Field emission element
US5469014A · kind A · utility
Inventors
Key dates
| Filing date | Feb 3, 1992 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | Feb 3, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/30426
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A field emission element including a gate and an emitter and capable of preventing any of the element oxide layer from being formed on a tip of the emitter to prevent a decrease in emission current, unstable operation and an increase in noise. The gate has a surface formed of a material of oxygen bonding strength higher than that of a material for at least a tip surface of the emitter, so that oxygen atoms and molecules containing oxygen entering the gate may be captured by adsorption on the gate to prevent formation of any oxide layer on the emitter. When a portion of the emitter other than the tip surface is formed of a material of oxygen bonding strength higher than that of the material for the tip surface, formation of any oxide layer on the tip surface of the emitter is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.