Lead member with multiple conductive layers and specific grain s

Details Lead member with multiple conductive layers and specific grain s Lead member with multiple conductive layers and specific grain s

1997-05-28

2000-10-31

Gaffin, Jeffrey

Electricity: conductors and insulators

Conduits, cables or conductors

174250, 257690, H05K 100

Patent

active

061405833

ABSTRACT:
A lead member for electronic parts which has excellent heat resistance, oxidation resistance and corrosion resistance and is especially excellent in solderability and a process of producing such a lead member at low cost by plating are provided. The lead member comprises a base, at least a surface region of which is made of Cu or a Cu alloy, a primary coat of Ni, Co, a Ni alloy or a Co alloy and a surface layer of Pd, Ru, a Pd alloy or a Ru alloy formed sequentially on the base in the order mentioned. The primary coat consists of grains having a grain size of 20 .mu.m or more.

REFERENCES:
patent: 5583379 (1996-12-01), Sato et al.
patent: 5635755 (1997-03-01), Kinghorn

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