公开(公告)号：US20220115177A1

公开(公告)日：2022-04-14

申请号：US17499269

申请日：2021-10-12

Applicant: TDK CORPORATION

Inventor： Toru TONOGAI ,  Kyosuke INUI ,  Yuichi OYANAGI ,  Izuru KIMURA

IPC: H01F27/28 ,  H01F27/255

Abstract: An element body includes a metal-particle-dispersed body in which metal particles are dispersed, the metal-particle-dispersed body includes a display region on a surface, and the display region includes a display pattern in which a resin exposed portion where a resin appears on a surface and a metal exposed portion where the metal particles appear on the surface are alternately repeated.

公开(公告)号：US20240331923A1

公开(公告)日：2024-10-03

申请号：US18616818

申请日：2024-03-26

Applicant: TDK CORPORATION

Inventor： Hirofumi SASAKI ,  Koji SHIMURA ,  Kyosuke INUI

IPC: H01F27/28

CPC classification number: H01F27/2823

Abstract: A coil device comprises a first magnetic material portion containing a magnetic material and having a plate-shaped portion and a protrusion, a metal wire having a winding portion including two or more layers of winding layers wound around the protrusion; and a second magnetic material portion containing a magnetic material and a resin, having a content ratio of the magnetic material smaller than that of the first magnetic material portion, and covering at least an outer peripheral side of the winding portion, wherein a set of wire cross sections is deformed with respect to a perfect circle such that a center-to-center distance of at least one set of adjacent wire cross sections is shorter than in case that the set of wire cross sections is a perfect circle, viewed in a predetermined cross section including a winding axis of the winding portion.

公开(公告)号：US20240331919A1

公开(公告)日：2024-10-03

申请号：US18616735

申请日：2024-03-26

Applicant: TDK CORPORATION

Inventor： Hirofumi SASAKI ,  Koji SHIMURA ,  Kyosuke INUI

IPC: H01F27/255 ,  H01F27/28

CPC classification number: H01F27/255 ,  H01F27/2823

Abstract: A coil device comprises a first magnetic material portion containing a magnetic material and having a plate-shaped portion and a protrusion protruding, a metal wire having a winding portion including two or more layers of winding layers, and a second magnetic material portion containing a magnetic material and a resin, having a content ratio of the magnetic material smaller than that of the first magnetic material portion, and covering at least an outer peripheral side of the winding portion, wherein inter-wire spaces defined by circumscribed circles circumscribing three different wire cross sections and having a diameter smaller than a radius of each wire cross section are formed, and first inter-wire spaces not including a magnetic material and second inter-wire spaces including a magnetic material are included in the inter-wire spaces.

公开(公告)号：US20220344086A1

公开(公告)日：2022-10-27

申请号：US17723808

申请日：2022-04-19

Applicant: TDK CORPORATION

Inventor： Kyosuke INUI ,  Terumasa TOYODA ,  Toru TONOGAI ,  Yuichi OYANAGI

IPC: H01F1/24

Abstract: An element body 4 includes a metal particle dispersion element 15 in which metal particles 12 are dispersed. A surface of the metal particle dispersion element 15 includes an indicator area 10. The indicator area 10 includes a recess 10a having a predetermined depth measured from a reference plane L of the metal particle dispersion element 15. The predetermined depth D1 is deeper than D50 of the metal particles 12 included in the metal particle dispersion element 15.

公开(公告)号：US20230402222A1

公开(公告)日：2023-12-14

申请号：US18328521

申请日：2023-06-02

Applicant: TDK CORPORATION

Inventor： Kyosuke INUI

IPC: H01F27/29 ,  H01F27/28

CPC classification number: H01F27/292 ,  H01F27/2828

Abstract: A coil device includes a core, a coil, and an electrode. The coil includes a winding portion disposed inside the core and a lead portion leading from the winding portion. The electrode is formed on an electrode formation surface of the core. The lead portion includes a terminal portion extending to the electrode formation surface. The terminal portion includes an embedded portion embedded inside the core and an exposed portion exposed from the electrode formation surface and connected to the electrode. The exposed portion includes a bent portion.

公开(公告)号：US20220139609A1

公开(公告)日：2022-05-05

申请号：US17512790

申请日：2021-10-28

Applicant: TDK CORPORATION

Inventor： Kyosuke INUI ,  Yuichi OYANAGI ,  Toru TONOGAI ,  Toshiyuki ANBO

IPC: H01F27/29 ,  H01F17/04

Abstract: A coil device including: a core containing magnetic particles and a resin component; a coil including a conductor having a coil shape; and a terminal electrode formed on a part of an outer surface of the core and electrically connected to an end of the conductor drawn from the coil. The terminal electrode includes a first electrode layer in contact with the end of the conductor and a second electrode layer located outside the first electrode layer. The first electrode layer and the second electrode layer both include conductive powder and resin, and a content of the resin in the second electrode layer is higher than a content of the resin in the first electrode layer.

公开(公告)号：US20210358683A1

公开(公告)日：2021-11-18

申请号：US17320402

申请日：2021-05-14

Applicant: TDK CORPORATION

Inventor： Kyosuke INUI ,  Makoto MORITA ,  Takashi KUDO ,  Toshiyuki ANBO ,  Kyohei TONOYAMA ,  Fuyuki MIURA ,  Masanori SUGAI ,  Eietsu ABE ,  Toru TONOGAI ,  Yuichi OYANAGI

IPC: H01F27/29 ,  H01F27/28

Abstract: An electronic component according to the present invention includes: a leadout electrode portion provided on an outer surface of an element main body; and a resin electrode layer formed at a part of the outer surface of the element main body and connected to the leadout electrode portion. The leadout electrode portion contains copper as a main component, and the resin electrode layer includes a conductor powder containing silver, and a resin. Further, a diffusion layer containing copper oxide and silver is formed at an interface between the leadout electrode portion and the resin electrode layer.