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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 12776444 B1

PDFFull Text
Date of Patent:
Oct. 27, 2026

Filed:

Oct. 30, 2023

Method of manufacturing coil component

Applicant:

Taiyo Yuden Co., Ltd., Tokyo, JP;

Inventors:

Tomoya Hagiwara, Tokyo, JP;

Tatsuya Tomita, Tokyo, JP;

Takashi Nakajima, Tokyo, JP;

Assignee:

TAIYO YUDEN CO., LTD., Tokyo, JP;

Attorney:

CUSHMAN PARTNERS, LLC

Primary Examiner:

Ricardo D Morales

Int. Cl.
CPC ...
H01F 41/02 (2006.01); B22F 3/02 (2006.01); B22F 3/24 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0246 (2013.01); B22F 3/02 (2013.01); B22F 3/24 (2013.01); B22F 2003/248 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01);
Abstract

One object is to manufacture a magnetic base body containing soft magnetic metal particles with a high content percentage of Fe. A manufacturing method of a magnetic base body according to one embodiment includes: producing a molded body containing a plurality of soft magnetic metal particles at a filling factor of 85% or higher, each of the plurality of soft magnetic metal particles containing Fe and an element A more apt to oxidation than Fe; and heating the molded body to form an insulating film on a surface of each of the plurality of soft magnetic metal particles, the insulating film containing an oxide of Fe and an oxide of the element A. A content percentage of Fe in the plurality of soft magnetic metal particles after the heating is higher than a content percentage of Fe in the plurality of soft magnetic metal particles before the heating.

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Hagiwara, Tomoya. (2026). Method of manufacturing coil component (U.S. Patent No. 12776444). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12776444

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