Composition and process for stripping tin from copper surfaces

Details Composition and process for stripping tin from copper surfaces Composition and process for stripping tin from copper surfaces

1992-03-04

1993-08-10

Dang, Thi

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156664, 252 792, 134 3, 134 41, C23G 102

Patent

active

052345424

ABSTRACT:
A composition for stripping tin, and any underlying copper-tin intermetallic, from a copper surface, the composition being an aqueous solution of sulfuric acid and at least one member selected from an inorganic nitrate, preferably ferric nitrate, and nitric acid, and mixtures thereof.

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