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:
Nov. 10, 2015
Filed:
Sep. 21, 2011
Applicants:
Takeshi Takahashi, Tokyo, JP;
Seigo Tokoro, Tokyo, JP;
Inventors:
Takeshi Takahashi, Tokyo, JP;
Seigo Tokoro, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/16 (2006.01); B32B 7/02 (2006.01); B22F 1/02 (2006.01); H01F 1/24 (2006.01); H01F 1/33 (2006.01);
U.S. Cl.
CPC ...
B22F 1/02 (2013.01); H01F 1/24 (2013.01); H01F 1/33 (2013.01); B22F 2999/00 (2013.01); C22C 2202/02 (2013.01); Y10T 428/265 (2015.01); Y10T 428/2991 (2015.01);
Abstract
A powder magnetic core having a high electrical resistivity and a high magnetic flux density, including at least a composite magnetic particle the composite magnetic particle including: a core particle containing iron as the main component; and an insulating passivation layer formed on the core particle, wherein: the insulating passivation layer at least has an inner layer formed on the core particle and the outermost layer formed on the inner layer; and the outermost layer contains iron oxide as the main component.