Solid electrolytic capacitor
US6333844A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 2000 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | Oct 13, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G9/0425
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sintered body (10) made of valve action metal powders such as Ta powders, in which an anode lead (11) is embedded in one of wall faces is formed. A dielectric layer (oxide layer) (14) is formed around the metal powders. A manganese dioxide layer (15) is formed around the sintered body in which the dielectric layer is provided on the metal powders. A graphite layer is formed on the manganese dioxide layer. The graphite layer is made by an aqueous graphite layer (16) on the manganese dioxide layer side and a resin graphite layer (17) formed on the aqueous graphite layer. A metal layer (18) is formed on the graphite layer. In such a manner, a capacitor (1) element is formed. Preferably, the graphite layer is burned at a temperature ranging from 230 to 300.degree. C. As a result, an increase in impedance caused by a thermal stress between cathode layers is prevented. Thus, a solid electrolytic capacitor having a small impedance between the anode and the cathode is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.