Patent · US Expired

Electron tube comprising a semiconductor cathode

US5604355A · kind A · utility

2Cited by
8References
2Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMay 16, 1995
Grant dateFeb 18, 1997
Priority date
Expiry dateMay 16, 2015

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01J1/308
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

By providing a semiconductor device such as a cold cathode (7) with extra zener or avalanche structures (26, 27 and 32, 33, respectively) a robust structure is obtained which is resistant to damage during manufacture and use of a vacuum tube. The semiconductor zones (26, 27, 32, 33) are thus also utilized for realizing electron optics (particle optics).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.