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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.:

US 10984941 B1

PDFFull Text
Date of Patent:
Apr. 20, 2021

Filed:

May. 01, 2018

Inductor element

Applicant:

Tdk Corporation, Tokyo, JP;

Inventors:

Yasuhide Yamashita, Tokyo, JP;

Katsushi Yasuhara, Tokyo, JP;

Chiomi Sato, Tokyo, JP;

Syota Goto, Tokyo, JP;

Assignee:

TDK CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Elvin G Enad

Assistant Examiner:

Malcolm Barnes

Int. Cl.
CPC ...
H01F 27/255 (2006.01); H01F 17/00 (2006.01); B29C 43/18 (2006.01); H01F 27/02 (2006.01); H01F 41/04 (2006.01); B29C 43/14 (2006.01); H01F 17/04 (2006.01); H01F 1/36 (2006.01); B29L 31/34 (2006.01); B29K 705/00 (2006.01);
U.S. Cl.
CPC ...
H01F 27/255 (2013.01); B29C 43/14 (2013.01); B29C 43/18 (2013.01); H01F 17/04 (2013.01); H01F 27/02 (2013.01); H01F 41/04 (2013.01); B29C 2043/182 (2013.01); B29K 2705/00 (2013.01); B29K 2995/0008 (2013.01); B29L 2031/34 (2013.01); H01F 1/36 (2013.01); H01F 17/043 (2013.01); H01F 2017/046 (2013.01); H01F 2017/048 (2013.01);
Abstract

An inductor element includes a wire-winding portion and a core portion. In the wire-winding portion, a conductor is wound in a coil shape. The core portion surrounds the wire-winding portion and contains a magnetic powder and a resin. An inner-core central region is a region of the core portion within a distance from a winding axis center of the wire-winding portion toward an existing region of the wire-winding portion in an outward direction perpendicular to the winding axis center. A top-plate central region is a region of the core portion within a distance from the winding axis center toward a no-existing region of the wire-winding portion in the outward direction. Sα−Sβ≥−2% is satisfied, where Sα (%) and Sβ (%) are respectively an area ratio of the magnetic powder in the inner-core central region and the top-plate central region.

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