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:
Oct. 09, 2018
Filed:
Jul. 03, 2014
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Masashi Miwa, Tokyo, JP;
Haruna Nakajima, Tokyo, JP;
Koji Mitake, Tokyo, JP;
Chikara Ishizaka, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/01 (2006.01); H01F 1/057 (2006.01); H02K 1/02 (2006.01); H02K 1/27 (2006.01);
U.S. Cl.
CPC ...
H01F 1/01 (2013.01); H01F 1/0577 (2013.01); H02K 1/02 (2013.01); H02K 1/278 (2013.01);
Abstract
An R-T-B based sintered magnet having RTB crystal grains and a grain boundary formed by two or more adjacent RTB crystal grains. An R—Co—Cu—N concentrated part whose concentrations of R, Co, Cu and N are respectively higher than those in the RTB crystal grains may be in the grain boundary. An R—O—C concentrated part or an R—O—C—N concentrated part may be further provided in the grain boundary.