Capacitor and method of manufacturing same
US7592626B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2006 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Jul 2, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D1/682
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A capacitor comprises: a lower electrode formed of a foil made of a polycrystalline metal; an upper conductor layer; and a dielectric layer disposed between the lower electrode and the upper electrode layer. Grain boundaries of the polycrystalline metal appear at the top surface of the lower electrode. The capacitor further comprises an insulator that is disposed between the top surface of the dielectric layer and the bottom surface of the upper electrode layer and that is present only in part of a region in which the top surface of the dielectric layer and the bottom surface of the upper electrode layer face each other. The insulator is disposed to cover at least part of the grain boundaries appearing at the top surface of the lower electrode when seen from above the top surface of the dielectric layer. The insulator is formed by electrophoresis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.