METHOD OF MANUFACTURING ANODE UNIT FOR SOLID ELECTROLYTIC CAPACITOR, ANODE UNIT FOR SOLID ELECTROLYTIC CAPACITOR, CONTINUOUS SINTERING APPARATUS, AND METHOD OF MANUFACTURING SECONDARY PARTICLES OF VALVE-ACTION METAL POWDER
US6350406B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Nov 3, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G9/052
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a sintered anode unit for a solid electrolytic capacitor is provided. According to this method, a press-molded or compacted pellet of a valve-action metal powder is sintered at a predetermined high temperature and in a predetermined primary vacuum. The pellet is naturally cooled in this primary vacuum, and is cooled by force cooling in an inert gas atmosphere. Thereafter, the sintered pellet is subjected to a repeated cycle processing of vacuum, atmospheric leakage, and vacuum in a gradual-oxidizing chamber. The atmospheric leakage level is increased step by step to set the vacuum level in the gradual-oxidizing chamber to the atmospheric pressure. Then, the sintered pellet having the restricted content of oxygen is taken out from the gradual-oxidizing chamber into the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.