Metal stripping process and composition

Details Metal stripping process and composition Metal stripping process and composition

1982-08-09

1984-01-03

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

134 3, 156664, 252 792, 252 794, C23F 102, B44C 122

Patent

active

044240970

ABSTRACT:
A stripper, for the removal of tin and tin compounds, in particular copper metal-resists in contact switches, comprises an aqueous solution of 5 to 20% v/v hydrochloric acid, 2.5 to 6.0 g/l copper and 9 to 40 g/l tin, as well as, at the beginning of the stripping process, up to 0.5 ml/l hydrogen peroxide or up to 0.015 ml/l of a surfactant.

REFERENCES:
patent: 4260451 (1981-04-01), Schmeckenbecher

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