Field emission type cold cathode device with conical emitter ele

Details Field emission type cold cathode device with conical emitter ele Field emission type cold cathode device with conical emitter ele

1996-05-29

1998-04-14

Patel, Ashok

Electric lamp and discharge devices

Discharge devices having a multipointed or serrated edge...

313336, 313351, 313497, 313310, H01J 1736

Patent

active

057396280

ABSTRACT:
A field emission type cold cathode device has a substrate whose upper surface is conductive, an insulating layer deposited on the conductive surface, a conductive gate layer, and a conical emitter electrode having a sharp apex formed in an opening in the insulating layer and the gate electrode. The insulating layer includes a first insulating film and a second insulating film. The insulating layer in the opening has an exposed surface arranged so that electrons emitted from near an end portion of the first insulating film are kept away from exposed surfaces of the insulating layer. In one form, the exposed surface of the first insulating film is disposed at a level lower than an unexposed surface of the first insulating film thus forming a recess. In another form, the second insulating film exposed in the opening is recessed relative to the first insulating film exposed in the opening.

REFERENCES:
patent: 5162704 (1992-11-01), Kobori et al.
patent: 5394006 (1995-02-01), Liu
C. Miller, "Surface Flashover of Insulators", IEEE Translations on Electrical Insulation, vol. 24, No. 5, pp. 765-786, Oct. 1989.
C.A. Spindt et al., "Physical properties of thin-film field emission cathodes with molybdenum cones", Journal of Applied Physics, vol. 47, No. 12, Dec. 1976, pp. 5248-5263.

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