Electron emission element
US5281891A · kind A · utility
25Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1992 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Feb 19, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J3/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron emission element includes an insulating substrate. A base electrode is formed on the insulating substrate. A plurality of emitters are formed on the base electrode and are arranged radially with respect to a given point. The emitters have wedge shapes with their respective tips facing inward. An insulating layer is formed on the substrate and the base electrode, and is spaced from the wedges of the emitters by given gaps. A control electrode is formed on the insulating layer for enabling electrons to be emitted from the tips of the wedge-shaped emitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.