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:
May. 07, 2013
Filed:
May. 13, 2008
Applicants:
Yoshinori Terui, Tokyo, JP;
Ryozo Nonogaki, Tokyo, JP;
Inventors:
Yoshinori Terui, Tokyo, JP;
Ryozo Nonogaki, Tokyo, JP;
Assignee:
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 1/26 (2006.01); H01J 1/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided is an electron source which provides a stable electron beam even when vibration is applied from external to a device which uses the electron source. The electron source is provided with a needlelike chip () having an electron emitting section at one end; a cup-like component () bonded to the other end of the needlelike chip (); and a filament () for heating the cup-like component (). The filament () is arranged in a gap inside the cup-like component (), in a noncontact state to the cup-like component ().