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. 24, 2021
Filed:
Oct. 24, 2016
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Sintered Alloy, Ltd., Takahashi, JP;
Tatsuya Saito, Itami, JP;
Hijiri Tsuruta, Itami, JP;
Asako Watanabe, Itami, JP;
Tomoyuki Ueno, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Sintered Alloy, Ltd., Takahashi, JP;
Abstract
A compact is provided. When the compact is used for a magnetic core, a magnetic path cross section has a cross-sectional perimeter of more than 20 mm, and at least part of a surface of the compact is covered with an iron-based oxide film having an average thickness of 0.5 μm or more and 10.0 μm or less. Letting the proportion of the surface area of the compact to the volume of the compact be surface area/volume, the content of FeOpresent in the iron-based oxide film with respect to 100% by volume of the compact satisfies any one of (1) to (3): (1) less than 0.085% by volume when the (surface area/volume) is 0.40 mmor less, (2) 0.12% or less by volume when the (surface area/volume) is more than 0.40 mmand 0.60 mmor less, and (3) 0.15% or less by volume when the (surface area/volume) is more than 0.60 mm.