Electrolytic capacitor and method of making same
US5124022A · kind A · utility
14Cited by
18References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Oct 11, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S148/014
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved valve metal electrolytic capacitor is disclosed, such as an aluminum electrolytic capacitor, as well as a method of making same wherein the improvement comprises forming a hydration resistant composite layer on the valve metal, including a valve metal oxide dielectric layer, by anodizing the valve metal in an aqueous phosphorus-containing organic electrolyte selected from the class consisting of phosphonic acid, phosphinic acid and mixtures of the same dissolved in an aqueous liquid to provide an electrolytic capacitor with increased resistance to hydration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.