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.:
Date of Patent:
Nov. 21, 2023
Filed:
Jul. 08, 2021
Metal magnetic powder and method for manufacturing same, as well as coil component and circuit board
Applicant:
Taiyo Yuden Co., Ltd., Tokyo, JP;
Inventor:
Yoko Orimo, Takasaki, JP;
Assignee:
TAIYO YUDEN CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/147 (2006.01); H01F 27/255 (2006.01); C22C 38/34 (2006.01); B22F 1/142 (2022.01); B22F 1/06 (2022.01); B22F 1/16 (2022.01);
U.S. Cl.
CPC ...
H01F 1/147 (2013.01); B22F 1/06 (2022.01); B22F 1/142 (2022.01); C22C 38/34 (2013.01); H01F 27/255 (2013.01); B22F 2301/35 (2013.01); B22F 2302/25 (2013.01); C22C 2202/02 (2013.01); Y10T 428/32 (2015.01);
Abstract
A metal magnetic powder is constituted by metal magnetic grains that each include: a metal phase where the percentage of Fe at its center part is 98 percent by mass or higher, while the mass percentage of Fe at its contour part is lower than that at the center part; and an oxide film covering the metal phase, so as to inhibit oxidation of Fe contained in the metal phase, despite the high content percentage of Fe in the metal phase.