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. 09, 2024
Filed:
Jun. 14, 2018
Applicant:
Taiyo Yuden Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
TAIYO YUDEN CO., LTD, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 1/33 (2006.01); H01F 1/38 (2006.01); H01F 1/34 (2006.01); H01F 3/02 (2006.01); H01F 3/08 (2006.01); B22F 1/16 (2022.01); B22F 5/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/33 (2013.01); B22F 1/16 (2022.01); H01F 1/342 (2013.01); H01F 1/38 (2013.01); H01F 3/02 (2013.01); H01F 3/08 (2013.01); B22F 5/00 (2013.01); B22F 2207/07 (2013.01); B22F 2301/35 (2013.01); B22F 2302/256 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); C22C 2202/02 (2013.01);
Abstract
A magnetic material includes a soft magnetic metal grain containing Fe, and a multilayer oxide film covering the surfaces of the soft magnetic metal grain. The multilayer oxide film has a first oxide layer of crystalline nature containing Fe, and a second oxide layer of amorphous nature containing Si. In an embodiment, the silicon oxide film of amorphous nature is formed by dripping, divided into multiple sessions, a treatment solution containing TEOS (tetraethoxy silane), ethanol, and water into a mixed solution containing the soft magnetic metal grain, ethanol, and ammonia water, to mix the solutions.