Cyanide-free acidic matte silver electroplating compositions and methods
US10889907B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Feb 21, 2014 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Jul 28, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/46
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Cyanide-free acidic silver electroplating compositions include one or more acids or salts of tellurium and may be used to electroplate matte silver deposits on metals, such as nickel, copper or copper alloys. Matte silver metal may be electroplated at conventional plating rates or at high plating rates, such as in reel-to-reel and jet plating. The cyanide-free acidic silver electroplating compositions may be used to electroplate matte silver in the manufacture of electronic components such as electrical connectors, finishing layers for metallic substrates, optical devices and decorative applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.