The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 2002
Filed:
Feb. 28, 2001
Applicant:
Inventors:
Takashi Iwasa, Wako, JP;
Junzo Ishikawa, Kyoto, JP;
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/05 ;
U.S. Cl.
CPC ...
H01J 1/05 ;
Abstract
To provide a cold cathode element, which has a high practicability and is capable of emitting electrons sufficiently even at a low voltage applied. The cold cathode element emits electrons by application of an electric field to the element and is formed of an amorphous carbon film, the refractive index n of a surface of the film being equal to or larger than 2.5.