Electron tube with a cesium source
US6236154A · kind A · utility
0Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1999 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Mar 4, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/308
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an electron tube based on a cold cathode, a cesium source (17) containing Cs.sub.x --Au.sub.y or Cs.sub.x --Sb.sub.y is provided near the cold cathode (7), preferably in contact with the first grid (9). Cesium is introduced into the source during activation of the tube. The vapor pressure of the cesium compounds is such that proper delivery of cesium is guaranteed throughout the life-time of the cathode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.