Electron tube including a photocathode
US3931633A · kind A · utility
22Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1975 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Mar 5, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/3423
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A semiconductor photocathode is described in which the electron emission is obtained from a P-type semiconductor into which free electrons are injected from the source or drain of an FET whose channel is normally blocked. Incident photons absorbed in the channel region unblock the FET causing electron emission. Preferably, the device comprises an imaging array of FET's and associated electron emitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.