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:
Oct. 16, 2012
Filed:
Mar. 25, 2009
Tomohiro Suetsuna, Kanagawa, JP;
Kouichi Harada, Tokyo, JP;
Maki Yonetsu, Tokyo, JP;
Seiichi Suenaga, Kanagawa, JP;
Naoto Ito, Tokyo, JP;
Akihiro Tsujimura, Tokyo, JP;
Tomohiro Suetsuna, Kanagawa, JP;
Kouichi Harada, Tokyo, JP;
Maki Yonetsu, Tokyo, JP;
Seiichi Suenaga, Kanagawa, JP;
Naoto Ito, Tokyo, JP;
Akihiro Tsujimura, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
The present invention provides a core-shell magnetic material having an excellent characteristic in a high frequency band, particularly, in a GHz band. The core-shell magnetic material includes: core-shell magnetic particles including magnetic metal particles and an oxide coating layer, the magnetic metal particle containing magnetic metal selected from the group of Fe, Co, and Ni, nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and an element selected from carbon and nitrogen, and the oxide coating layer being made of an oxide containing at least one nonmagnetic metal as one of the components of the magnetic metal particle; and oxide particles existing at least a part between the magnetic metal particles and containing nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and in which nonmagnetic metal/magnetic metal (atomic ratio) in the particles is higher than that in the oxide coating layer.