Field emission electron gun capable of minimizing nonuniform inf

Details Field emission electron gun capable of minimizing nonuniform inf Field emission electron gun capable of minimizing nonuniform inf

1997-05-08

1999-11-02

Patel, Ashok

Electric lamp and discharge devices

Discharge devices having a multipointed or serrated edge...

313308, 313307, 313336, 313351, H01J 102

Patent

active

059776960

ABSTRACT:
In a field emission electron gun including emitters (104) on predetermined parts of a substrate (109), an insulator film (105) on a remaining part of the substrate, a first gate electrode (101) on the insulator film so as to surround the emitters with a space left between each emitter and the first gate electrode and to have an outer peripheral surface defining an emission region (E), a gate edge portion (106) of a conductor is formed on the insulator film to surround the outer peripheral surface of the first gate electrode in contact with the outer peripheral surface of the first gate electrode. A second gate electrode (102) is formed on the insulator film to surround the gate edge portion with a distance left between the gate edge portion and the second gate electrode applied with a second voltage less than a first voltage applied to the first gate electrode.

REFERENCES:
patent: 4578614 (1986-03-01), Gray et al.
patent: 5191217 (1993-03-01), Kane et al.
patent: 5430347 (1995-07-01), Kane et al.

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