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:
Jan. 03, 2023
Filed:
Sep. 01, 2017
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 1/24 (2006.01); H01F 3/08 (2006.01); B22F 9/02 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/10 (2006.01); C22C 45/02 (2006.01); B29B 7/90 (2006.01); B29C 43/00 (2006.01); B22F 1/16 (2022.01); B29K 105/16 (2006.01); B29K 505/00 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/24 (2013.01); B22F 9/026 (2013.01); B29B 7/90 (2013.01); B29C 43/003 (2013.01); C22C 38/00 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/10 (2013.01); C22C 45/02 (2013.01); H01F 3/08 (2013.01); B22F 1/16 (2022.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); B29K 2105/16 (2013.01); B29K 2505/00 (2013.01); B29K 2995/0008 (2013.01); C22C 2202/02 (2013.01); H01F 41/0246 (2013.01);
Abstract
A dust core including a metal magnetic powder and a resin, in which the metal magnetic powder shows a particle diameter of more than 0 μm and 200 μm or less, a number percentage of 5.0% or more of metal magnetic particles among the metal magnetic particles composing the metal magnetic powder are at least partially surface-coated with an inorganic compound including an alkaline earth metal, in a coating part coating the metal magnetic particles, an amount of the alkaline earth metal is 10.0 mass % or more, when a total amount of a metal element included in the coating part is 100 mass %, is provide. The dust core is superior in a corrosion-resistance.