Life extension of catalyst predip baths

Details Life extension of catalyst predip baths Life extension of catalyst predip baths

1984-06-21

1985-08-06

Smith, John D.

Coating apparatus

Immersion or work-confined pool type

With tank structure, liquid supply, control, and/or...

210205, 210207, 427306, C23C 302

Patent

active

045328870

ABSTRACT:
A method and apparatus for extending the useful life of an acqueous acid chloride solution that serves as a protective bath for an activator dip bath such as used in electroless copper plating. Means are provided for recirculating the acidic chloride solution over metallic tin to precipitate copper ions from the solution. The precipitated copper is filtered from the solution to extend its useful life.

REFERENCES:
patent: 1426141 (1922-08-01), Belke
patent: 1511967 (1924-10-01), Holland
patent: 1981715 (1934-11-01), Atkinson
patent: 3562038 (1971-02-01), Shipley
patent: 3669853 (1972-06-01), Beach
patent: 3694250 (1972-09-01), Grunwald
patent: 3819497 (1974-06-01), Grunwald
patent: 3865623 (1975-02-01), Allen
patent: 3905827 (1975-09-01), Goffredo
patent: 3922208 (1975-11-01), Cordone

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