Bright palladium electroplating baths
US4098656A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1977 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Sep 19, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/52
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The instant invention is particularly directed to a palladium electroplating bath and a method of plating therewith. The bath comprises essentially pure palladium free of alloying elements thereof and being in electrodepositable form, as well as a Class I brightener selected from the group consisting of methylene bis(napthlene sodium sulfonate), sodium benzene sulfonate, benzene sulfonimide and phenyl-sulfonic acid and a Class II organic brightener selected from the group consisting of benzaldehyde-o-sodium sulfonate, 2-butyne-1, 4-diol, 2 butene-1,4- diol and allyl sulfonate in order to improve the brightness of the deposit. The bath is particularly effective in plating palladium and alloys thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.