Aqueous electronic circuit assembly cleaner and method
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United States of America Patent
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Feb 28, 1995
Issued Date -
N/A
app pub date -
Jun 9, 1993
filing date -
Jul 17, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to environmentally safe aqueous cleaning 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 with an alkali metal silicate to achieve a variety of objectives, among which are the removal of solder flux, oils, waxes, and greasy substances, adhesives and other residues as well as provide anti-corrosion protection and metal brightening.
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