Electron tube comprising a semiconductor cathode
US6552485B2 · kind B2 · utility
2Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1999 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Jun 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/308
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron tube provided with a semiconductor cathode for emitting electrons, which semiconductor cathode is arranged on a support, a source being arranged in the vicinity of the cathode, in particular, so as to face the free (Si) surface of the cathode, which source is capable of evolving, at the increased temperatures occurring during evacuation of the tube in the manufacturing process, a reducing agent such as F2 or HF, which passivates the free (Si) surface of the cathode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.