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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 11017925 B1

PDFFull Text
Date of Patent:
May. 25, 2021

Filed:

Apr. 10, 2018

Soft magnetic powder, powder magnetic core, magnetic element, and electronic device

Applicant:

Seiko Epson Corporation, Tokyo, JP;

Inventor:

Yasuko Kudo, Hachinohe, JP;

Assignee:

Seiko Epson Corporation;

Attorney:

Harness, Dickey & Pierce, P.L.C.

Primary Examiner:

Xiaowei Su

Int. Cl.
CPC ...
H01F 1/153 (2006.01); H01F 27/255 (2006.01); C22C 45/02 (2006.01); B22F 5/10 (2006.01); C22C 38/16 (2006.01); H01F 3/08 (2006.01); C22C 38/14 (2006.01); C22C 38/12 (2006.01); C22C 38/02 (2006.01); H01F 17/06 (2006.01); C22C 38/00 (2006.01); H01F 41/02 (2006.01); H01F 27/28 (2006.01); C22C 33/02 (2006.01); B22F 1/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/15333 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 45/02 (2013.01); H01F 1/15308 (2013.01); H01F 1/15375 (2013.01); H01F 3/08 (2013.01); H01F 17/062 (2013.01); H01F 27/255 (2013.01); B22F 1/0044 (2013.01); B22F 1/0059 (2013.01); B22F 5/106 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); C22C 33/0257 (2013.01); C22C 2200/02 (2013.01); C22C 2202/02 (2013.01); H01F 27/28 (2013.01); H01F 41/0246 (2013.01);
Abstract

A soft magnetic powder has a composition represented by FeCuSiBMM'X(at %) (wherein M is at least one element selected from the group consisting of Nb and the like, M′ is at least one element selected from the group consisting of V and the like, X is at least one element selected from the group consisting of C and the like, and 0.1≤a≤3, 0<b≤30, 0<c≤25, 5≤b+c≤30, 0.1≤d≤30, 0≤e≤10, and 0≤f≤10). The powder contains a crystalline structure having a particle diameter of 1 nm or more and 30 nm or less in an amount of 40 vol % or more. When the apparent density is assumed to be 100, the tap density is 103 or more and 130 or less.

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