Silver-lanthanum-calcium alloy bonding wire and manufacturing method thereof

A calcium alloy, bonding wire technology, applied in semiconductor/solid-state device manufacturing, circuits, electric solid-state devices, etc., can solve the problems of drawing disconnection, poor high temperature stability, easy oxidation of aluminum wire surface, etc., and achieve stable and reliable performance. , the effect of low price

Inactive Publication Date: 2014-08-20
江西蓝微电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a silver-lanthanum-calcium alloy bonding wire with high-purity silver as the main material and its manufacturing method, which overcomes the existing alloy-type bonding copper wire, the surface of the aluminum wire is easily oxidized, the high temperature stability is poor and the drawing breaks. Wire problems, and the defects and deficiencies of high production costs of gold-based bonding wires, low hardness of the electroplating layer and no resistance to friction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This invention is implemented like this. A silver cricket calcium alloy alloy key with high chide silver as the main material, and the material that forms the key wire consists of the following weight percentage: gold (AU) accounts for 0.5%, calcium (CA) (CA)It accounts for 0.5%, a (LA) accounts for 2%, and silver (AG) accounts for 97%; the purity of gold is greater than 99.99%, the purity of calcium is greater than 99.999%, the purity of 镧 is greater than 99.5%, and the purity of silver is greater than 99.99999%.

[0019] The production process steps and methods of silver calcium calcium alloy key filaments are as follows:

[0020] ① Extract high silver: immerse the No. 1 silver (IC-AG99.99) as an anode into the electrolyte, and use high sterling silver foil as the cathode into the electrolyte; enter the direct current of 7V and 2.5A between the anode and cathode to supplement fresh electrolytic reliefThe temperature of the electrolyte does not exceed 60 ° C, and the purit...

Embodiment 2

[0031] A silver cricket calcium alloy key with high -church silver as the main material, and the material that forms the key wire consists of the following raw materials with a percentage of weight: gold (AU) accounts for 1%, calcium (CA) accounts for 1%, 镧 (LA (LA) (la) (LA (la) (LA (la) (LA (LA) (la)) It accounts for 3%, silver (AG) accounts for 95%; the purity of gold is greater than 99.99%, the purity of calcium is greater than 99.999%, the purity of the 镧 is greater than 99.5%, and the purity of the silver is greater than 99.99999%.

[0032] The production process steps and methods of silver calcium calcium alloy key filaments are as follows:

[0033] ① Extract high sterling silver: immerse the No. 1 silver (IC-AG99.99) as an anode into the electrolyte, and use high sterling silver foil as the cathode into the electrolyte; enter the direct current of 9V and 3.5A between the anode and cathode to supplement fresh electrolytic reliefThe temperature of the electrolyte does not ex...

Embodiment 3

[0044] A silver cricket calcium alloy key with high -purity silver as the main material, and the material that forms the key wire consists of the following raw materials with a percentage of weight: gold (AU) accounts for 0.8%, calcium (CA) accounts for 0.7%, and 镧 (LA (LA (LA)) 2.6%, silver (AG) accounts for 95.9%.The purity of gold is greater than 99.99%, the purity of calcium is greater than 99.999%, the purity of the 镧 is greater than 99.5%, and the purity of the silver is greater than 99.9999%.

[0045] The production process steps and methods of silver calcium calcium alloy key filaments are as follows:

[0046] ① Extract high silver: immerse the No. 1 silver (IC-AG99.99) as an anode into the electrolyte, and use high sterling silver foil as the cathode into the electrolyte; enter the direct current of 8V and 3.0A between the anode and cathode to supplement fresh electrolytic reliefThe temperature of the electrolyte does not exceed 60 ° C, and the purity of a certain weight ...

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PUM

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Abstract

The invention discloses a silver-lanthanum-calcium alloy bonding wire and a manufacturing method thereof. According to the bonding wire, high sterling silver is used as a main part material, and a lanthanum metal material, a calcium metal material and a gold metal material are included. The bonding wire comprises, by weight, 95-97% of silver, 2-3% of lanthanum, 0.5-1% of calcium and 0.5-1% of gold. The manufacturing method includes the steps that the high sterling silver with the purity being larger than 99.9999% is extracted to be prepared into silver alloy ingots and then to be prepared into cast condition silver-lanthanum-calcium alloy busbars, the alloy busbars are pulled to be wires of about 1 mm, heat treatment is completed, and then precision drawing, heat treatment and washing are conducted so that silver-lanthanum-calcium alloy bonding wires of different specifications can be manufactured.

Description

Technical field [0001] The present invention involves a metal bonding wire and its manufacturing method, and especially the silver calcium calcium alloy bonds and its manufacturing methods made of alloy materials such as silver cricket calcium. Background technique [0002] At present, the most widely used in the fields of integrated circuits, semiconductor separate devices and other fields are most widely used in golden bonds.Due to the precious metal, the price is expensive and increasingly rising, bringing heavy cost pressure to the largest low -end LED and IC packaging users.Therefore, the industry is urgently needed for relatively low cost and stable and reliable performance.Silver calcium alloy bonds with high sterling silver as the main material have the advantages of both silver -based bonds, as well as the advantages of golden bonds.Silk. Invention content [0003] The purpose of the present invention is to provide a silver calcium calcium alloy key and its manufacturin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/49H01L21/48C22C5/06C22F1/14
CPCH01L24/43H01L2224/45139H01L2224/43H01L2224/43848H01L2224/45015H01L2224/45H01L2924/00011H01L2924/01057H01L2924/0102H01L2924/01079H01L2924/013H01L2924/00H01L2924/20751H01L2924/20752H01L2924/20753H01L2924/20754H01L2924/20755H01L2924/00014H01L2924/00012H01L2924/01049
Inventor 徐云管李湘平彭庶瑶梁建华涂海情
Owner 江西蓝微电子科技有限公司
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