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A kind of manufacturing method of gold-tin alloy wire rod

A manufacturing method and tin alloy technology, applied in the field of alloy wire manufacturing, can solve the problems of inability to perform micro-machining, inability to meet graphics, alloy brittleness, etc., and achieve the effects of low processing difficulty, quality assurance, and high production efficiency

Active Publication Date: 2019-04-26
光洋新材料科技(昆山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thinnest thickness of the preformed sheet used is 25 μm, and the obtained alloy is too brittle to be micro-machined, let alone meet the requirements of complex graphics, precise positioning and wafer-level bumps

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] ①Put 80% gold ingot and 20% tin ingot into the graphite crucible, pour it into the graphite casting mold after melting, then pour it out to cool, and cut it into a pre-alloy with a length ≤ 3cm;

[0022] ②Step ① Feed the obtained pre-alloy into the continuous casting machine, set the temperature at 500°C, and wait until it is completely melted;

[0023] ③When the cooling temperature reaches 130°C, pass nitrogen protection and pull out the bus bar;

[0024] ④ Pull out the bus bar from the crystallizer with a diameter of 1mm to become a wire;

[0025] ⑤ Wipe the washed sample with alcohol cotton, and cut it into a gold-tin wire with a certain length.

Embodiment 2

[0027] ①Put 75% gold ingot and 25% tin ingot into the graphite crucible, pour it into the graphite casting mold after melting, then pour it out to cool, and cut it into a pre-alloy with a length ≤ 3cm;

[0028] ②Step ① Feed the obtained pre-alloy into the continuous casting machine, set the temperature at 350°C, and wait until it is completely melted;

[0029] ③When the cooling temperature reaches 150°C, pass nitrogen protection and pull out the bus bar;

[0030] ④ Pull out the bus bar from the crystallizer with a diameter of 2mm to become a wire;

[0031] ⑤ Wipe the washed sample with alcohol cotton, and cut it into a gold-tin wire with a certain length.

Embodiment 3

[0033] ①Put 72% gold ingot and 28% tin ingot into the graphite crucible, pour it into the graphite casting mold after melting, then pour it out to cool, and cut it into a pre-alloy with a length ≤ 3cm;

[0034] ②Step ① Feed the obtained pre-alloy into the continuous casting machine, set the temperature at 450°C, and wait until it is completely melted;

[0035] ③When the cooling temperature reaches 140°C, pass nitrogen protection and pull out the bus bar;

[0036] ④ Pull out the busbar from the crystallizer with a diameter of 3mm to become a wire;

[0037] ⑤ Wipe the washed sample with alcohol cotton, and cut it into a gold-tin wire with a certain length.

[0038] The gold-tin alloy wire is manufactured by the above method, which has low processing difficulty and high production efficiency. The composition of gold-tin alloy after pre-alloying is relatively uniform, so that the quality of the wire formed by continuous casting is also relatively stable and will not break easily...

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Abstract

The invention belongs to the field of alloy wire manufacturing, and in particular, relates to a manufacturing method of a gold tin alloy wire. The manufacturing method comprises the following steps: gold and tin are prealloyed for ingot casting according to a demanded mass ratio; the prealloy is fed in continuous casting equipment for melting; a gold tin wire busbar is pulled out from the continuous casting equipment; the busbar is drawn to reach a demanded diameter by a crystallizer; and a sample washed by water is wiped by an alcohol cotton, and is shorn to form the gold tin wire. The manufacturing method can perform large-batch production of gold tin alloy wires, and is high in production efficiency and low in machining difficulty; and the obtained product is uniform in composition and not liable to break to guarantee the quality.

Description

technical field [0001] The utility model belongs to the field of alloy wire manufacture, and in particular relates to a method for making gold-tin alloy wire easier to manufacture. Background technique [0002] The AuSn20 material in low-temperature gold alloys is aimed at the high thermal conductivity of high-power optoelectronic devices. These characteristics make low-temperature gold alloys widely used in high-power LEDs, electric vehicles and lasers and other microelectronics fields, as well as strategic fields of optical communications and optoelectronic devices. application. Gold alloy materials such as AuSn, AuGe, AuZn, AuGeNi, etc., may be used in the fields of microelectronics, optoelectronics, semiconductor light-emitting and MEMS, and have broad application prospects. High-power LEDs and high-power lasers based on electroluminescence, as well as Intel optical brain technology based on optical communication principles, all require changes in optoelectronic packagi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/02C22C1/02
CPCC22C1/02C22C5/02
Inventor 黃軍浩顧晨
Owner 光洋新材料科技(昆山)有限公司