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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 10236110 B1

PDFFull Text
Date of Patent:
Mar. 19, 2019

Filed:

Mar. 13, 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 27/25 (2006.01); H01F 27/255 (2006.01); C22C 38/00 (2006.01); H01F 3/08 (2006.01); H01F 41/02 (2006.01); H01F 1/26 (2006.01); H01F 1/33 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/18 (2006.01); C22C 33/02 (2006.01); B22F 3/02 (2006.01); B22F 3/24 (2006.01); C21D 8/12 (2006.01); C21D 9/40 (2006.01); C22C 38/28 (2006.01); H01F 1/147 (2006.01); H01F 1/20 (2006.01); H01F 1/24 (2006.01); C21D 6/00 (2006.01); C21D 1/26 (2006.01);
U.S. Cl.
CPC ...
H01F 27/255 (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 38/005 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/18 (2013.01); C22C 38/28 (2013.01); H01F 1/14791 (2013.01); H01F 1/20 (2013.01); H01F 1/26 (2013.01); H01F 1/33 (2013.01); H01F 3/08 (2013.01); H01F 41/0246 (2013.01); B22F 2003/248 (2013.01); B22F 2998/10 (2013.01); C21D 1/26 (2013.01); C21D 6/002 (2013.01); H01F 1/24 (2013.01);
Abstract

A magnetic core includes alloy phaseseach made of Fe-based soft magnetic alloy grains including M1 (wherein M1 represents both elements of Al and Cr), Si, and R (wherein R represents at least one element selected from the group consisting of Y, Zr, Nb, La, Hf and Ta), and has a structure in which the alloy phasesare connected to each other through a grain boundary phase. In the grain boundary phase, an oxide region is produced. The oxide region includes Fe, M1, Si and R and further includes Al in a larger proportion by mass than the alloy phases

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