Alloys or metallic compositions – Gold base
Patent
1991-05-31
1994-03-29
Dean, R.
Alloys or metallic compositions
Gold base
420508, 420509, 420510, 420511, 420512, 228904, C22C 502
Patent
active
052982190
ABSTRACT:
Bonding wire for a semiconductor device contains high purity Au or Au alloy as a base metal and 25-10000 atppm of low boiling point element I having a boiling point lower than a melting point of the base metal and soluble in Au, or contains high purity Au or Au alloy as a base metal and 5-500 atppm of low boiling point element II having a boiling point lower than a melting point of the base metal and insoluble in Au, or contains high purity Au or Au alloy as a base metal and 5-10000 atppm of a mixture of low boiling point element I having a boiling point lower than a melting point of the base metal and soluble in Au and low boiling point element II having a boiling point lower than the melting point of the base metal and insoluble in Au under the condition of (content of the low boiling point element I)/25+(content of the low boiling point element II)/5.gtoreq.1.gtoreq.(content of the low boiling point element I)/10000+(content of the low boiling point element II)/500. The low boiling point elements I and II may be replaced by low boiling point element III soluble in Pd and low boiling point element IV insoluble in Pd, respectively.
REFERENCES:
Bruce L. Gehman, "Gold Wire for Automated Bonding", Solid State Technology; Mar. 1980, pp. 84-91.
Iga Hiroto
Kujiraoka Takeshi
Murakami Kensei
Nagamatsu Ichiro
Shirakawa Shinji
Dean R.
Phipps Margery S.
Tanaka Denshi Kogyo Kabushiki Kaisha
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