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:
Feb. 28, 2012
Filed:
Sep. 03, 2008
Tomoyuki Ishimine, Itami, JP;
Toshihiro Sakamoto, Itami, JP;
Toru Maeda, Itami, JP;
Naoto Igarashi, Itami, JP;
Tomoyuki Ishimine, Itami, JP;
Toshihiro Sakamoto, Itami, JP;
Toru Maeda, Itami, JP;
Naoto Igarashi, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka-Shi, JP;
Abstract
A soft magnetic material, a dust core, a method for manufacturing the soft magnetic material, and a method for manufacturing the dust core that can improve DC bias characteristics are provided. A soft magnetic material includes a plurality of metal magnetic particleswhose coefficient of variation Cv (σ/μ), which is a ratio of a standard deviation (σ) of a particle size of the metal magnetic particlesto an average particle size (μ) thereof, is 0.40 or less and whose circularity Sf is 0.80 or more and 1 or less. The metal magnetic particlespreferably have an average particle size of 1 μm or more and 70 μm or less. The soft magnetic material preferably further includes an insulating coated film that surrounds a surface of each of the metal magnetic particles