公开(公告)号：US20190027287A1

公开(公告)日：2019-01-24

申请号：US16033521

申请日：2018-07-12

Applicant: TDK CORPORATION

Inventor： Takashi KUDO ,  Makoto MORITA ,  Fuyuki MIURA

IPC: H01F5/04 ,  H01F27/28 ,  H01F27/29 ,  H01F27/30

Abstract: A coil device includes a coil portion, an element body, and a terminal electrode. The coil portion is formed by a wire wound in a coil shape. The element body contains the coil portion where a part of an outer circumference of a lead-out part of the coil portion is exposed as an exposed portion from a bottom surface of the element body and where the rest of the outer circumference of the lead-out part of the coil portion is embedded as an embedded portion in the element body. The terminal electrode is formed on the bottom surface of the element body and connected with the exposed portion. An embedded length of the outer circumference of the lead-out part in the embedded portion is larger than a substantially half of a full length of the outer circumference of the lead-out part.

公开(公告)号：US20220399157A1

公开(公告)日：2022-12-15

申请号：US17375740

申请日：2021-07-14

Applicant: TDK CORPORATION

Inventor： Kazunori ARIMITSU ,  Nobuo KITAJIMA ,  Fuyuki MIURA ,  Takehiko NARISAWA ,  Kiichi FUJISAWA

IPC: H01F27/29 ,  H01F27/28

Abstract: A highly reliable coil device is provided. An inductor 1 includes a coil 2 formed of a flat wire, a first terminal 4a including a first wire connecting portion 42a formed with a first accommodation recessed portion 421a in which a first lead-out portion 3a of the coil 2 is accommodated, and a second terminal 4b including a second wire connecting portion 42b formed with a second accommodation recessed portion 421b in which a second lead-out portion 3b of the coil 2 is accommodated, in which the first accommodation recessed portion 421a and the second accommodation recessed portion 421b are displaced from each other along a winding axis direction of the coil 2.

公开(公告)号：US20240282510A1

公开(公告)日：2024-08-22

申请号：US18583170

申请日：2024-02-21

Applicant: TDK CORPORATION

Inventor： Kazunori ARIMITSU ,  Kiichi FUJISAWA ,  Masashi HAMA ,  Nobuo KITAJIMA ,  Fuyuki MIURA ,  Takehiko NARISAWA ,  Masanori SATO

IPC: H01F27/29 ,  H01F27/28

CPC classification number: H01F27/292 ,  H01F27/2828

Abstract: A coil device has a wound portion, a leadout portion led out from the wound portion, a terminal including a wire connecting portion connected to the leadout portion, and an element body covering the wound portion, the leadout portion and the wire connecting portion. A winding axis of the wound portion is perpendicular to a mounting facing surface of the element body. The leadout portion has a bent portion bent so as to protrude inward when viewed along the winding axis, and an inner angle of the bent portion is an obtuse angle.

公开(公告)号：US20230162906A1

公开(公告)日：2023-05-25

申请号：US17984020

申请日：2022-11-09

Applicant: TDK CORPORATION

Inventor： Kazunori ARIMITSU ,  Nobuo KITAJIMA ,  Kiichi FUJISAWA ,  Fuyuki MIURA ,  Takehiko NARISAWA ,  Makoto TAKAHASHI

IPC: H01F27/29

CPC classification number: H01F27/29

Abstract: An inductor 1 includes a coil 2 made of a flat wire, a terminal 4a including a wire connecting portion 42a connected to a lead portion 3a of the coil 2, a terminal 4b including a wire connecting portion 42b connected to a lead portion 3b of the coil 2, and a core 8 that covers the coil 2 together with the wire connecting portion 42a and the wire connecting portion 42b. The wire connecting portion 42a is positioned outside the lead portion 3a that is led out in a front-rear direction of the core 8, along a left-right direction of the core 8. The wire connecting portion 42b is positioned outside the lead portion 3b that is led out in the front-rear direction of the core 8, along the left-right direction of the core 8.

公开(公告)号：US20240282516A1

公开(公告)日：2024-08-22

申请号：US18441263

申请日：2024-02-14

Applicant: TDK CORPORATION

Inventor： Hirofumi SASAKI ,  Keigo HIGASHIDA ,  Fuyuki MIURA ,  Ryosuke IINUMA

IPC: H01F41/082 ,  H01F5/02 ,  H01F27/28 ,  H01F41/076

CPC classification number: H01F41/082 ,  H01F5/02 ,  H01F27/2828 ,  H01F41/076

Abstract: A coil device includes a winding portion having a wire spirally wound. The winding portion has at least one boundary region. The at least one boundary region divides the winding portion into divided sections along a winding axis of the winding portion.

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.

公开(公告)号：US20240282507A1

公开(公告)日：2024-08-22

申请号：US18441214

申请日：2024-02-14

Applicant: TDK CORPORATION

Inventor： Hirofumi SASAKI ,  Fuyuki MIURA ,  Ryosuke IINUMA

IPC: H01F27/28 ,  H01F27/02 ,  H01F27/255

CPC classification number: H01F27/28 ,  H01F27/255 ,  H01F27/02

Abstract: A coil device includes: a conductor including a winding portion and a leadout portion led out from the winding portion; a first core including a center core portion disposed inside the winding portion in a radial direction and a side wall portion surrounding the winding portion; and a plate-shaped second core attached to one end of the side wall portion in an axial direction. The side wall portion has a cutout portion formed at the one end of the side wall portion in the axial direction to pass the leadout portion. The cutout portion is cut toward another end of the side wall portion in the axial direction. At least a part of the leadout portion is exposed to an outside through the cutout portion.

公开(公告)号：US20180226184A1

公开(公告)日：2018-08-09

申请号：US15886485

申请日：2018-02-01

Applicant: TDK CORPORATION

Inventor： Takashi KUDO ,  Makoto MORITA ,  Fuyuki MIURA ,  Naoki SATOU ,  Kyohei TONOYAMA ,  Yasunori CHIBA ,  Masanori SUGAI ,  Junichi AOYADO

IPC: H01F27/28 ,  H01F27/24 ,  H01F41/04 ,  H01F17/00

CPC classification number: H01F27/28 ,  H01F17/0033 ,  H01F17/04 ,  H01F27/24 ,  H01F41/04 ,  H01F2017/048

Abstract: A coil device includes a conductor and a terminal electrode. The conductor is embedded in a core body and wound in a coil shape. The terminal electrode is formed on an end surface of the core body and connected with a lead end of the conductor. The coil device further includes a dummy conductor embedded in the core body separately from the conductor. An end part of the dummy conductor exposed from the end surface of the core body separately from the lead end is connected with the terminal electrode.