Nickel hypophosphite solutions containing increased nickel concentration
US5944879A · kind A · utility
4Cited by
12References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1998 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Jan 6, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C18/36
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention relates to aqueous solutions containing Ni cation and hypophosphite anion which have a Ni cation concentration greater than 36 grams/liter. Such solutions have utility in electroless nickel plating baths and processes as make-up solutions and replenishing solutions. The increased concentration of Ni cation results from the addition of the nickel salt of an alkyl sulfonic acid to the solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.