Method of producing microrods for electron emitters, and associated microrods and electron emitters
US11651924B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2022 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | Jun 22, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/06341
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods of producing microrods for electron emitters and associated microrods and electron emitters. In one example, a method of producing a microrod for an electron emitter comprises providing a bulk crystal ingot, removing a first plate from the bulk crystal ingot, reducing a thickness of the first plate to produce a second plate, and milling the second plate to produce one or more microrods. In another example, a microrod for an electron emitter comprises a microrod tip region that comprises a nanoneedle that in turn comprises a nanorod and a nanoprotrusion tip. The microrod and the nanoneedle are integrally formed from a bulk crystal ingot by sequentially: (i) removing the microrod from the bulk crystal ingot; (ii) coarse processing the microrod tip region to produce the nanorod; and (iii) fine processing the nanorod to produce the nanoprotrusion tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.