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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.:

US 8988301 B1

PDFFull Text
Date of Patent:
Mar. 24, 2015

Filed:

Nov. 27, 2009

Core-shell magnetic material, method for producing core-shell magnetic material, device, and antenna device

Applicants:

Maki Yonetsu, Tokyo, JP;

Tomohiro Suetsuna, Kanagawa, JP;

Koichi Harada, Tokyo, JP;

Seiichi Suenaga, Kanagawa, JP;

Shinji Murai, Kanagawa, JP;

Yasuyuki Hotta, Tokyo, JP;

Toshihide Takahashi, Kanagawa, JP;

Tomoko Eguchi, Tokyo, JP;

Noritsugu Shiokawa, Kanagawa, JP;

Inventors:

Maki Yonetsu, Tokyo, JP;

Tomohiro Suetsuna, Kanagawa, JP;

Koichi Harada, Tokyo, JP;

Seiichi Suenaga, Kanagawa, JP;

Shinji Murai, Kanagawa, JP;

Yasuyuki Hotta, Tokyo, JP;

Toshihide Takahashi, Kanagawa, JP;

Tomoko Eguchi, Tokyo, JP;

Noritsugu Shiokawa, Kanagawa, JP;

Assignee:

Kabushiki Kaisha Toshiba, Tokyo, JP;

Attorney:

Amin, Turocy & Watson, LLP

Primary Examiner:

Hoang V Nguyen

Assistant Examiner:

Patrick Holecek

Int. Cl.
CPC ...
H01Q 1/00 (2006.01); H01F 1/33 (2006.01); B22F 1/00 (2006.01); B22F 1/02 (2006.01); C22C 38/06 (2006.01); C22C 38/10 (2006.01); H01F 1/24 (2006.01); H01F 1/26 (2006.01); H01F 41/02 (2006.01); H01Q 1/48 (2006.01); H01Q 9/28 (2006.01); H01Q 9/42 (2006.01); H01Q 17/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/33 (2013.01); B22F 1/0062 (2013.01); B22F 1/02 (2013.01); C22C 38/06 (2013.01); C22C 38/10 (2013.01); H01F 1/24 (2013.01); H01F 1/26 (2013.01); H01F 41/0246 (2013.01); H01Q 1/48 (2013.01); H01Q 9/28 (2013.01); H01Q 9/42 (2013.01); H01Q 17/00 (2013.01); C22C 2202/02 (2013.01);
Abstract

A core-shell magnetic material having an excellent characteristic in a high-frequency band, in particular a GHz-band and a high environment resistance is provided. The core-shell magnetic material includes: a magnetic member in which plural core-shell magnetic particles are bound by a binder made of a first resin; and a coating layer that is made of a second resin different from the first resin, a surface of the magnetic member being covered with the coating layer. The core-shell magnetic material is characterized in that the core-shell magnetic particle includes a magnetic metallic particle and a covering layer that covers at least part of a surface of the magnetic metallic particle, the magnetic metallic particle contains at least one magnetic metal selected from a group consisting of Fe, Co, and Ni, and the covering layer is made of an oxide, a nitride, or a carbide that contains at least one magnetic metal.

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