Electron tube with polycrystalline diamond photocathode
US5982094A · kind A · utility
13Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Sep 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2231/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A photocathode includes a first layer of polycrystalline diamond or a material mainly composed of polycrystalline diamond. The first layer of polycrystalline diamond may be terminated with hydrogen, or oxygen, and a second layer of an alkali metal or compound of an alkali metal, may be provided on the first layer of polycrystalline diamond whose surface is terminated with hydrogen or oxygen. The photocathode can be use for both reflection and transmission electron tubes and can yield a quantum efficiency higher than that in a monocrystal diamond thin film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.