Field emitter with diamond emission tips
US5341063A · kind A · utility
56Cited by
23References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1992 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Nov 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/30457
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A field emitter comprising a conductive metal and a diamond emission tip with negative electron affinity in ohmic contact with and protruding above the metal. The field emitter is fabricated by coating a substrate with an insulating diamond film having negative electron affinity and a top surface with spikes and valleys, depositing a conductive metal on the diamond film, and applying an etch to expose the spikes without exposing the valleys, thereby forming diamond emission tips which protrude a height above the conductive metal less than the mean free path of electrons in the diamond film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.