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:
Sep. 26, 2006
Filed:
Apr. 20, 2004
Applicants:
Makoto Yamamoto, Takarazuka, JP;
Keisuke Koga, Soraku-gun, JP;
Akinori Shiota, Ibaraki, JP;
Seigo Kanemaru, Tsukuba, JP;
Masayoshi Nagao, Tsukuba, JP;
Inventors:
Makoto Yamamoto, Takarazuka, JP;
Keisuke Koga, Soraku-gun, JP;
Akinori Shiota, Ibaraki, JP;
Seigo Kanemaru, Tsukuba, JP;
Masayoshi Nagao, Tsukuba, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H01J 63/02 (2006.01); H01J 1/304 (2006.01); H01J 1/46 (2006.01);
U.S. Cl.
CPC ...
Abstract
A field emission electron source capable of achieving large current density is provided at low cost with good productivity. An insulating layer is formed on a substrate and has one or more openings; and an extraction electrode is formed on the insulating layer. In one or more of the openings, a plurality of emitters, each of which emits an electron by an electric field from the extraction electrode, are formed on the substrate.