Electron-emitting devices having variously constituted electron-

Details Electron-emitting devices having variously constituted electron- Electron-emitting devices having variously constituted electron-

1993-11-24

1996-09-24

Snow, Walter E.

Electric lamp and discharge devices

Discharge devices having a thermionic or emissive cathode

313311, 313336, 313351, 313355, H01J 130

Patent

active

055593895

ABSTRACT:
A gated electron-emitting device contains a multiplicity of electron-emissive elements, each formed with a pedestal (98) and an overlying cone (94.sub.1). In each electron-emissive element, the base diameter of the cone is greater than the element, the base diameter of the cone is greater than the diameter of the pedestal. With the pedestal being electrically conductive, the cone may be electrically resistive. Alternatively, each electron-emissive element can be an elongated element (30B) that reaches a maximum diameter at a point between, and spaced apart from, both ends of the element.

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