Ceramic articles having heat-sealable metallic coatings

Details Ceramic articles having heat-sealable metallic coatings Ceramic articles having heat-sealable metallic coatings

1991-06-21

1992-07-21

Lewis, Michael

Stock material or miscellaneous articles

All metal or with adjacent metals

Having composition, density, or hardness gradient

428672, B32B 514, B32B 710

Patent

active

051321858

ABSTRACT:
Nickel or cobalt diffusion is suppressed in ceramic articles having a nickel or cobalt underlayer followed by a gold overlayer, by heat-treating the article in a reducing atmosphere at a temperature of at least about 650.degree. C. and subsequently depositing a final gold layer. By suppressing the diffusion of nickel or cobalt, the adhesion of hermetic lids attached thereto by soldering is improved.

REFERENCES:
patent: 3677789 (1983-09-01), Bungardt et al.
patent: 4465742 (1984-08-01), Nagashima et al.
patent: 4495255 (1985-01-01), Draper et al.
patent: 4675243 (1987-06-01), Obinata et al.
patent: 4963974 (1990-10-01), Ushio et al.

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