Electric lamp and discharge devices – Discharge devices having a thermionic or emissive cathode
Patent
1997-11-20
1999-03-23
Patel, Ashok
Electric lamp and discharge devices
Discharge devices having a thermionic or emissive cathode
313309, 313336, 313351, 313495, 313497, 313311, H01J 1924
Patent
active
058864601
ABSTRACT:
A field emitter device formed by a veil process wherein a protective layer comprising a release layer is deposited on the gate electrode layer for the device, with the protective layer overlying the circumscribing peripheral edge of the opening of the gate electrode layer, to protect the edge of the gate electrode layer during etching of the field emitter cavity in the dielectric material layer on a substrate, and during the formation of a field emitter element in the cavity by depositing a field emitter material through the opening. The protective layer is readily removed subsequent to completion of the cavity etching and emitter formation steps, to yield the field emitter device. Also disclosed are various planarizing structures and methods, and current limiter compositions permitting high efficiency emission of electrons from the field emitter elements at low turn-on voltages.
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Jones Gary W.
Jones Susan K. Schwartz
Silvernail Jeffrey A.
Zimmerman Steven M.
FED Corporation
Patel Ashok
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