, so that the contact effect between the lead wire and the soldering point is better, so as to improve the firmness. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:
[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;
[0016] Figure 2 It is a schematic diagram of the structure of the utility model after being disassembled as a whole;
[0017] Figure 3 This is a schematic diagram of the structure of the knife handle of the utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the bottom of the cutter head of the utility model;
[0019] Figure 5 It is a structural schematic diagram of the top of the cutter head of the utility model.
[0020] Reference numerals:
[0021] 1. Tool handle; 11. Mounting slot; 12. Upper through hole; 13. Disassembly slot; 14. Rotation slot; 15. Sliding slot; 2. Tool head; 21. Movable cavity; 22. Sliding protrusion; 23. Right-angle slot; 24. Lower through hole; 25. External bevel; 26. Positioning groove; 3. Spring. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] Microassembly technology has the characteristics of miniaturization, high integration and high reliability. The performance and service life of microwave components using microassembly technology are significantly improved. Wire bonding is a key technology for realizing electrical interconnection of microwave chip components. The bonding quality directly affects the reliability and stability of the circuit and has a great influence on the microwave characteristics of the circuit. Wire bonding mainly includes two bonding processes: wedge bonding and ball bonding. Among them, wedge bonding wire bonding deforms and diffuses the wire through the bonding surface under the action of energy such as pressure, ultrasonic energy or thermal energy, realizing the information interconnection between the lead and the pad. The correct selection of wedge bonding tools (wedge splitters) is crucial to the microassembly wedge bonding process. The design and selection of wedge splitters are the key links in optimizing the wedge bonding process. The design and selection of wedge splitters are comprehensively affected by multiple factors such as leads, substrates, pads and bonding devices.
[0024] Based on the technical defects of the existing technology that the lead wire connection is not firm due to the difficulty in maintaining stable pressure and strength during the lead wire bonding process, please refer to Figure 1-Figure 5 The utility model provides a chip welding welding splitter, which uses a spring 3 to apply a downward extrusion force to a cutter head 2, so that the splitter can maintain a stable pressure and force during the bonding process, so that the connection between the lead and the solder joint is more secure. The utility model comprises a cutter handle 1 and a cutter head 2 movably connected to the bottom of the cutter handle 1. The bottom of the cutter handle 1 is provided with a mounting groove 11, and a spring 3 is sleeved on the mounting groove 11. The spring 3 is between the cutter handle 1 and the cutter head 2. A plurality of notches are opened on the outer wall of the mounting groove 11. An active cavity 21 is provided inside the cutter head 2. A plurality of sliding protrusions 22 are provided on the inner wall of the active cavity 21. The sliding protrusions 22 are movably connected in the notches. When the lead is bonded, the cutter handle 1 drives the cutter head 2 to move downward, and the cutter head 2 contacts the lead with the solder joint, and then the spring 3 is used to apply pressure to the cutter head 2 to make the lead bond more secure.
[0025] To facilitate the replacement of the cutter head 2 or spring 3, please refer to Figure 3The notch is composed of a disassembly groove 13, a rotation groove 14 and a sliding groove 15. The disassembly groove 13 is connected to the sliding groove 15 through the rotation groove 14. When the sliding protrusion 22 on the cutter head 2 is in the disassembly groove 13, the cutter head 2 can be removed along the disassembly groove 13, and the cutter head 2 or the spring 3 can be replaced. When the sliding protrusion 22 on the cutter head 2 is in the sliding groove 15, the cutter head 2 can move up and down along the sliding groove 15 and cooperate with the spring 3, so that the cutter head 2 can apply elastic pressure to the lead wire, and the setting of the rotation groove 14 can facilitate the rotation of the cutter head 2 for disassembly and assembly.
[0026] In order to facilitate the upward and downward movement of the cutter head 2, the bottom end of the disassembly groove 13 is an open structure, and the bottom end of the sliding groove 15 is a closed structure; the disassembly groove 13 can be used to disassemble the cutter head 2, and the sliding groove 15 can be used to move the cutter head 2 up and down.
[0027] With the development of the chip industry, the spacing between leads on the chip is getting smaller and smaller. In order to ensure that the leads can be bonded smoothly, a right-angle groove 23 and outer bevels 25 on both sides of the right-angle groove 23 are provided at the bottom of the cutter head 2. The volume of the bottom of the cutter head 2 can be reduced so that the surrounding leads are not affected when bonding the leads.
[0028] In order to improve the uniformity of contact between the cutter head 2 and the lead, a "V"-shaped positioning groove 26 is provided on the bottom surface of the cutter head 2; when the lead is welded, one end can be in the positioning groove 26, so that the bottom of the cutter head 2 can squeeze the lead by wrapping it, so that the force applied to the lead is more uniform and the welding effect is better.
[0029] To facilitate the insertion of the lead, an upper through hole 12 is provided in the handle 1, and a lower through hole 24 is provided in the cutter head 2. The upper through hole 12 and the lower through hole 24 are located on the same central axis. With the help of the upper through hole 12 and the lower through hole 24, the lead can be smoothly inserted into the bottom of the cutter head 2 and bonding can be performed.
[0030] It can be seen from the above embodiments that when the lead is fitted, the lead is first inserted into the bottom of the cutter head 2 through the upper through hole 12 and the lower through hole 24, and then one end of the lead is in the positioning groove 26, the handle 1 drives the cutter head 2 to move downward, the cutter head 2 contacts the lead with the welding point, and then the spring 3 is used to apply pressure to the cutter head 2 to make the lead fit more firmly. When the cutter head 2 or the spring 3 needs to be replaced, the cutter head 2 is pushed upward to the top of the sliding groove 15, and then the cutter head 2 is rotated horizontally, the sliding protrusion 22 enters the disassembly groove 13 through the rotating groove 14, and then the sliding protrusion 22 moves downward along the disassembly groove 13, and the cutter head 2 can be removed.
[0031] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.
[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A chip welding welding knife, comprising a knife handle (1) and a knife head (2) movably connected to the bottom of the knife handle (1), characterized in that: The bottom of the knife handle (1) is provided with a mounting groove (11), a spring (3) is sleeved on the mounting groove (11), the spring (3) is located between the knife handle (1) and the knife head (2), a plurality of notches are opened on the outer wall of the mounting groove (11), an active cavity (21) is provided inside the knife head (2), a plurality of sliding protrusions (22) are provided on the inner wall of the active cavity (21), and the sliding protrusions (22) are movably connected in the notches.
2. The chip bonding welder according to claim 1, characterized in that: The notch is composed of a disassembly groove (13), a rotation groove (14) and a sliding groove (15), and the disassembly groove (13) is connected with the sliding groove (15) through the rotation groove (14).
3. The chip bonding welder according to claim 2, characterized in that: The bottom end of the disassembly and assembly groove (13) is an open structure, and the bottom end of the sliding groove (15) is a closed structure.
4. The chip bonding soldering knife according to claim 1, characterized in that: The bottom of the cutter head (2) is provided with a right-angle groove (23) and outer inclined surfaces (25) on both sides of the right-angle groove (23).
5. The chip bonding welder according to claim 1, characterized in that: A V-shaped positioning groove (26) is provided on the bottom surface of the cutter head (2).
6. The chip bonding wedge according to claim 1, characterized in that: The knife handle (1) is provided with an upper through hole (12), and the knife head (2) is provided with a lower through hole (24), and the upper through hole (12) and the lower through hole (24) are located on the same central axis.