Field-emission cathode capable of forming an electron beam havin

Details Field-emission cathode capable of forming an electron beam havin Field-emission cathode capable of forming an electron beam havin

1997-11-03

1999-07-27

O'Shea, Sandra

Electric lamp and discharge devices

Discharge devices having a multipointed or serrated edge...

313336, 313351, H01J 102

Patent

active

059295570

ABSTRACT:
A field-emission cold cathode has a conductive cold-cathode substrate on which a plurality of conical emitters and a base insulator layer are formed. A ring-shaped gate electrode, a plate-shaped inner electrode, and a ring-shaped outer electrode are formed on the base insulator layer with the ring-shaped gate electrode disposed between the plate-shaped inner electrode and the ring-shaped outer electrode. A voltage supplying unit supplies the ring-shaped gate electrode, the plate-shaped inner electrode, and the ring-shaped outer electrode with a gate voltage, an inner electrode voltage, and an outer electrode voltage, each referenced to a substrate potential of the conductive cold-cathode substrate, wherein the gate voltage is higher than each of the inner electrode voltage and the outer electrode voltage.

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