Electric lamp and discharge devices – Electrode and shield structures – Point source cathodes
Patent
1996-02-27
1998-02-10
Horabik, Michael
Electric lamp and discharge devices
Electrode and shield structures
Point source cathodes
313309, 313495, 313414, 313447, H01J 130, H01J 1924
Patent
active
057172790
ABSTRACT:
A field emission cold cathode includes a conductive substrate (1), an insulating layer (2) disposed on the substrate (1), a gate electrode (3) disposed on the insulating layer (2), cavities (4) extending through the gate electrode (3) and the insulating layer (2), and emitter cones (6) disposed on the substrate (1) within the cavities (4). The gate electrode further includes high resistance areas (5) disposed around the tips of the emitter cones (6) that enables the field emission cold cathode to operate in the event of a short circuit between the gate electrode (3) and an emitter cone (6) due to electrically conductive foreign material entering a cavity (4). The field emission cold cathode can be use in an electron gun.
REFERENCES:
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patent: 5396150 (1995-03-01), Wu et al.
patent: 5514847 (1996-05-01), Makishima et al.
patent: 5534744 (1996-07-01), Leroux et al.
patent: 5559390 (1996-09-01), Makishima et al.
patent: 5578900 (1996-11-01), Peng et al.
C.A. Spindt, "A Thin-Film Field-Emission Cathode", Journal of Applied Physics, vol. 39, 1968, pp. 3504-3505.
Day Michael
Horabik Michael
NEC Corporation
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