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US 2018/0294084 A1Published application
Dust core
AssigneeTDK Corporation
InventorsMasahiro KAMIYA, Yasuhide YAMASHITA, Chiomi SATO, Yousuke FUTAMATA, Ryoma NAKAZAWA, Takeshi TAKAHASHI, Hiroyuki ONO
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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.
Claims20
A dust core comprising:
- a metal magnetic material;
- a resin;
- and
- an insulation film contacting with a surface of the metal magnetic material and covering the metal magnetic material,
- wherein the insulation film comprises:
- a first film contacting with the surface of the metal magnetic material;
- and
- a second film contacting with a surface of the first film, and
- wherein a density of the first film is higher than a density of the second film.
6 more elements
Dependencies are inferred from the claim text.