Invention Grant
- Patent Title: Inductor element
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Application No.: US15967769Application Date: 2018-05-01
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Publication No.: US10886056B2Publication Date: 2021-01-05
- Inventor: Yasuhide Yamashita , Katsushi Yasuhara , Chiomi Sato
- Applicant: TDK CORPORATION
- Applicant Address: JP Tokyo
- Assignee: TDK CORPORATION
- Current Assignee: TDK CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2017-091666 20170502
- Main IPC: H01F27/255
- IPC: H01F27/255 ; H01F3/08 ; H01F27/28 ; H01F3/10 ; H01F17/04 ; H01F27/02

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. The wire-winding portion includes an inner circumferential surface. A winding-wire inner circumferential neighboring region is a region of the core portion within a distance from the inner circumferential surface toward a winding axis of the wire-winding portion. An inner-core central region is a region of the core portion within a distance from the winding axis center toward an existing region of the wire-winding portion in an outward direction perpendicular to the winding axis center. Sα−Sβ1≥5.0% is satisfied, where Sα(%) and Sβ1(%) are respectively an area ratio of a magnetic powder in the inner-core central region and the winding-wire inner circumferential neighboring region.
Public/Granted literature
- US20180322997A1 INDUCTOR ELEMENT Public/Granted day:2018-11-08
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