Methods of manufacturing a dispenser cathode and dispenser cathode manufactured according to the method
US4625142A · kind A · utility
13Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1983 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Mar 21, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dispenser cathode body is manufactured from a sintered metallic powder. A large scandium oxide concentration is provided beneath an emissive surface of the body, resulting in increased life, increased current density, and decreased sensitivity to ion bombardment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.