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:
Aug. 09, 2022
Filed:
Jan. 23, 2020
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/34 (2006.01); C04B 35/26 (2006.01); H01F 17/00 (2006.01); H01F 27/255 (2006.01);
U.S. Cl.
CPC ...
H01F 1/346 (2013.01); C04B 35/265 (2013.01); H01F 1/344 (2013.01); H01F 17/0013 (2013.01); H01F 27/255 (2013.01); C04B 2235/3274 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/3427 (2013.01); C04B 2235/763 (2013.01); C04B 2235/80 (2013.01); C04B 2235/83 (2013.01); C04B 2235/85 (2013.01);
Abstract
A ferrite composition includes main-phase particles, first sub-phase particles, second sub-phase particles, and a grain boundary. At least 10% or more of the main-phase particles contain a portion whose Zn concentrations monotonously decrease from a particle surface toward a particle central part along a length of 50 nm or more. The first sub-phase particles contain ZnSiO. The second sub-phase particles contain SiO. A total area ratio of the first sub-phase particles and the second sub-phase particles is 30.5% or more.