Method of manufacturing scandate cathode with scandium oxide film
US5064397A · kind A · utility
6Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Feb 16, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/047
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
For maintaining a monolayer of scandium which is necessary for a satisfactory emission on the surface of a scandate cathode, at least the top layer of the cathode is provided with scandium coated with a scandium oxide film. Even after repeated ion bombardment the emission is found to recover up to approximately 90% of the initial value at a current density of ca. 100 A/cm.sup.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.