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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 9805855 B1

PDFFull Text
Date of Patent:
Oct. 31, 2017

Filed:

Jan. 14, 2015

Magnetic core and coil component using same

Applicant:

Hitachi Metals, Ltd., Tokyo, JP;

Inventors:

Shin Noguchi, Osaka, JP;

Kazunori Nishimura, Osaka, JP;

Toshio Mihara, Osaka, JP;

Assignee:

HITACHI METALS, LTD., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Tuyen Nguyen

Int. Cl.
CPC ...
H01F 27/28 (2006.01); H01F 27/255 (2006.01); B22F 1/00 (2006.01); B22F 1/02 (2006.01); B22F 3/14 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/18 (2006.01); C22C 45/02 (2006.01); H01F 1/24 (2006.01); H01F 41/02 (2006.01); B22F 3/03 (2006.01); B22F 3/04 (2006.01); B22F 3/24 (2006.01); B22F 9/04 (2006.01); B22F 9/08 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/08 (2006.01); H01F 1/33 (2006.01);
U.S. Cl.
CPC ...
H01F 27/255 (2013.01); B22F 1/00 (2013.01); B22F 1/0062 (2013.01); B22F 1/02 (2013.01); B22F 3/03 (2013.01); B22F 3/04 (2013.01); B22F 3/14 (2013.01); B22F 3/24 (2013.01); B22F 9/04 (2013.01); B22F 9/082 (2013.01); C22C 33/02 (2013.01); C22C 33/0257 (2013.01); C22C 33/0264 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/18 (2013.01); C22C 45/02 (2013.01); H01F 1/24 (2013.01); H01F 27/28 (2013.01); H01F 27/2823 (2013.01); H01F 41/0246 (2013.01); B22F 2003/248 (2013.01); B22F 2009/0828 (2013.01); B22F 2998/10 (2013.01); H01F 1/33 (2013.01);
Abstract

A magnetic core has a structure in which Fe-based soft magnetic alloy particles are connected via a grain boundary. The Fe-based soft magnetic alloy particles contain Al, Cr and Si. An oxide layer containing at least Fe, Al, Cr and Si is formed at the grain boundary that connects the neighboring Fe-based soft magnetic alloy particles. The oxide layer contains an amount of Al larger than that in Fe-based soft magnetic alloy particles, and includes a first region in which the ratio of Al is higher than the ratio of each of Fe, Cr and Si to the sum of Fe, Cr, Al and Si, and a second region in which the ratio of Fe is higher than the ratio of each of Al, Cr and Si to the sum of Fe, Cr, Al and Si. The first region is on the Fe-based soft magnetic alloy particle side.

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