Aqueous electronic circuit assembly cleaner and method

Details Aqueous electronic circuit assembly cleaner and method Aqueous electronic circuit assembly cleaner and method

1992-11-20

1994-03-22

Breneman, R. Bruce

Cleaning and liquid contact with solids

Processes

Oils, grease, tar, or wax removal, by dissolving

134 2, 25217414, C23G 506

Patent

active

052960412

ABSTRACT:
The present invention relates to environmentally safe aqueous saponifier compositions for cleaning electronic circuit assemblies, such as printed circuit or printed wiring boards, during their fabrication. Alkali metal carbonate and bicarbonate salts are utilized preferably with various adjuvants, such as a reducing agent, antioxidant, or antifoam agent, to achieve a variety of objectives, among which are the removal of solder flux, oils, waxes, and greasy substances and adhesive and other residues.

REFERENCES:
patent: 4236935 (1980-12-01), Schoenholz et al.
patent: 4457322 (1984-07-01), Rubin et al.
patent: 4740247 (1988-04-01), Hayes et al.
patent: 4844744 (1989-07-01), Leiter et al.
patent: 4904571 (1990-02-01), Miyashita et al.
patent: 5114609 (1992-05-01), Buchwald et al.

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