Solid electrolytic capacitors and method for manufacturing the same
US5187650A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1992 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Apr 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Solid electrolytic capacitors comprise a valve metal member having a dielectric oxide film and a conductive underlying layer formed on the member in this order, and a conductive polymer film formed on the layer. The conductive polymer film is formed by electrolytic polymerization of a polymerizable monomer contained in a system containing the monomer and a support electrolyte consisting of a compound having at least one nitro group. By this, high temperature stability of the capacitor is significantly improved. Alternatively, the electrolytic polymerization may be effected in a system which comprises a monomer, a support electrolyte and a phenol or phenoxide derivative having at least one nitro group. Methods for fabricating such capacitors are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.