Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Reexamination Certificate
2007-05-08
2007-05-08
Patel, Ashok (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Vacuum-type tube
C313S309000, C313S336000, C313S351000
Reexamination Certificate
active
10806803
ABSTRACT:
A stable field-emission electron source that does not suffer from a current drop even after a high-current density operation for a long time is provided. The field-emission electron source includes: a substrate; an insulating layer that is formed on the substrate and that has a plurality of openings; cathodes arranged at the respective openings in order to emit electron beams; a lead electrode formed on the insulating layer in order to control emission of electrons from the respective cathodes; and a surface-modifying layer formed on the surface of each of the cathodes emitting electrons, comprising a chemical bond between a cathode material composing the cathodes and a material different from the cathode material.
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Kanemaru Seigo
Koga Keisuke
Nagao Masayoshi
Shiota Akinori
Yamamoto Makoto
Hamre Schumann Mueller & Larson P.C.
National Institute of Advanced Industrial Science and Technology
Patel Ashok
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