CN114799750A - Wedge-shaped riving knife suitable for full-automatic bonding and machining method thereof - Google Patents
Wedge-shaped riving knife suitable for full-automatic bonding and machining method thereof Download PDFInfo
- Publication number
- CN114799750A CN114799750A CN202210435492.1A CN202210435492A CN114799750A CN 114799750 A CN114799750 A CN 114799750A CN 202210435492 A CN202210435492 A CN 202210435492A CN 114799750 A CN114799750 A CN 114799750A
- Authority
- CN
- China
- Prior art keywords
- wedge
- groove
- shaped
- face
- lead hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003754 machining Methods 0.000 title claims description 6
- 238000000034 method Methods 0.000 title abstract description 6
- 238000003466 welding Methods 0.000 claims abstract description 20
- 238000003672 processing method Methods 0.000 claims abstract description 8
- 235000014820 Galium aparine Nutrition 0.000 claims abstract description 7
- 240000005702 Galium aparine Species 0.000 claims abstract description 7
- 239000000956 alloy Substances 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052721 tungsten Inorganic materials 0.000 claims description 12
- 239000010937 tungsten Substances 0.000 claims description 12
- 238000001746 injection moulding Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 229920005596 polymer binder Polymers 0.000 claims description 8
- 239000002491 polymer binding agent Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 238000010892 electric spark Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims 4
- 238000005245 sintering Methods 0.000 claims 1
- 238000004377 microelectronic Methods 0.000 abstract description 2
- 210000001624 hip Anatomy 0.000 description 2
- 238000004898 kneading Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/74—Apparatus for manufacturing arrangements for connecting or disconnecting semiconductor or solid-state bodies
- H01L24/78—Apparatus for connecting with wire connectors
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Wire Bonding (AREA)
Abstract
The invention discloses a wedge-shaped cleaver applicable to full-automatic bonding and a processing method thereof, belonging to the field of microelectronic devices. The wedge-shaped riving knife is of an integral structure and consists of a knife handle and a knife head, wherein the knife handle is cylindrical, and a first through lead hole is formed in the center of the knife handle; the tool bit is in a wedge-shaped structure, the tool tip part of the tool bit is in a high-low step structure, the end face of a high step is a welding end face, and the periphery of the tool bit is respectively connected with one end of each of the four inclined planes; the welding end face consists of a front edge angle, a bonding face, a rear edge angle, a groove and an inclined plane, a second lead hole extending to the groove is formed in the first inclined plane, and the second lead hole is conical. The second lead hole is designed to be of a conical structure, the inlet of the second lead hole is a surface with a larger diameter, wire threading is facilitated, the outlet of the second lead hole is a surface with a smaller diameter, the second lead hole has large constraint on the welding wire, and the wire swinging problem of the welding wire in the wire feeding process is avoided.
Description
Technical Field
The invention belongs to the field of microelectronic devices, and particularly relates to a wedge-shaped riving knife suitable for full-automatic bonding and a processing method thereof.
Background
The wedge-shaped cleaver is an important tool for wire bonding, and a welding wire is led out through the second wire hole and enters the bonding surface to be bonded. The second lead hole of the wedge-shaped riving knife adopted in the market at present has smaller restriction on the wire outlet angle of the welding wire, and the wire swinging problem can occur in the wire feeding process, and the wire swinging problem can cause unqualified bonding welding points in the full-automatic bonding process.
Disclosure of Invention
The invention aims to provide a wedge-shaped riving knife suitable for full-automatic bonding and a processing method thereof. The wedge-shaped riving knife comprises a knife handle 1 and a knife head 2, and is characterized in that the wedge-shaped riving knife suitable for full-automatic bonding is of an integral structure, wherein the knife handle 1 is cylindrical, and the center of the knife handle is provided with a through first lead hole 11; the tool bit 2 is of a wedge-shaped structure, the tool tip part of the tool bit is of a high-low step structure, the end face of the high step is a welding end face 21, and the periphery of the welding end face 21 is connected with one end of a first chamfer face 22, one end of a second chamfer face 23, one end of a third chamfer face 24 and one end of a fourth chamfer face 25 respectively; the welding end face 21 consists of a front edge corner 211, a bonding face 212, a rear edge corner 213, a groove 214 and an inclined plane 215; the second lead hole 26 extending to the groove 214 is provided on the first chamfer 22 at the low step portion.
The second lead hole 26 is conical, the taper is 1-20 degrees, and the diameter of the small circle is 0.02-0.09 mm.
The bonding surface 212 comprises a groove 2121, the cross section of the groove 2121 is arc or trapezoid, when the groove 2121 is an arc groove, the arc radius is 0.01-0.04mm, and the width is 0.01-0.07 mm; when the groove 2121 is a trapezoidal groove, the included angle between the two sides of the trapezoidal groove is 1-120 degrees, and the length of the lower bottom is 0.01-0.08 mm.
A processing method of a wedge-shaped riving knife suitable for full-automatic bonding comprises the following steps:
1) weighing tungsten carbide-high-entropy alloy powder and a polymer binder according to the weight ratio, sequentially putting the tungsten carbide-high-entropy alloy powder and the polymer binder into a vacuum kneader, vacuumizing, heating to 130-150 ℃, stirring and mixing for 2-4h, stirring and cooling to 60 ℃ of a storage bin after the feeding and mixing are finished, stopping stirring, and continuously cooling to room temperature to obtain granular feed;
2) placing the tungsten carbide-high entropy alloy feed into an injection molding machine, heating to 130-150 ℃, and directly molding a wedge-shaped chopper blank by adopting an injection molding mode;
3) placing the wedge-shaped riving knife blank in the step 2) in a furnace to sinter at the temperature of 1200-2000 ℃ to prepare the wedge-shaped riving knife;
4) and 3) machining a groove 2121 and a second lead hole 26 by using the wedge-shaped riving knife in the step 3) by using high-precision electric spark equipment.
The invention has the advantages that the second lead hole is designed into a conical structure, the inlet is a surface with a larger diameter, wire threading is facilitated, the outlet is a surface with a smaller diameter, the constraint on the welding wire is large, the wire swinging problem of the welding wire in the wire feeding process is avoided, and the invention is suitable for full-automatic bonding welding operation.
Drawings
FIG. 1 is a schematic view of the overall structure of a wedge-shaped riving knife;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic view of a wedge-shaped riving knife head;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a cross-sectional view of a wedge-shaped riving knife head (the groove cross-section is a circular arc);
FIG. 6 is a cross-sectional view of a wedge-shaped riving knife head (groove cross-section is trapezoidal);
FIG. 7 is a schematic view of a wedge chopper blank directly formed by an injection molding process;
fig. 8 is an enlarged view of fig. 7 at a.
Description of the reference numerals:
1-shank, 11-first lead hole, 12-plane, 2-tool bit, 21-welding end face, 22-first side face, 23-second side face, 24-third side face, 25-fourth side face, 26-second lead hole, 211-leading edge angle, 212-bonding face, 213-trailing edge angle, 214-groove, 2121-groove
Detailed Description
The invention provides a wedge-shaped cleaver suitable for full-automatic bonding and a processing method thereof. The present invention will be described in detail below with reference to the accompanying drawings and examples.
The overall structure of the wedge-shaped riving knife is shown in figure 1 and figure 2. The wedge-shaped riving knife suitable for full-automatic bonding is of an integral structure and comprises a knife handle 1 and a knife head 2, wherein the knife handle 1 is cylindrical, and a first through lead hole 11 is formed in the center of the knife handle; the tool bit 2 is of a wedge-shaped structure, the end face of the tool bit 2 is a welding end face 21, and the periphery of the welding end face 21 is connected with one end of a first chamfer face 22, one end of a second chamfer face 23, one end of a third chamfer face 24 and one end of a fourth chamfer face 25 respectively; the welding end face 21 is composed of a front edge corner 211, a bonding face 212, a rear edge corner 213, a groove 214 and a bevel 215 (as shown in fig. 3, 4 and 5), the first chamfer face 22 is provided with a second lead hole 26 extending to the groove 214, the second lead hole 26 is conical, the taper is 1-20 degrees, and the diameter of the small circle is 0.02-0.09 mm.
The bonding surface 212 comprises a groove 2121, the cross section of the groove 2121 is arc or trapezoid (as shown in fig. 6, 7 and 8), and when the groove 2121 is an arc-shaped groove, the arc radius is 0.01-0.04mm, and the width is 0.01-0.07 mm; when the groove 2121 is a trapezoidal groove, the included angle between the two sides of the trapezoidal groove is 1-120 degrees, and the length of the lower bottom is 0.01-0.08 mm.
A processing method of a wedge-shaped riving knife suitable for full-automatic bonding comprises the following steps:
1) weighing tungsten carbide-high-entropy alloy powder and a polymer binder according to the weight ratio, sequentially putting the tungsten carbide-high-entropy alloy powder and the polymer binder into a vacuum kneader, vacuumizing, heating to 130-150 ℃, stirring and mixing for 2-4h, stirring and cooling to 60 ℃ of a storage bin after the feeding and mixing are finished, stopping stirring, and continuously cooling to room temperature to obtain granular feed;
2) placing the tungsten carbide-high entropy alloy feed into an injection molding machine, heating to 130-150 ℃, and directly molding a wedge-shaped chopper blank by adopting an injection molding mode;
3) placing the wedge-shaped riving knife blank in the step 2) in a furnace to sinter at the temperature of 1200-2000 ℃ to prepare the wedge-shaped riving knife;
4) and 3) machining a groove 2121 and a second lead hole 26 by using the wedge-shaped riving knife in the step 3) by using high-precision electric spark equipment.
Example 1
In the wedge-shaped riving knife structure suitable for full-automatic bonding shown in fig. 1-5, the first chamfer 22 is provided with a second lead hole 26 extending to the groove 214, the second lead hole 26 is conical, the taper is 1 °, the diameter of the small circle is 0.02mm, the cross section of the groove 2121 is a circular arc, the radius of the circular arc is 0.01mm, and the width is 0.01 mm.
Example 2
In the wedge-shaped riving knife structure suitable for full-automatic bonding shown in fig. 1-5, the first chamfer plane 22 is provided with a second lead hole 26 extending to the groove 214, the second lead hole 26 is conical, the taper is 10 °, the diameter of the small circle is 0.05mm, the cross section of the groove 2121 is trapezoidal, the included angle between the two waists of the trapezoidal groove is 1 °, and the length of the lower bottom is 0.01 mm.
Example 3
In the wedge-shaped riving knife structure suitable for full-automatic bonding shown in fig. 1-5, the first chamfer plane 22 is provided with a second lead hole 26 extending to the groove 214, the second lead hole 26 is conical, the taper is 20 °, the diameter of the small circle is 0.09mm, the cross section of the groove 2121 is trapezoidal, the included angle between the two waists of the trapezoidal groove is 120 °, and the length of the lower bottom is 0.08 mm.
Example 4
A processing method of a wedge-shaped riving knife suitable for full-automatic bonding comprises the following steps:
1) respectively weighing tungsten carbide-high-entropy alloy powder and a polymer binder according to the weight ratio, sequentially putting the tungsten carbide-high-entropy alloy powder and the polymer binder into a vacuum kneading machine, vacuumizing, heating to 140 ℃, stirring and mixing for 3 hours, stopping stirring when the feeding and mixing are finished and the stirring and cooling are carried out until the temperature of a storage bin is 60 ℃, and continuously cooling to room temperature to obtain granular feeding;
2) placing the tungsten carbide-high entropy alloy feed into an injection molding machine, heating to 145 ℃, and directly molding a wedge-shaped chopper blank by adopting an injection molding mode;
3) placing the wedge-shaped riving knife blank in the step 2) in a furnace to sinter at the temperature of 1800 ℃ to obtain a wedge-shaped riving knife;
4) and 3) machining a groove 2121 and a second lead hole 26 by using the wedge-shaped riving knife in the step 3) by using high-precision electric spark equipment.
Claims (4)
1. The wedge-shaped riving knife suitable for full-automatic bonding comprises a knife handle (1) and a knife head (2); the wedge-shaped riving knife is characterized in that the wedge-shaped riving knife is of an integral structure, the knife handle (1) is cylindrical, and a first through lead hole (11) is formed in the center of the knife handle; the tool bit (2) is of a wedge-shaped structure, the tool tip part of the tool bit is of a high-low step structure, the end face of a high step is a welding end face (21), and the periphery of the welding end face (21) is connected with one end of a first oblique cutting face (22), one end of a second oblique cutting face (23), one end of a third oblique cutting face (24) and one end of a fourth oblique cutting face (25) respectively; the welding end face (21) consists of a front edge angle (211), a bonding face (212), a rear edge angle (213), a groove (214) and an inclined plane (215); a second lead hole (26) extending to the groove (214) is formed in the first chamfer (22) at the low step portion.
2. The wedge cleaver suitable for full automatic bonding of claim 1, wherein the second feed-through hole (26) is tapered with a taper of 1 ° to 20 ° and a small circular diameter of 0.02mm to 0.09 mm.
3. The wedge chopper suitable for full automatic bonding of claim 1, wherein the bonding surface (212) comprises a groove (2121), the cross section of the groove (2121) is arc or trapezoid, and when the groove (2121) is an arc-shaped groove, the arc radius is 0.01-0.04mm, and the width is 0.01-0.07 mm; when the groove (2121) is a trapezoidal groove, the included angle between the two sides of the trapezoidal groove is 1-120 degrees, and the length of the lower bottom is 0.01-0.08 mm.
4. A processing method of a wedge-shaped riving knife suitable for full-automatic bonding is characterized by comprising the following steps:
1) weighing tungsten carbide-high-entropy alloy powder and a polymer binder according to the weight ratio, sequentially putting the tungsten carbide-high-entropy alloy powder and the polymer binder into a vacuum kneader, vacuumizing, heating to 130-150 ℃, stirring and mixing for 2-4h, stirring and cooling to 60 ℃ of a storage bin after the feeding and mixing are finished, stopping stirring, and continuously cooling to room temperature to obtain granular feed;
2) placing the tungsten carbide-high entropy alloy feed into an injection molding machine, heating to 130-150 ℃, and directly molding a wedge-shaped chopper blank by adopting an injection molding mode;
3) placing the wedge-shaped cleaver blank obtained in the step 2) in a furnace, and sintering at 1200-2000 ℃ to obtain a wedge-shaped cleaver;
4) and (3) machining a groove (2121) and a second lead hole (26) by using the wedge-shaped cleaver obtained in the step 3) through high-precision electric spark equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210435492.1A CN114799750A (en) | 2022-04-24 | 2022-04-24 | Wedge-shaped riving knife suitable for full-automatic bonding and machining method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210435492.1A CN114799750A (en) | 2022-04-24 | 2022-04-24 | Wedge-shaped riving knife suitable for full-automatic bonding and machining method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114799750A true CN114799750A (en) | 2022-07-29 |
Family
ID=82506662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210435492.1A Pending CN114799750A (en) | 2022-04-24 | 2022-04-24 | Wedge-shaped riving knife suitable for full-automatic bonding and machining method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114799750A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117817209A (en) * | 2024-02-19 | 2024-04-05 | 深圳市摆渡微电子有限公司 | Adjustable welding chopper for chip welding |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040206203A1 (en) * | 2002-12-02 | 2004-10-21 | Seco Tools Ab | Method of making tungsten carbide based hard metal tools or components |
| CN110385440A (en) * | 2019-07-29 | 2019-10-29 | 成都精蓉创科技有限公司 | The production technology of powder metallurgy depth chamber weldering chopper |
| CN112775628A (en) * | 2020-12-30 | 2021-05-11 | 有研科技集团有限公司 | Wedge-shaped riving knife for wire bonding and processing method thereof |
| CN113284814A (en) * | 2021-04-20 | 2021-08-20 | 有研科技集团有限公司 | Deep cavity welding wedge-shaped cleaver and production method thereof |
| CN114262211A (en) * | 2021-12-27 | 2022-04-01 | 深圳市盛元半导体有限公司 | Riving knife for aluminum wire bonding and production process thereof |
| CN114799595A (en) * | 2022-04-13 | 2022-07-29 | 有研工程技术研究院有限公司 | Deep cavity welding wedge-shaped cleaver and machining method thereof |
-
2022
- 2022-04-24 CN CN202210435492.1A patent/CN114799750A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040206203A1 (en) * | 2002-12-02 | 2004-10-21 | Seco Tools Ab | Method of making tungsten carbide based hard metal tools or components |
| CN110385440A (en) * | 2019-07-29 | 2019-10-29 | 成都精蓉创科技有限公司 | The production technology of powder metallurgy depth chamber weldering chopper |
| CN112775628A (en) * | 2020-12-30 | 2021-05-11 | 有研科技集团有限公司 | Wedge-shaped riving knife for wire bonding and processing method thereof |
| CN113284814A (en) * | 2021-04-20 | 2021-08-20 | 有研科技集团有限公司 | Deep cavity welding wedge-shaped cleaver and production method thereof |
| CN114262211A (en) * | 2021-12-27 | 2022-04-01 | 深圳市盛元半导体有限公司 | Riving knife for aluminum wire bonding and production process thereof |
| CN114799595A (en) * | 2022-04-13 | 2022-07-29 | 有研工程技术研究院有限公司 | Deep cavity welding wedge-shaped cleaver and machining method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117817209A (en) * | 2024-02-19 | 2024-04-05 | 深圳市摆渡微电子有限公司 | Adjustable welding chopper for chip welding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114799750A (en) | Wedge-shaped riving knife suitable for full-automatic bonding and machining method thereof | |
| CN110193705B (en) | Milling process of LD5-CS free forging closed-angle deep-cavity structural part | |
| CN114799595A (en) | Deep cavity welding wedge-shaped cleaver and machining method thereof | |
| CN101905344A (en) | Deep narrow groove processing method of nickel-based high-temperature alloy | |
| CN113284814A (en) | Deep cavity welding wedge-shaped cleaver and production method thereof | |
| CN116604036A (en) | 3D printing method for tungsten and tungsten alloy grating | |
| CN110961743A (en) | Technology for processing deep cavity welding cleaver and tool point thereof | |
| CN201067929Y (en) | Hard alloy round saw blade for timber | |
| CN208450680U (en) | Milling cutter for processing graphite workpiece | |
| CN116618726A (en) | PCD end mill machining process | |
| CN214720891U (en) | Milling cutter structure | |
| CN114378345B (en) | Large-chamfer forming surface machining forming milling cutter | |
| CN108526618A (en) | A kind of thread machining tool of nonstandard outer-hexagonal bolt | |
| CN114505905A (en) | Ultrasonic wave cut-off knife and 3D printing preparation method and repairing method thereof | |
| CN209565495U (en) | Slot knife blade, slot knife and numerically controlled lathe | |
| CN218855864U (en) | Deep cavity welding wedge-shaped cleaver with groove type tool bit end face | |
| CN201151166Y (en) | Novel diamond bit | |
| CN208450681U (en) | Milling cutter for processing graphite workpiece | |
| CN112974943A (en) | Head exchange type rotary cutter | |
| CN216828822U (en) | Double-output side milling cutter for numerical control machine tool | |
| CN206622681U (en) | A kind of automatic double edge milling machines | |
| CN218926354U (en) | Finish milling long side cutter structure | |
| CN117961145A (en) | PCD spiral blade milling cutter and processing technology thereof | |
| CN110052784A (en) | A kind of processing method of fuel element abnormal shape components | |
| CN211614343U (en) | Turning tool for machining threaded hole in hard alloy soft blank stage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220729 |
|
| RJ01 | Rejection of invention patent application after publication |