Monolithic capacitor and method of manufacturing it
US4467396A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1983 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Mar 21, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/435
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a monolithic capacitor of an insulating body of densely sintered ceramic material having electrically conductive layers interleaved parallel to and spaced from each other, extending alternately to one of two opposite outer surfaces of the insulating body where they are connected together by metal connecting layers to form the two plates of the capacitor. In order to obtain a very high capacitance per unit of volume, the insulating body is a semiconductive strontium titanate ceramic with grain-boundary barrier layers. In view of the fact that, in the case of such a ceramic, noble metals would diffuse into the grain-boundary barrier layer and reduce the insulation resistance, the electrically conductive layers of non-noble metals or metal alloys are injected into open-pore hollow spaces which form a network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.