Method of making a self protected thyristor
US4514898A · kind A · utility
6Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Feb 18, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S438/965
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a thyristor self-protected against overvoltage by the avalanche mechanism, the protection resulting from a laser scribed ring shaped groove cut in the top surface of the thyristor and extending into one base region of the thyristor whereby the forward blocking junction is contoured toward the reverse blocking junction under the ring shaped groove, and to the process for making the thyristor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.