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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 10586646 B1

PDFFull Text
Date of Patent:
Mar. 10, 2020

Filed:

Sep. 15, 2017

Magnetic core and coil component

Applicant:

Hitachi Metals, Ltd., Tokyo, JP;

Inventors:

Toshio Mihara, Minato-ku, JP;

Tetsuroh Katoh, Minato-ku, JP;

Kazunori Nishimura, Minato-ku, JP;

Shin Noguchi, Minato-ku, JP;

Assignee:

HITACHI METALS, LTD., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Tuyen T Nguyen

Int. Cl.
CPC ...
H01F 27/29 (2006.01); H01F 27/24 (2006.01); H01F 1/055 (2006.01); H01F 27/28 (2006.01); H01F 1/33 (2006.01); B22F 1/00 (2006.01); H01F 37/00 (2006.01); H01F 27/255 (2006.01); B22F 1/02 (2006.01); C22C 38/00 (2006.01); H01F 1/24 (2006.01); H01F 1/147 (2006.01); B22F 3/00 (2006.01);
U.S. Cl.
CPC ...
H01F 27/24 (2013.01); B22F 1/00 (2013.01); B22F 1/02 (2013.01); C22C 38/00 (2013.01); H01F 1/0551 (2013.01); H01F 1/147 (2013.01); H01F 1/24 (2013.01); H01F 1/33 (2013.01); H01F 27/255 (2013.01); H01F 27/2823 (2013.01); H01F 27/29 (2013.01); H01F 37/00 (2013.01); B22F 3/00 (2013.01);
Abstract

A magnetic core has a high initial permeability and a small core loss, reducing a core loss at high frequencies; and a coil component including the same. This magnetic core is formed by binding a plurality of Fe-based alloy particles containing Al via an oxide layer containing an Fe oxide. In an X-ray diffraction spectrum of the magnetic core measured using Cu-Kα characteristic X-rays, a peak intensity ratio (P1/P2) of peak intensity P1 of a diffraction peak derived from the Fe oxide having a corundum structure appearing in the vicinity of 2θ=33.2° to peak intensity P2 of a diffraction peak derived from the Fe-based alloy having a bcc structure appearing in the vicinity of 2θ=44.7° is 0.010 or less (excluding 0). A superlattice peak intensity of an FeAl ordered structure is at most a noise level within a range of 2θ=20° to 40°.

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