Method for manufacturing a solid electrolytic capacitor
US5071521A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Sep 6, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G9/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for fabricating a solid electrolytic capacitor is described, in which a solid electrolyte is made of a conductive polymer layer and is formed on a conductive inorganic layer which is formed on a metallic foil through a dielectric film. For the formation of the conductive polymer layer, while an external electrode is not directly contacted with the conductive inorganic layer, the electrolytic polymerization reaction of a polymerizable monomer in an electrolytic solution is carried out. For this purpose, the external electrode may be covered with a conductive polymer film at the contact portion. Alternatively, the external electrode may be moved from one position to another or may be kept apart from the conductive inorganic layer during the electrolytic polymerization reaction. By this, the mechanical damages of the conductive inorganic layer with the external electrode are suppressed with good electric characteristics of the capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.