Process for improving leakage and dissipation factor of solid electrolytic capacitors employing conductive polymer cathodes
US6191013A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Dec 16, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The adhesion of a conductive polymer film to an oxidized porous pellet anode is improved by the incorporation of a silane coupling agent in the polymer impregnating solution. The incorporation of the silane coupling agent also decreases leakage current and dissipation factor. Suitable silanes are those of the general formula (R.sup.1 --R.sup.3)--Si--(OR.sup.2).sub.3. Each of R.sup.2 and R.sup.3 is a C.sub.1 -C.sub.6 alkyl group such as methyl, ethyl, or propyl R.sup.1 can be chosen from a wide variety of organic functional groups such as epoxy, glycidoxy, amino, and pyrrole. The most preferred silane is 3-glycidoxypropyltrimethoxysilane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.