Automatically focusing field emission electrode
US4874981A · kind A · utility
134Cited by
13References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 10, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | May 10, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J3/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Several embodiments of a thin film field emission cathode array are described which automatically shape the beams of emitted particles, without the addition of shaping or other electrode structure. A potential field pattern is established to control the trajectory of the emitted particles, by controlling the electromagnetic interaction of the conductive structures responsible for the particle emission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.