CN217647665U - Automatic wedge welding chopper - Google Patents
Automatic wedge welding chopper Download PDFInfo
- Publication number
- CN217647665U CN217647665U CN202220994565.6U CN202220994565U CN217647665U CN 217647665 U CN217647665 U CN 217647665U CN 202220994565 U CN202220994565 U CN 202220994565U CN 217647665 U CN217647665 U CN 217647665U
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- Prior art keywords
- hole
- chopper
- face
- bonding
- riving knife
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/74—Apparatus for manufacturing arrangements for connecting or disconnecting semiconductor or solid-state bodies and for methods related thereto
- H01L2224/78—Apparatus for connecting with wire connectors
Abstract
The utility model discloses an automatic wedge welding chopper belongs to microelectronics packaging field, reach the tool bit that links to each other with the main part including cylindric chopper main part, the chopper main part is equipped with cylindrical through-hole along the ascending central point of length direction puts, wherein one side is connected with the tool bit on the diameter direction, and the opposite side is equipped with the unfilled corner of step form, and tool bit one end links to each other with the chopper main part, and the terminal surface of the other end is the bonding face, is equipped with semi-cylindrical recess on the bonding face, and tool bit inside is equipped with oblique pin hole, and its two hypotenuses form certain contained angle, and the one end that oblique pin hole is close to central through-hole is equipped with loudspeaker form transition hole, and the other end is equipped with the guide way. The utility model has the advantages of simple integral structure, can show reduction processing cost, and behind two limits of the oblique pin hole of chopper tool bit formed certain contained angle, the home range of bonding silk can further be retrained to the guide way of cooperation different shapes, is favorable to improving the silk precision of sending when automatic bonding, avoids appearing the tail silk overlength, phenomenons such as solder joint skew.
Description
Technical Field
The utility model belongs to the microelectronics packaging field, in particular to automatic wedge welding chopper.
Background
Wedge bonding is an important link in the field of microelectronic packaging, and metallurgical bonding is formed between a metal bonding wire and a bonding pad under the action of a chopper through certain temperature, pressure and ultrasonic energy. The existing commercial chopper product is provided with a V-shaped through groove at the outlet of a wire leading hole on a chopper head, but the wire outlet direction of a bonding wire is easy to deviate after multiple times of bonding, the phenomena of overlong tail wire, deviation or defect of a welding point and the like occur, and the position of the bonding wire needs to be manually adjusted. However, for a full-automatic bonding machine, the bonding speed is high, manual adjustment is difficult to perform in time, the welding effect is unstable, and the reliability of a final product is affected. Therefore, for a full-automatic bonding machine, the structure of the outlet of the wire hole on the tool bit of the riving knife needs to be improved at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the easy skew of bonding wire play silk direction after the above-mentioned bonding, appear tail silk overlength, solder joint skew or defective scheduling problem and provide an automatic wedge-welded chopper, automatic wedge-welded chopper includes cylindric chopper main part and the wedge tool bit that links to each other with the main part, a serial communication port, the central point that the chopper main part was followed length direction is put and is equipped with cylindrical through-hole, is connected with the tool bit along one of them side on the diameter direction, and the opposite side is equipped with the unfilled corner of step form, and the step height is less than chopper main part radius and the difference of central through-hole radius, tool bit one end links to each other with the chopper main part, and the terminal surface of the other end is the bonding face, and the bonding face links to each other through inside and outside two scarf with chopper main part lateral wall, is equipped with semi-cylindrical recess on the bonding face, and recess length direction is perpendicular with the direction of step form unfilled corner, the inside oblique pin hole that is equipped with of tool bit, and the one end that the oblique pin hole is close to central through-hole is equipped with loudspeaker form transition hole, and the other end is equipped with the guide way, and guide way slot bottom face and oblique pin hole meets with the bonding face, and another side links to each other is located on the oblique pin face.
The guide groove and the inclined lead hole are connected with each other, and the included angle of the two surfaces is 90 degrees.
The opening of the guide groove on the inner oblique cutting surface is in any shape of circle, ellipse, rectangle, pentagon or hexagon.
The axis of the horn-shaped transition hole is coincided with the axis of the inclined lead hole, and the included angle between the horn-shaped transition hole and the length direction of the main body of the riving knife is 20-70 degrees.
The included angles between the two bevel edges of the horn-shaped transition hole and the axial lead of the horn-shaped transition hole are equal, the included angles are 20-60 degrees, and the included angles between the two bevel edges of the inclined lead hole and the axial lead of the inclined lead hole are equal, and the included angles are 0-15 degrees.
The included angles of the inner chamfer plane and the outer chamfer plane and the length direction of the main body of the riving knife are 90 degrees together, wherein the included angle of the inner chamfer plane and the length direction of the main body of the riving knife is 0-30 degrees.
The utility model has the advantages that:
(1) After a certain included angle is formed between two sides of the inclined lead hole of the chopper head, the movable range of the bonding wire can be further restricted by matching with the guide grooves in different shapes, the control capability of the bonding wire during automatic bonding is favorably enhanced, the wire feeding precision is improved, and the phenomena of overlong tail wire, deviation of welding spots and the like are avoided.
(2) The utility model discloses simple structure compares current riving knife and has reduced the unnecessary structure of part, can show reduction processing cost.
Drawings
FIG. 1 is a schematic view of an automatic wedge welding cleaver.
FIG. 2 is an enlarged view of a portion of the riving knife head of FIG. 1.
The reference numbers in the figures are as follows:
1-a cleaver main body, 11-a central through hole, 12-a step-shaped unfilled corner, 2-a tool bit, 21-a bonding surface, 22-an outer chamfered surface, 23-an inner chamfered surface, 24-a cylindrical groove, 25-an inclined lead hole, 26-a horn-shaped transition hole and 27-a guide groove.
Detailed Description
The utility model provides an automatic wedge welding riving knife, it is right below to combine the figure and embodiment the utility model discloses carry out the detailed description.
Fig. 1 is a schematic structural view of an automatic wedge-welding riving knife. FIG. 2 illustrates an enlarged view of a portion of the riving knife head. The automatic wedge welding chopper comprises a cylindrical chopper main body 1 and a cutter head 2 connected with the main body, wherein a cylindrical central through hole 11 is formed in the center of the chopper main body 1 in the length direction, one side of the chopper main body is connected with the cutter head 2 in the diameter direction, a step-shaped unfilled corner 12 is formed in the other side of the chopper main body, and the step height is smaller than the difference between the radius of the chopper main body 1 and the radius of the central through hole 11.
The one end of tool bit 2 links to each other with chopper main part 1, and the terminal surface of the other end is bonding face 21, and bonding face 21 passes through outer scarf 22 with the lateral wall of chopper main part 1 and links to each other with interior scarf 23, is equipped with semi-cylindrical recess 24 on the bonding face 21, and recess length direction is perpendicular with the direction of height of step form unfilled corner 12, tool bit inside is equipped with oblique pin hole 25, and the one end that oblique pin hole 25 is close to central through-hole 11 is equipped with loudspeaker form transition hole 26, and the other end is equipped with guide way 27, and guide way 27 bottom surface and a side meet with oblique pin hole, and another side links to each other with bonding face 21, and the opening face is located interior scarf 23.
The opening of the guide groove 27 on the inner chamfered surface is in any one of a circular shape, an oval shape, a rectangular shape, a pentagonal shape and a hexagonal shape.
Examples
As shown in fig. 1 and 2, in the structure of the automatic wedge-welding riving knife, the included angle between the outer chamfer 22 and the length direction of the riving knife body 1 is 10 degrees, and the included angle between the inner chamfer 23 and the length direction of the riving knife body 1 is 80 degrees. The inside inclined lead hole 25 that is equipped with of tool bit 2, its axial lead and the length direction contained angle of cleaver main part 1 are 45, the contained angle of two hypotenuses and its axial lead is 10, the one end that inclined lead hole 25 is close to central through-hole 11 is equipped with tubaeform transition hole 26, its axial lead and the coincidence of the axial lead of inclined lead hole 25, and two hypotenuses and axial lead contained angle are 22.5, the other end is equipped with guide way 27, the two sides contained angle that guide way 27 and inclined lead hole 25 meet is 90, another side links to each other with bonding face 21, the opening face is the rectangle, be located interior scarf 23. When automatic keying is carried out, the bonding wire penetrates through the central through hole 11, penetrates out of the horn-shaped transition hole 26 and the inclined lead hole 25 and is sent to the bonding surface 21, so that after a certain included angle is formed between two sides of the inclined lead hole 25, the movable range of the bonding wire can be further restricted by the matching guide groove 27, and the control capability of the automatic keying on the bonding wire is enhanced.
Claims (6)
1. The automatic wedge welding chopper is characterized in that a cylindrical through hole is formed in the center of the chopper body in the length direction, one side of the chopper body is connected with the chopper head in the diameter direction, a step-shaped unfilled corner is formed in the other side of the chopper body, the step height is smaller than the difference between the radius of the chopper body and the radius of the central through hole, one end of the chopper head is connected with the chopper body, the end face of the other end of the chopper body is a bonding face, the bonding face is connected with the side wall of the chopper body through an inner chamfered face and an outer chamfered face, a semi-cylindrical groove is formed in the bonding face, the length direction of the groove is perpendicular to the height direction of the step-shaped unfilled corner, an inclined lead hole is formed in the chopper body, a horn-shaped transition hole is formed in one end, close to the central through hole, a guide groove is formed in the other end of the inclined lead hole, the bottom face and one side face of the guide groove are connected with the bonding face, and the opening face is located on the inner chamfered face.
2. The automatic wedge welding riving knife of claim 1 wherein the angle between the two faces of the guide slot and the angled wire hole is 90 °.
3. The automatic wedge welding riving knife of claim 1 wherein the opening of the guide slot on the inner chamfer is any one of circular, oval, rectangular, pentagonal or hexagonal in shape.
4. The automatic wedge welding riving knife of claim 1 wherein the flared transition hole coincides with the axis of the angled feed-through hole and forms an angle of 20-70 ° with the length of the riving knife body.
5. The automatic wedge welding riving knife of claim 1, wherein the included angle between the two bevel edges of the horn-shaped transition hole and the axial lead thereof is equal, the included angle is 20 degrees to 60 degrees, and the included angle between the two bevel edges of the inclined lead hole and the axial lead thereof is equal, the included angle is 0 degrees to 15 degrees.
6. The automatic wedge welding riving knife of claim 1 wherein the angle of the inner and outer chamfer angles to the length direction of the riving knife body add up to 90 ° and wherein the angle of the inner chamfer angle to the length direction of the riving knife body is 0-30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220994565.6U CN217647665U (en) | 2022-04-24 | 2022-04-24 | Automatic wedge welding chopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220994565.6U CN217647665U (en) | 2022-04-24 | 2022-04-24 | Automatic wedge welding chopper |
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| Publication Number | Publication Date |
|---|---|
| CN217647665U true CN217647665U (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220994565.6U Active CN217647665U (en) | 2022-04-24 | 2022-04-24 | Automatic wedge welding chopper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116000511A (en) * | 2022-12-26 | 2023-04-25 | 深圳市海志亿半导体工具有限公司 | Cutter head for enhancing fine-pitch wire feeding forming effect |
-
2022
- 2022-04-24 CN CN202220994565.6U patent/CN217647665U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116000511A (en) * | 2022-12-26 | 2023-04-25 | 深圳市海志亿半导体工具有限公司 | Cutter head for enhancing fine-pitch wire feeding forming effect |
| CN116000511B (en) * | 2022-12-26 | 2024-04-09 | 深圳市海志亿半导体工具有限公司 | Cutter head for enhancing fine-pitch wire feeding forming effect |
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