Additive processing electroless metal plating using aqueous phot

Details Additive processing electroless metal plating using aqueous phot Additive processing electroless metal plating using aqueous phot

1985-03-29

1986-03-04

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156668, 156902, 427 96, 427304, 427305, 427307, B44C 122, C03C 1500, B05D 512, B29C 1708

Patent

active

045740313

ABSTRACT:
In a method for making a printed circuit board employing an aqueous type photoresist and including etching of the substrate surface with chromic acid after application of the photoresist mask, chromium is washed from the surface with a reducing agent at a pH of .ltoreq.10.

REFERENCES:
patent: 4042387 (1977-08-01), Tarakci
patent: 4304681 (1981-12-01), Martin et al.
patent: 4351895 (1982-09-01), Walls
patent: 4355095 (1982-10-01), Cousins
patent: 4388351 (1983-06-01), Sawyer

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