公开(公告)号：US20180204661A1

公开(公告)日：2018-07-19

申请号：US15848567

申请日：2017-12-20

Applicant: TDK CORPORATION

Inventor： Yasuhide YAMASHITA ,  Katsushi YASUHARA ,  Chiomi SATO

IPC: H01F27/255 ,  B29C43/18 ,  H01F27/02 ,  H01F41/04

CPC classification number: H01F27/255 ,  B29C43/14 ,  B29C43/18 ,  B29C2043/182 ,  B29K2101/10 ,  B29K2505/00 ,  B29K2705/00 ,  B29K2995/0008 ,  H01F1/36 ,  H01F3/08 ,  H01F3/14 ,  H01F17/043 ,  H01F27/02 ,  H01F41/0246 ,  H01F41/04 ,  H01F2017/046 ,  H01F2017/048

Abstract: A method of manufacturing an inductor element includes preparing an insert member including a winding portion where a conductor is wound in a coil shape. A plurality of preliminary green compacts is obtained by conducting a preliminary compression molding of a granule containing a magnetic powder and a resin at a pressure of 2.5×102 to 1×103 MPa. The insert member and the plurality of preliminary green compacts are integrated so that a joint interface of the plurality of preliminary green compacts is formed intermittently.

公开(公告)号：US20250111983A1

公开(公告)日：2025-04-03

申请号：US18899839

申请日：2024-09-27

Applicant: TDK CORPORATION

Inventor： Yusuke TANIGUCHI ,  Chiomi SATO

IPC: H01F27/28 ,  H01F27/255

Abstract: A coil component may include a core portion including soft magnetic metal particles and a resin and a winding portion including a conductor wound. The winding portion may be inside the core portion. The core portion may include an axially central region and a coil corner neighboring region. The soft magnetic metal particles may include specific particles having a particle size of 10 μm or more and 50 μm or less. 0

公开(公告)号：US20180322997A1

公开(公告)日：2018-11-08

申请号：US15967769

申请日：2018-05-01

Applicant: TDK CORPORATION

Inventor： Yasuhide YAMASHITA ,  Katsushi YASUHARA ,  Chiomi SATO

IPC: H01F27/255 ,  H01F27/28

CPC classification number: H01F27/255 ,  H01F27/02 ,  H01F27/2823

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.

公开(公告)号：US20180294084A1

公开(公告)日：2018-10-11

申请号：US15915901

申请日：2018-03-08

Applicant: TDK CORPORATION

Inventor： Masahiro KAMIYA ,  Yasuhide YAMASHITA ,  Chiomi SATO ,  Yousuke FUTAMATA ,  Ryoma NAKAZAWA ,  Takeshi TAKAHASHI ,  Hiroyuki ONO

IPC: H01F1/24 ,  H01F1/33 ,  H01F3/08 ,  B22F1/02 ,  H01F41/02 ,  C22C38/02

Abstract: A dust core includes a metal magnetic material, a resin, and an insulation film. The insulation film contacts with a surface of the metal magnetic material and covers the metal magnetic material. The insulation film includes a first film and a second film. The first film contacts with the surface of the metal magnetic material. The second film contacts with a surface of the first film. A density of the first film is higher than a density of the second film.

公开(公告)号：US20200328021A1

公开(公告)日：2020-10-15

申请号：US16841951

申请日：2020-04-07

Applicant: TDK CORPORATION

Inventor： Yasuhide YAMASHITA ,  Chiomi SATO

IPC: H01F27/255 ,  B29C43/18 ,  H01F27/02 ,  H01F41/04 ,  H01F17/04 ,  H01F3/08

Abstract: The present invention is an inductor element having a conductor wound in a coil form, and a core part surrounding the coil and including a magnetic powder and a resin. The core part includes a top board part and a bottom board part respectively covering both ends of the coil, and an outer circumference part positioned at an outer circumference side of the coil, and a resin content of the outer circumference part is larger than a resin content of the top board part and also larger than a resin content of the bottom board part.

公开(公告)号：US20180322998A1

公开(公告)日：2018-11-08

申请号：US15968036

申请日：2018-05-01

Applicant: TDK CORPORATION

Inventor： Yasuhide YAMASHITA ,  Katsushi YASUHARA ,  Chiomi SATO ,  Syota GOTO

IPC: H01F27/255 ,  B29C43/18 ,  H01F27/02 ,  H01F41/04

CPC classification number: H01F27/255 ,  B29C43/18 ,  H01F1/36 ,  H01F27/02 ,  H01F41/04 ,  H01F2017/046 ,  H01F2017/048

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.