Cathode structure with emissive layer formed on a resistive layer
US6917147B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2003 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Mar 15, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J3/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A triode type cathode structure including a cathode assembly composed of a cathode electrode at least one electron emitter and a resistive layer inserted between the cathode electrode and the at least one electron emitter to connect them together electrically. The triode cathode structure also includes a grid electrode separated from the cathode assembly by a layer of electrical insulation. The cathode electrode is arranged in a first plane and the at least one electron emitter is arranged in a second plane parallel to the first plane and the cathode electrode and each electron emitter are separated by a same distance measured in a third plane parallel to the first and second planes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.