Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1987-10-28
1988-12-13
Roy, Upendra
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
148DIG140, 437192, 437194, 437220, H01L 21285
Patent
active
047910313
ABSTRACT:
In a lead frame for an IC which is provided on a wire bonding part of the inner lead unit thereof with an aluminum coating, possible detrimental diffusion of the component elements of the lead frame into the aluminum coating can be effectively precluded by having a layer of a high melting point metal interposed between the lead substrate and the aluminum coating in the wire bonding part without appreciably increasing the cost of production.
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patent: 4507852 (1985-04-01), Karulkar
patent: 4604291 (1986-08-01), Huang et al.
patent: 4673623 (1987-06-01), Gardner et al.
patent: 4680612 (1987-07-01), Hieber et al.
Roy Upendra
Sumitomo Metal & Mining Co., Ltd.
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