Silver coatings

Details Silver coatings Silver coatings

1990-06-28

1993-02-16

Beck, Shrive

Coating processes

Immersion or partial immersion

Chemical compound reducing agent utilized

427304, C23C 2600

Patent

active

051869845

ABSTRACT:
A cyanide-free, ammoniacal silver solution comprising a chelant, e.g. EDTA, and soluble copper, e.g. cupric nitrate, at a level of at least about 1 mole copper/mole silver provides silver replacement coatings on copper-coated articles. Silver coatings have a low surface electrical resistivity, e.g. as low as about 0.02 to 0.05 ohms/square.

REFERENCES:
patent: 2327723 (1940-07-01), Levaggi
patent: 3900320 (1975-08-01), Rolker
patent: 3920864 (1975-11-01), Greenberg et al.
patent: 3978271 (1976-08-01), Greenberg
patent: 3993845 (1976-11-01), Greenberg et al.
patent: 4128671 (1978-12-01), Suggs
patent: 4144361 (1979-03-01), Feldstein

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