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:
Dec. 01, 2015
Filed:
Jul. 02, 2014
Applicants:
Satomi Sabu, Shizuoka, JP;
Shinji Ohtani, Shizuoka, JP;
Inventors:
Satomi Sabu, Shizuoka, JP;
Shinji Ohtani, Shizuoka, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G 15/02 (2006.01); G03G 21/18 (2006.01); H01T 19/00 (2006.01); H01J 3/02 (2006.01);
U.S. Cl.
CPC ...
G03G 15/02 (2013.01); H01J 3/021 (2013.01); H01T 19/00 (2013.01); G03G 15/0291 (2013.01); G03G 21/18 (2013.01);
Abstract
A charger to apply a charge to an object is provided. The charger includes an electron emitter including an electroconductive substrate; and a layer of n-type hexagonal boron nitride codoped with magnesium and oxygen atoms, which is located on the electroconductive substrate, wherein the concentration of oxygen atoms in the layer of n-type hexagonal boron nitride codoped with magnesium and oxygen atoms is higher than the concentration of magnesium atoms in the layer.