Field emission cold cathode having concentric cathode areas and

Details Field emission cold cathode having concentric cathode areas and Field emission cold cathode having concentric cathode areas and

1997-06-26

1999-04-13

Patel, Nimeshkumar D.

Electric lamp and discharge devices

Discharge devices having a multipointed or serrated edge...

313336, 313495, H01J 102

Patent

active

058941878

ABSTRACT:
A field emission cold cathode comprises a silicon substrate, a first insulation layer defining peripheries of a first and second feeder area disposed concentric with each other, a cathode area having a plurality of conical emitters overlying the first insulation layer, and a gate electrode layer having a plurality of openings each for applying electric field to each of the conical emitter. The cathode area has a narrower width than the width of the underlying insulating zone, wherein the cathode area has peripheries apart by fixed distance L from the peripheries of the feeder area. In this configuration, a uniform emitter current can be attained among the emitters to thereby obtain a high luminescence and high resolution CRT.

REFERENCES:
patent: 5194780 (1993-03-01), Meyer
patent: 5502347 (1996-03-01), Dworsky et al.
patent: 5635791 (1997-06-01), Vickers
patent: 5666024 (1997-09-01), Vickers
patent: 5726530 (1998-03-01), Peng
patent: 5767619 (1998-06-01), Tsai et al.
Patent Abstract of Japan, vol. 095, No. 009, Oct. 31, 1995.
Patent Abstract of Japan, vol. 095, No. 004, Jan. 24, 1995.

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