Aqueous electronic circuit assembly cleaner and method
US5234506A · kind A · utility
31Cited by
32References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1992 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Jun 10, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/122
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.