Electron tube comprising a semiconductor cathode
US5850087A · kind A · utility
1Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/308
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
By providing a semiconductor device such as a cold cathode (7) with extra zener or avalanche structures (26, 27 and 32, 33, respectively) a robust structure is obtained which is resistant to damage during manufacture and use of a vacuum tube. The semiconductor zones (26, 27, 32, 33) are thus also utilized for realizing electron optics (particle optics).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.