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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 10176912 B1

PDFFull Text
Date of Patent:
Jan. 08, 2019

Filed:

Mar. 10, 2015

Magnetic core, coil component and magnetic core manufacturing method

Applicant:

Hitachi Metals, Ltd., Tokyo, JP;

Inventors:

Kazunori Nishimura, Mishima-gun, JP;

Toshio Mihara, Mishima-gun, JP;

Shin Noguchi, Mishima-gun, JP;

Assignee:

HITACHI METALS, LTD., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Kevin M Bernatz

Int. Cl.
CPC ...
H01F 1/147 (2006.01); C22C 38/00 (2006.01); H01F 1/24 (2006.01); H01F 3/08 (2006.01); H01F 41/02 (2006.01); H01F 1/33 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/18 (2006.01); C22C 33/02 (2006.01); B22F 1/00 (2006.01); B22F 3/02 (2006.01); B22F 3/24 (2006.01); C21D 8/12 (2006.01); C21D 9/40 (2006.01); C22C 38/34 (2006.01); H01F 1/22 (2006.01); H01F 27/255 (2006.01); H01F 1/26 (2006.01); C21D 6/00 (2006.01); C21D 1/26 (2006.01);
U.S. Cl.
CPC ...
H01F 1/14791 (2013.01); B22F 1/0059 (2013.01); B22F 3/02 (2013.01); B22F 3/24 (2013.01); C21D 8/1216 (2013.01); C21D 9/40 (2013.01); C22C 33/0257 (2013.01); C22C 38/00 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/18 (2013.01); C22C 38/34 (2013.01); H01F 1/22 (2013.01); H01F 1/24 (2013.01); H01F 1/33 (2013.01); H01F 3/08 (2013.01); H01F 27/255 (2013.01); H01F 41/0246 (2013.01); B22F 2003/248 (2013.01); B22F 2201/03 (2013.01); B22F 2302/45 (2013.01); B22F 2998/10 (2013.01); C21D 1/26 (2013.01); C21D 6/002 (2013.01); H01F 1/26 (2013.01);
Abstract

A magnetic core has a structure in which alloy phaseseach including Fe, Al, Cr and Si are dispersed and any adjacent two of the alloy phasesare connected to each other through a grain boundary phase. In this grain boundary phase, an oxide region is produced which includes Fe, Al, Cr and Si, and includes Al in a larger proportion by mass than the alloy phases. This magnetic core includes Al in a proportion of 3 to 10% both inclusive by mass, Cr in a proportion of 3 to 10% both inclusive by mass, and Si in a proportion more than 1% and 4% or less by mass provided that the sum of the quantities of Fe, Al, Cr and Si is regarded as being 100% by mass; and includes Fe and inevitable impurities as the balance of the core.

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