Doped sintered tantalum pellets with nitrogen in a capacitor
US5825611A · kind A · utility
34Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1997 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Jan 29, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G9/052
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Doped tantalum pellets with nitrogen is described wherein the resulting pellets are substantially free of nitride precipitate on their outer surfaces. The tantalum pellets are formed by heating the pellets to a temperature of from about 1000.degree.-1400.degree. C. in a nitrogen gas atmosphere and then in a vacuum which causes nitrogen contacting a tantalum pellet to diffuse into the inner portion of the pellet instead of forming a precipitate. The resulting pellets have improved DCL stability and reliability in comparison to prior art nitrogen-doped tantalum pellets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.