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1. (WO1983000415) METHOD OF PRESERVING THE SOLDERABILITY OF COPPER

Pub. No.:    WO/1983/000415    International Application No.:    PCT/US1982/000846
Publication Date: Fri Feb 04 00:59:59 CET 1983 International Filing Date: Thu Jun 24 01:59:59 CEST 1982
IPC: C23F 11/14
H05K 3/28
Applicants: WESTERN ELECTRIC COMPANY, INC.
Inventors: PARKER, John, Le Roy, Jr.
RANES, Robert, Bruce
Title: METHOD OF PRESERVING THE SOLDERABILITY OF COPPER
Abstract:
Method for preserving the solderability of copper conductors by stabilizing a cleaned, mildly etched conductor surface with a phosphoric acid - glycol solution then immersing the surface in imidazole followed by a rinse to remove excess imidazole.