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:
Aug. 23, 2022
Filed:
Mar. 21, 2019
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Kyohei Takahashi, Tokyo, JP;
Isao Kanada, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/26 (2006.01); H01F 1/33 (2006.01); H01F 1/34 (2006.01); H01F 1/147 (2006.01); B22F 1/102 (2022.01); B22F 3/11 (2006.01); C22C 38/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/26 (2013.01); B22F 1/102 (2022.01); B22F 3/11 (2013.01); C22C 38/00 (2013.01); H01F 1/147 (2013.01); H01F 1/33 (2013.01); H01F 1/34 (2013.01); C22C 2202/02 (2013.01); Y10T 428/32 (2015.01);
Abstract
The present invention provides a composite magnetic body comprising metal particles containing Fe or Fe and Co as a main component, a resin, and voids, wherein an average major axis diameter of the metal particles is 30 to 500 nm, an average aspect ratio of the metal particles is 1.5 to 10, and in a cross section of the composite magnetic body, a percent presence of the voids is 0.2 to 10 area % and an average equivalent circle diameter of the voids is 1 μm or less, and a saturation magnetization of the composite magnetic body is 300 to 600 emu/cm.