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:
Jan. 07, 2020
Filed:
Sep. 07, 2016
Tdk Corporation, Tokyo, JP;
Naoto Tsukamoto, Tokyo, JP;
Hiroshi Miyasaka, Tokyo, JP;
Makoto Iwasaki, Tokyo, JP;
Takahiro Kawashima, Tokyo, JP;
Chikara Ishizaka, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
An R-T-B based sintered magnet includes a first main surface and a first side surface. The first main surface has a coercivity that is higher than that of the first side surface. ΔHcj≤60 kA/m is satisfied, where ΔHcjis a difference in coercivity between a portion having a highest coercivity on the first main surface and a portion having a lowest coercivity on the first main surface. ΔHcj≤60 kA/m is satisfied, where ΔHcjis a difference in coercivity between a portion having a highest coercivity on a first cross section and a portion having a lowest coercivity on the first cross section and the first cross section is a cross section parallel to the first main surface and spaced from the first main surface at a predetermined length or more.