Method of producing metallic microscale cold cathodes

U.S. Patent Number: 5389026

Abstract: Microscale cold cathodes include a metallic emitter tip with a very sharp end. The microscale cold cathodes are manufactured by forming a cone of metal on a substrate, oxidizing the surface of the cone, and removing the oxidized film from the cone surface to produce an emitter tip.

Inventors: Fukuta; Shinya (Kawasaki, JP), Betsui; Keiichi (Kawasaki, JP)

Assignee: Fujitsu Limited (Kawasaki, JP)

Application Number: 08/082,170

Issued: 1995-02-14

Expired: 2007-02-14

Classes: 445/24 ; 204/221; 445/50

Field of search: 445/24,50,51 205/221,229

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