Corrosion-resistant copper materials and making method

Details Corrosion-resistant copper materials and making method Corrosion-resistant copper materials and making method

1998-04-03

2000-08-15

Ip, Sikyin

Metal treatment

Stock

Copper base

148279, 148282, 148687, 148433, 148434, 148435, 428547, 428674, 4272551, 427399, C22C 900

Patent

active

061030260

ABSTRACT:
A corrosion-resistant copper material has a surface layer of a copper alloy containing 10-50 at % (i.e. % by atom) of silicon and of 10-1,000 .ANG. thick. It is produced simply by annealing a copper material containing 0.01-5 at % of silicon at 100-600.degree. C. in a hydrogen-containing gas. Because of its excellent resistance to surface corrosion due to heat and aging, the resulting copper material lends itself well to automotive and electrical applications requiring heat resistance, and is also suitable for use in electrical wire and in leadframes for semiconductor devices.

REFERENCES:
patent: 4822642 (1989-04-01), Cabrera et al.
Li, Jian et al, J. Appl. Phys., 70(5), pp. 2820-2827 (1991), Oxidation and Protection in Copper and Copper Alloy Thin Films.
C. Lee et al., 1.sup.st Electronic Packaging Technology Conference, pp. 201-207, 1997, The Role of Surface Morphology on Interfacial Adhesion in IC Packaging.
T. Sato et al., Japan Electric Material Association, 34.sup.th Lecture in Autumn, (1997) (partial translation).

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