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:
Jun. 22, 2021
Filed:
Mar. 08, 2018
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Masahiro Kamiya, Tokyo, JP;
Yasuhide Yamashita, Tokyo, JP;
Chiomi Sato, Tokyo, JP;
Yousuke Futamata, Tokyo, JP;
Ryoma Nakazawa, Tokyo, JP;
Takeshi Takahashi, Tokyo, JP;
Hiroyuki Ono, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/24 (2006.01); H01F 1/33 (2006.01); H01F 3/08 (2006.01); B22F 1/02 (2006.01); H01F 41/02 (2006.01); C22C 38/02 (2006.01); H01F 1/26 (2006.01);
U.S. Cl.
CPC ...
H01F 1/24 (2013.01); B22F 1/02 (2013.01); B22F 1/025 (2013.01); C22C 38/02 (2013.01); H01F 1/33 (2013.01); H01F 3/08 (2013.01); H01F 41/02 (2013.01); H01F 41/0246 (2013.01); B22F 2998/10 (2013.01); C22C 2202/02 (2013.01); H01F 1/26 (2013.01);
Abstract
A dust core includes a metal magnetic material, a resin, and an insulation film. The insulation film contacts with a surface of the metal magnetic material and covers the metal magnetic material. The insulation film includes a first film and a second film. The first film contacts with the surface of the metal magnetic material. The second film contacts with a surface of the first film. A density of the first film is higher than a density of the second film.