Semiconductor cathode with increased stability

Details Semiconductor cathode with increased stability Semiconductor cathode with increased stability

1989-01-18

1989-12-26

Wieder, Kenneth

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313444, 313446, H01J 2904

Patent

active

048900311

ABSTRACT:
The stability of semiconductor cathodes is improved by reducing the effective emitting surface area. This is effected by producing emission patterns by means of separate emission regions, whose overall surface area is much smaller than that of the actual emission patter. Due to the higher emission current and adjustment current, adsorbed particles, which adversely affect the stability of the emission, are rapidly drained.

REFERENCES:
patent: 4325084 (1982-04-01), van Gorkom et al.
patent: 4370797 (1983-02-01), van Gorkom et al.
patent: 4574216 (1986-03-01), Hoeberechts et al.

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