Method of reducing work function in carbon coated LaB6 cathodes
US9790620B1 · kind B1 · utility
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7References
9Claims
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Key dates
| Filing date | Jan 6, 2017 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Jan 6, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/148
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method to reduce the work function of a carbon-coated lanthanum hexaboride (LaB6) cathode wherein the exposed tip of the cathode is exposed to moisture between two heat treatments is provided. The work function may be reduced by 0.01 eV or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.