Electron field emission device

Details Electron field emission device Electron field emission device

1990-12-19

1993-09-07

Yusko, Donald J.

Electric lamp and discharge devices

Discharge devices having a multipointed or serrated edge...

313351, 313336, H01J 102

Patent

active

052432521

ABSTRACT:
An electron emission device is employed as an electron emission source in various applications using an electron beam. The electron emission device has a cathode layer having an edge, and a control electrode spaced and electrically insulated from the cathode layer, for drawing electrons from said edge of the cathode layer. When a voltage is applied between the cathode layer and the control electrode, a developed electric field is concentrated on the edge of the cathode layer to cause the edge to emit electrons. The electron emission device can easily be manufactured with a high yield since it does not have a needle tip for emitting electrons. A method of manufacturing the electron emission device is also disclosed.

REFERENCES:
patent: 3665241 (1972-05-01), Spindt et al.
patent: 3755704 (1973-08-01), Spindt et al.
patent: 4168213 (1979-09-01), Hoeberechts
patent: 4578614 (1986-03-01), Gray et al.
patent: 4728851 (1988-03-01), Lambe
patent: 4828177 (1989-05-01), Lee et al.
"A Thin-Film Field-Emission Cathode", by C.A. Spindt, Journal of Applied Physics, vol. 39, No. 7, pp. 3504 and 3505, Feb., 1956.

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