Field emission device with gate having cylindrical part

Details Field emission device with gate having cylindrical part Field emission device with gate having cylindrical part

2007-06-19

2007-06-19

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

C313S309000, C313S336000, C313S351000

Reexamination Certificate

active

10686678

ABSTRACT:
The field emission device includes a substrate, a cathode, a gate insulating layer, an electron emitter, and a gate electrode. The cathode is formed on the substrate. The gate insulating layer is formed on the cathode and has a well exposing a portion of the cathode. The electron emitter is formed on the exposed portion of the cathode. The gate electrode is formed on the gate insulating layer and has a gate hole corresponding to the well. The gate electrode further includes a cylindrical electrode part that forms a focusing electric field from the gate hole toward a proceeding path of an electron beam. Accordingly, a focusing electric field can be formed around an electron beam emitted from the electron emitter so as to converge and focus the electron beam passing through the focusing electric field. As a result, color purity, brightness, and durability can be improved.

REFERENCES:
patent: 5448132 (1995-09-01), Komatsu
patent: 5451830 (1995-09-01), Huang
patent: 5489933 (1996-02-01), Betsui et al.
patent: 5509839 (1996-04-01), Liu
patent: 5548181 (1996-08-01), Jones
patent: 5786659 (1998-07-01), Takagi et al.
patent: 5942849 (1999-08-01), Cade
patent: 6008576 (1999-12-01), Nakatani et al.
patent: 7-65706 (1995-03-01), None
patent: 07065706 (1995-03-01), None
patent: P1999-0036808 (1999-05-01), None
*Korean Patent Office Action and English Translation.

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