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. 01, 2009
Filed:
Jan. 10, 2007
Applicants:
Keisuke Yamamoto, Yamato, JP;
Tamaki Kobayashi, Isehara, JP;
Inventors:
Keisuke Yamamoto, Yamato, JP;
Tamaki Kobayashi, Isehara, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 9/12 (2006.01); H01J 9/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an electron-emitting device having a pair of electroconductors arranged on a substrate at an interval, a top of one electroconductor is higher than that of the other electroconductor and a groove extending from the interval region toward a position under a region where the one electroconductor is come into contact with the substrate is formed on the substrate. Deterioration of the electron-emitting device due to collision of charged particles is suppressed by the asymmetrical electron-emitting region, electron-emitting efficiency is improved, and a long life is realized.