Invention Grant
- Patent Title: Inductor element
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Application No.: US15968036Application Date: 2018-05-01
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Publication No.: US10984941B2Publication Date: 2021-04-20
- Inventor: Yasuhide Yamashita , Katsushi Yasuhara , Chiomi Sato , Syota Goto
- Applicant: TDK CORPORATION
- Applicant Address: JP Tokyo
- Assignee: TDK CORPORATION
- Current Assignee: TDK CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JPJP2017-091663 20170502
- Main IPC: H01F27/255
- IPC: H01F27/255 ; H01F17/00 ; B29C43/18 ; H01F27/02 ; H01F41/04 ; B29C43/14 ; H01F17/04 ; H01F1/36 ; B29L31/34 ; B29K705/00

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.
Public/Granted literature
- US20180322998A1 INDUCTOR ELEMENT Public/Granted day:2018-11-08
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