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. 07, 2010
Filed:
Mar. 23, 2005
Shunji Suzuki, Shizuoka, JP;
Kenichi Machida, Osaka, JP;
Eiji Sakaguchi, Kyoto, JP;
Kazuya Nakamura, Saitama, JP;
Shunji Suzuki, Shizuoka, JP;
Kenichi Machida, Osaka, JP;
Eiji Sakaguchi, Kyoto, JP;
Kazuya Nakamura, Saitama, JP;
Japan Science and Technology Agency, Saitama, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Namiki Precision Jewel Co., Ltd., Tokyo, JP;
Abstract
An R—Fe—B based thin film magnet including an R—Fe—B based alloy which contains 28 to 45 percent by mass of R element (where R represents at least one type of rare-earth lanthanide elements) and which is physically formed into a film, wherein the R—Fe—B based alloy has a composite texture composed of RFeB crystals having a crystal grain diameter of 0.5 to 30 μm and R-element-rich grain boundary phases present at boundaries between the crystals. The magnetization characteristics of the thin film magnet are improved. The R—Fe—B based thin film magnet can be prepared by heating to 700° C. to 1,200° C. during physical film formation or/and the following heat treatment, so as to grow crystal grains and form R-element-rich grain boundary phases.