Additive for electrodeposition of bright tin and tin-lead alloy
US3956123A · kind A · utility
16Cited by
0References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1975 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Mar 12, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/32
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention disclosed herein relates to the electrolytic deposition of bright tin and tin-lead alloy. This invention is embodied in a new plating bath and a plating bath additive. The new plating bath includes tin or tin and lead ions, sulfuric acid or fluoboric acid, and the new additive. The new additive includes an emulsified naphthalene monocarboxaldehyde with or without a substituted olefin, having the general formula: ##EQU1## in which R.sub.1 is carboxy, carboxamido, alkali carboxylate, ammonium carboxylate, amine carboxylate, or alkyl carboxylate, and R.sub.2, R.sub.3, and R.sub.4 are hydrogen, methyl, or lower alkyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.