Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
December 11, 2007
Patent Application Number
10952524
Date Filed
September 28, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
An electron emitter includes an emitter section having a plate shape, a cathode electrode formed on a front surface of the emitter section, and an anode electrode formed on a back surface of the emitter section. A gap is formed between an outer peripheral portion of the cathode electrode and the front surface of the emitter section. The front surface of the emitter section contacts a lower surface of the outer peripheral portion to form a base end as a triple junction. The gap expands from the base end toward a tip end of the outer peripheral portion.
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