Etch solutions having bis(perfluoroalkylsulfonyl)imides, and use thereof to form anode foils with increased capacitance
US10604862B2 · kind B2 · utility
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36References
10Claims
0Family size
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Key dates
| Filing date | Aug 10, 2018 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Nov 23, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25F3/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Anode foil, preferably aluminum anode foil, is etched using a process of treating the foil in an electrolyte bath composition comprising a sulfate, a halide, an oxidizing agent, and a surface active agent. The anode foil is etched in the electrolyte bath composition by passing a charge through the bath. The etched anode foil is suitable for use in an electrolytic capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.