Hetero-junction electron emitter with Group III nitride and activated alkali halide
US7446474B2 · kind B2 · utility
43Cited by
40References
22Claims
0Family size
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Key dates
| Filing date | Mar 25, 2005 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Aug 25, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/31779
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A photocathode is capable of generating an electron beam from incident light. The photocathode comprises a light permeable support having a light receiving surface and an opposing surface. A Group III nitride layer is provided on the opposing surface of the support. The Group III nitride layer comprises at least one Group III element and nitrogen. An alkali halide layer is provided on the Group III nitride layer. The alkali halide can be a cesium halide, such as cesium bromide or iodide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.