CN215008143U - Cleaver for wire bonding - Google Patents
Cleaver for wire bonding Download PDFInfo
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- CN215008143U CN215008143U CN202120805123.8U CN202120805123U CN215008143U CN 215008143 U CN215008143 U CN 215008143U CN 202120805123 U CN202120805123 U CN 202120805123U CN 215008143 U CN215008143 U CN 215008143U
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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 a chopper for lead bonding, include: the cutter comprises a cutter handle and a wedge-shaped cutter head, wherein the cutter handle is cylindrical, and one end of the cutter handle is fixedly connected with the wedge-shaped cutter head; the wedge-shaped cutter head comprises an end face, and the periphery of the end face is respectively connected with one end of the first chamfer plane, one end of the second chamfer plane, one end of the third chamfer plane and one end of the fourth chamfer plane; the end face comprises a front edge angle, a bonding face, a rear edge angle and an inclined plane which are connected in sequence; the inclined plane is provided with a lead hole, the first inclined plane is provided with a wire inlet hole, and the wire inlet hole is connected with the lead hole. The utility model discloses a improve the chopper structure, the threading is efficient, with low costs.
Description
Technical Field
The utility model belongs to the microelectronic device field, concretely relates to riving knife for lead bonding.
Background
The wire bonding technology is one of the key technologies in microelectronic packaging, and is characterized by simple process implementation, low cost, short packaging period and suitability for various packaging forms, so the wire bonding technology has a dominant position in the connection mode of microelectronic packaging. At present, more than 90% of chips in a semiconductor package adopt a wire bonding technology to realize electrical connection between a wafer internal circuit and a peripheral circuit, and complete power distribution and signal communication. Among them, wedge bonding is one of the commonly used wire bonding methods, and wedge cleaver is an important tool for wedge bonding, and its performance determines the quality, efficiency and economy of bonding. The existing wedge-shaped welding riving knife adopts a 90-degree lead hole structure, and the larger depth-diameter ratio not only increases the processing difficulty of the riving knife, but also increases the processing cost of the riving knife.
Disclosure of Invention
To the deficiencies of the prior art, the utility model provides a wedge chopper for lead bonding that wire threading is efficient, with low costs.
The utility model discloses a realize through following technical scheme.
A riving knife for wire bonding, the riving knife comprising: the cutter comprises a cutter handle (1) and a wedge-shaped cutter head (2), wherein the cutter handle (1) is cylindrical, and one end of the cutter handle (1) is fixedly connected with the wedge-shaped cutter head (2); the wedge-shaped cutter head (2) comprises an end face (25), and the periphery of the end face (25) is connected with one end of a first oblique cutting face (21), one end of a second oblique cutting face (22), one end of a third oblique cutting face (23) and one end of a fourth oblique cutting face (24) respectively; the end face (25) comprises a leading edge angle (251), a bonding face (252), a trailing edge angle (253) and an inclined plane (254) which are connected in sequence; the inclined plane (254) is provided with a lead hole (26), the first inclined plane (21) is provided with a wire inlet hole (27), and the wire inlet hole (27) is communicated with the lead hole (26).
Furthermore, the wall of the handle of the knife between the connecting part of the handle of the knife (1) and the third oblique section (23) and the other end of the handle of the knife (1) is a plane (11).
Further, the bonding surface (252) comprises a groove (2521), and the groove (2521) is a groove with an arc-shaped or V-shaped cross section.
Further, the groove (2521) is an arc-shaped groove with an arc-shaped section, the arc radius of the arc-shaped groove is 0.005-0.08mm, and the width of the arc-shaped groove is 0.01-0.10 mm; or the groove (2521) is a V-shaped groove with the section of 30-150 degrees and the width of 0.01-0.10 mm.
Further, the radius of the leading edge angle (251) is 1-50um, and the radius of the trailing edge angle (253) is 1-50 um.
Further, the lead hole (26) is a circular or square through hole.
Further, the wire inlet hole (27) is in a bell mouth shape or a conical through hole.
Further, the lead hole (26) is a circular through hole with a diameter of 0.03-0.15mm, or the lead hole (26) is a square through hole with a length of 0.1-0.15mm and a width of 0.03-0.06 mm; the included angle between the lead hole (26) and the knife handle 1 is 25-60 degrees; the included angle between the wire inlet hole (27) and the first chamfer plane (21) is 20-60 degrees; the included angle between the inclined surface (254) and the bonding surface (252) is 1-60 degrees.
Further, the diameter of the plane (11) is 1.1mm-1.5 mm.
Furthermore, the knife handle (1) and the wedge-shaped knife head (2) are of an integrated structure.
The utility model has the advantages that the utility model provides a wedge chopper for lead bonding, through improving its structure, the entrance hole is the horn mouth or toper, not only is favorable to the smooth entering of silk material or strip, but also reduces the crookedness of silk material or strip, avoids breaking, and the threading efficiency is high; the positioning error is avoided by the inclined plane, and the precision of the geometric dimension of the wedge-shaped cutter head is improved; the utility model discloses integration shaping, the processing cost is low.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a wedge-shaped tool tip;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a side view of the tool shank;
FIG. 5 is another schematic view of a wedge-shaped tool tip;
FIG. 6 is a side view of FIG. 5;
fig. 7 is a schematic diagram of a structure of a wire hole.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-7, a riving knife for wire bonding comprising: the tool comprises a tool handle 1 and a wedge-shaped tool bit 2;
the knife handle 1 is cylindrical, and one end of the knife handle 1 is fixedly connected with the wedge-shaped knife head 2 to form an integrated structure; the length of the knife handle is 10-30mm, and the diameter of the knife handle is 1.5-2.0 mm;
the wedge-shaped cutter head 2 comprises an end surface 25, and the periphery of the end surface 25 is fixedly connected with one end of a first chamfer plane 21, one end of a second chamfer plane 22, one end of a third chamfer plane 23 and one end of a fourth chamfer plane 24 respectively; the end face 25 comprises a leading edge angle 251, a bonding face 252, a trailing edge angle 253 and an inclined plane 254 which are connected in sequence;
the inclined plane 254 is provided with a lead hole 26, the first inclined plane 21 is provided with a lead hole 27, and the lead hole 27 is communicated with the lead hole 26 and penetrates through the inclined plane 254 and the first inclined plane 21; specifically, the lead hole 26 is a circular or square through hole, the circular through hole is used for wire bonding, and the square through hole is used for strip bonding; the lead hole 26 is a circular through hole with a diameter of 0.03-0.15mm, or the lead hole 26 is a square through hole with a length of 0.1-0.15mm and a width of 0.03-0.06 mm; the wire inlet hole 27 is a bell mouth shape or a conical through hole; the included angle between the lead hole 26 and the knife handle 1 is 25-60 degrees; the included angle between the wire inlet hole 27 and the first chamfer 21 is 20-60 degrees;
the wire enters from the wire inlet hole 27 and penetrates out to the bonding surface 252 through the wire leading hole 26, and the wire is not easy to break under the condition of high-speed wire feeding of an automatic bonding machine.
One end of the knife handle 1 is fixedly connected with the other ends of the first chamfer plane 21, the second chamfer plane 22, the third chamfer plane 23 and the fourth chamfer plane 24; the wall of the handle between the connecting part of the handle 1 and the third bevel surface 23 and the other end of the handle 1 is a plane 11, the plane 11 is rectangular, and the diameter of the plane 11 is 1.1mm-1.5 mm.
Further, the bevel 254 is rectangular in shape, the bevel 254 includes an angle of 1 ° -60 ° with the bonding surface 252, the radius of the leading corner 251 is 1-50um, and the radius of the trailing corner 253 is 1-50 um.
Further, the bonding surface 252 includes a groove 2521 extending through the entire bonding surface, the groove 2521 being a groove having an arc-shaped or V-shaped cross section; specifically, the groove 2521 is an arc-shaped groove with a cross section, an arc radius of the arc-shaped groove is 0.005-0.08mm, and a width of 0.01-0.10 mm; the groove 2521 is a groove with a V-shaped cross section, the included angle between the two side walls of the V-shaped groove is 30-150 degrees, and the width is 0.01-0.10 mm.
Example 1
A cleaver for wire bonding comprises a cylindrical cutter handle 1 and a wedge-shaped cutter head 2, wherein the length of the cleaver is 10mm, and the diameter of the cutter handle is 1.5 mm; the wedge-shaped cutter head 2 consists of a first chamfer plane 21, a second chamfer plane 22, a third chamfer plane 23, a fourth chamfer plane 24 and an end face 25, and included angles between the first chamfer plane 21, the second chamfer plane 22, the third chamfer plane 23 and the fourth chamfer plane 24 and the cutter handle 1 are all 1 degree; the end face 25 is composed of a leading edge corner 251, a bonding face 252, a trailing edge corner 253, and a bevel 254, the bonding face 252 includes a recess 2521 extending through the entire bonding face; the inclined plane 254 is provided with a lead hole 26, the first inclined plane 21 is provided with a wire inlet hole 27, the wire inlet hole 27 is connected with the lead hole 26, the lead hole 26 is a circular through hole and used for wire bonding, and the wire inlet hole 27 is a horn-mouth-shaped through hole; the wall of the handle between the connecting part of the handle 1 and the third bevel surface 23 and the other end of the handle 1 is a plane 11.
The radius of the leading edge angle 251 is 1um, and the radius of the trailing edge angle 253 is 1 um; the groove 2521 is an arc-shaped groove, the arc radius of the arc-shaped groove is 0.005mm, and the width of the arc-shaped groove is 0.01 mm; the diameter of the lead hole 26 is 0.03mm, and the included angle between the lead hole 26 and the knife handle 1 is 25 degrees; the included angle between the wire inlet hole 27 and the first chamfer 21 is 21 degrees; the included angle between the inclined surface 254 and the bonding surface 252 is 1 degree; the diameter of the flat surface 11 of the shank 1 is 1.1 mm.
Example 2
A cleaver for wire bonding comprises a cylindrical cutter handle 1 and a wedge-shaped cutter head 2, wherein the length of the cleaver is 19mm, and the diameter of the cutter handle is 1.583 mm; the wedge-shaped cutter head 2 consists of a first chamfer plane 21, a second chamfer plane 22, a third chamfer plane 23, a fourth chamfer plane 24 and an end face 25, and included angles between the first chamfer plane 21, the second chamfer plane 22, the third chamfer plane 23 and the fourth chamfer plane 24 and the cutter handle 1 are all 15 degrees; the end face 25 is composed of a leading edge corner 251, a bonding face 252, a trailing edge corner 253, and a bevel 254, the bonding face 252 includes a recess 2521 extending through the entire bonding face; the inclined plane 254 is provided with a lead hole 26, the first inclined plane 21 is provided with a wire inlet hole 27, the wire inlet hole 27 is connected with the lead hole 26, and the lead hole 26 is a circular through hole and is used for wire bonding; the wire inlet hole 27 is a through hole in the shape of a bell mouth; the wall of the handle between the connecting part of the handle 1 and the third bevel surface 23 and the other end of the handle 1 is a plane 11.
The radius of leading edge angle 251 is 25um, and the radius of trailing edge angle 253 is 15 um; the groove 2521 is a V-shaped groove, the included angle of the V-shaped groove is 50 degrees, and the width is 0.05 mm; the diameter of the lead hole 26 is 0.05mm, and the included angle between the lead hole 26 and the knife handle 1 is 45 degrees; the included angle between the wire inlet hole 27 and the first chamfer 21 is 25 degrees; the included angle between the inclined surface 254 and the bonding surface 252 is 30 degrees; the diameter of the flat surface 11 of the shank 1 is 1.5 mm.
Example 3
A cleaver for wire bonding comprises a cylindrical cutter handle 1 and a wedge-shaped cutter head 2, wherein the length of the cleaver is 10mm, and the diameter of the cutter handle is 1.5 mm; the wedge-shaped cutter head 2 consists of a first chamfer plane 21, a second chamfer plane 22, a third chamfer plane 23, a fourth chamfer plane 24 and an end face 25, and included angles between the first chamfer plane 21, the second chamfer plane 22, the third chamfer plane 23 and the fourth chamfer plane 24 and the cutter handle 1 are all 1 degree; the end face 25 is composed of a leading edge corner 251, a bonding face 252, a trailing edge corner 253, and a bevel 254, the bonding face 252 includes a recess 2521 extending through the entire bonding face; the inclined plane 254 is provided with a lead hole 26, the first inclined plane 21 is provided with a lead hole 27, the lead hole 27 is connected with the lead hole 26, and the lead hole 26 is a square through hole and is used for strip bonding; the wall of the handle between the connecting part of the handle 1 and the third bevel surface 23 and the other end of the handle 1 is a plane 11.
The radius of leading edge angle 251 is 50um, and the radius of trailing edge angle 253 is 50 um; the groove 2521 is an arc-shaped groove, the arc radius of the arc-shaped groove is 0.08mm, and the width of the arc-shaped groove is 0.1 mm; the lead hole 26 is 0.1mm in length, 0.03mm in width and 60 degrees in included angle with the tool holder 1, and the lead hole 27 is 60 degrees in included angle with the first chamfer plane 21; the included angle between the inclined surface 254 and the bonding surface 252 is 60 degrees; the diameter of the flat surface 11 of the shank 1 is 1.3 mm.
Example 4
A cleaver for wire bonding comprises a cylindrical cutter handle 1 and a wedge-shaped cutter head 2, wherein the length of the cleaver is 19mm, and the diameter of the cutter handle is 1.583 mm; the wedge-shaped cutter head 2 consists of a first chamfer plane 21, a second chamfer plane 22, a third chamfer plane 23, a fourth chamfer plane 24 and an end surface 25; the included angles between the first chamfer plane 21, the second chamfer plane 22, the third chamfer plane 23 and the fourth chamfer plane 24 and the knife handle 1 are all 15 degrees; the end face 25 is composed of a leading edge corner 251, a bonding face 252, a trailing edge corner 253, and a bevel 254, the bonding face 252 includes a recess 2521 extending through the entire bonding face; the inclined plane 254 is provided with a lead hole 26, the first inclined plane 21 is provided with a lead hole 27, the lead hole 27 is connected with the lead hole 26, and the lead hole 26 is a square through hole and is used for strip bonding; the wall of the handle between the connecting part of the handle 1 and the third bevel surface 23 and the other end of the handle 1 is a plane 11.
The radius of leading edge angle 251 is 25um, and the radius of trailing edge angle 253 is 25 um; the groove 2521 is a V-shaped groove, the included angle of the V-shaped groove is 140 degrees, and the width is 0.1 mm; the lead hole 26 is 0.15mm in length, 0.06mm in width and 45 degrees in included angle with the tool shank 1, the lead hole 27 is 45 degrees in included angle with the chamfer 21, and the inclined surface 254 is 30 degrees in included angle with the bonding surface 252; the diameter of the flat surface 11 of the shank 1 is 1.5 mm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other modifications and equivalents may be made by those skilled in the art in light of the teachings of the present disclosure to achieve the same purpose, and should be construed as within the scope of the present disclosure.
Claims (10)
1. A riving knife for wire bonding, the riving knife comprising: the cutter comprises a cutter handle (1) and a wedge-shaped cutter head (2), wherein the cutter handle (1) is cylindrical, and one end of the cutter handle (1) is fixedly connected with the wedge-shaped cutter head (2); the wedge-shaped cutter head (2) comprises an end face (25), and the periphery of the end face (25) is connected with one end of a first oblique cutting face (21), one end of a second oblique cutting face (22), one end of a third oblique cutting face (23) and one end of a fourth oblique cutting face (24) respectively; the end face (25) comprises a leading edge angle (251), a bonding face (252), a trailing edge angle (253) and an inclined plane (254) which are connected in sequence; the inclined plane (254) is provided with a lead hole (26), the first inclined plane (21) is provided with a wire inlet hole (27), and the wire inlet hole (27) is communicated with the lead hole (26).
2. The cleaver of claim 1, wherein the wall of the shank between the connection of the shank (1) to the third chamfer (23) and the other end of the shank (1) is a flat surface (11).
3. The riving knife of claim 1 wherein the bonding surface (252) includes a groove (2521), the groove (2521) being a radiused or V-shaped groove in cross-section.
4. The riving knife of claim 3 wherein the notch (2521) is a circular arc shaped notch having a circular arc radius of 0.005-0.08mm and a width of 0.01-0.10 mm; or the groove (2521) is a V-shaped groove with the section of 30-150 degrees and the width of 0.01-0.10 mm.
5. The riving knife of claim 1 wherein the radius of the leading edge angle (251) is 1-50um and the radius of the trailing edge angle (253) is 1-50 um.
6. The riving knife of claim 1 wherein the lead hole (26) is a circular or square through hole.
7. The riving knife of claim 1 wherein the wire entry hole (27) is flared or a tapered through hole.
8. The cleaver of claim 6, wherein the wire hole (26) is a circular through hole having a diameter of 0.03-0.15mm, or the wire hole (26) is a square through hole having a length of 0.1-0.15mm and a width of 0.03-0.06 mm; the included angle between the lead hole (26) and the knife handle (1) is 25-60 degrees; the included angle between the wire inlet hole (27) and the first chamfer plane (21) is 20-60 degrees; the included angle between the inclined surface (254) and the bonding surface (252) is 1-60 degrees.
9. The riving knife of claim 2 wherein the flat surface (11) is 1.1mm to 1.5mm in diameter.
10. The riving knife of claim 1 wherein the handle (1) and the wedge shaped bit (2) are of a unitary construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120805123.8U CN215008143U (en) | 2021-04-20 | 2021-04-20 | Cleaver for wire bonding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120805123.8U CN215008143U (en) | 2021-04-20 | 2021-04-20 | Cleaver for wire bonding |
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| Publication Number | Publication Date |
|---|---|
| CN215008143U true CN215008143U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120805123.8U Active CN215008143U (en) | 2021-04-20 | 2021-04-20 | Cleaver for wire bonding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799472A (en) * | 2022-03-16 | 2022-07-29 | 东莞市乾丰电子科技有限公司 | Wedge-shaped cleaver and aluminum wire bonding method |
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2021
- 2021-04-20 CN CN202120805123.8U patent/CN215008143U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799472A (en) * | 2022-03-16 | 2022-07-29 | 东莞市乾丰电子科技有限公司 | Wedge-shaped cleaver and aluminum wire bonding method |
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Address after: 100035 No. 2, xinwai street, Xicheng District, Beijing Patentee after: China Youyan Technology Group Co.,Ltd. Patentee after: YOUYAN ENGINEERING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Address before: 100035 No. 2, xinwai street, Xicheng District, Beijing Patentee before: Youyan Technology Group Co.,Ltd. Patentee before: YOUYAN ENGINEERING TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |