Thermally enhanced compound field emitter
US11335529B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Jun 21, 2021 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Jun 21, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/30426
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compound field emitter (CFE) includes a first surface possessing a field enhancement factor >1, and a second surface possessing one or both of a field enhancement factor >1, or a low work function, wherein the second surface is coated, formed or applied upon the first surface. The second surface has a characteristic size at least 3 times smaller than the first surface, and the outer surface includes a coating of calcium aluminate 12CaO-7Al2O3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.