Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1992-02-19
1993-03-16
Beck, Shrive
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427125, 427304, 427305, 427404, 427437, 427438, 4274431, B05D 512, B05D 118, C25D 1134
Patent
active
051942950
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: 3986255 (1976-10-01), Mandal
patent: 4465742 (1989-09-01), Nagashima
patent: 4474838 (1984-10-01), Halecky et al.
patent: 4495255 (1985-01-01), Draper et al.
patent: 4675243 (1987-06-01), Obinata et al.
patent: 4804559 (1989-02-01), Ushio et al.
patent: 4956026 (1990-09-01), Bell
patent: 4963974 (1990-10-01), Ushio et al.
Beck Shrive
General Electric Company
Maiorana David M.
Pittman William H.
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