公开(公告)号：US20230230742A1

公开(公告)日：2023-07-20

申请号：US18085983

申请日：2022-12-21

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Kosuke ITO ,  Keito YASUDA ,  Youhei IIDA

IPC: H01F17/00 ,  H01F27/29 ,  H01F27/02 ,  H01F1/36

CPC classification number: H01F17/0013 ,  H01F27/292 ,  H01F27/022 ,  H01F1/36

Abstract: A multilayer coil component includes an element body including an end surface, a coil disposed in the element body, and an external electrode disposed on an end portion of the element body and connected to the coil. The external electrode includes a conductive resin layer. The conductive resin layer includes resin and a plurality of metal particles and is in contact with the end surface. The conductive resin layer includes a metal particle group. The metal particle group consists a plurality of first metal particles included in the plurality of metal particles, and the plurality of first metal particles is adjacent to the end surface and separated from the end surface.

公开(公告)号：US20240331910A1

公开(公告)日：2024-10-03

申请号：US18404044

申请日：2024-01-04

Applicant: TDK CORPORATION

Inventor： Keito YASUDA ,  Yusuke Nagai ,  Makoto Yoshino ,  Shinichi Sato ,  Yuya Ishima ,  Youhei IIDA ,  Mitsuharu Koike ,  Takato Sasaki

IPC: H01F17/00 ,  H01F27/25

CPC classification number: H01F17/0013 ,  H01F27/25

Abstract: A coil component includes an element body having a mounting surface, and a terminal electrode disposed on the mounting surface, in which at least a part of the terminal electrode is embedded in the element body, the terminal electrode has an opening penetrating the terminal electrode in a direction orthogonal to the mounting surface, and a part of the element body is disposed in the opening.

公开(公告)号：US20240331929A1

公开(公告)日：2024-10-03

申请号：US18404362

申请日：2024-01-04

Applicant: TDK CORPORATION

Inventor： Keito YASUDA ,  Yusuke Nagai ,  Makoto Yoshino ,  Masaki Takahashi ,  Shinichi Sato ,  Yuya Ishima ,  Shingo Hattori ,  Youhei Iida ,  Mitsuharu Koike ,  Takato Sasaki

IPC: H01F27/29 ,  H01F27/28

CPC classification number: H01F27/292 ,  H01F27/2804 ,  H01F2027/2809

Abstract: A coil component 1 includes an element body having a mounting surface, a coil disposed in the element body, terminal electrodes disposed on the mounting surface of the element body, and a first connection conductor and a second connection conductor connecting the coil and the terminal electrodes, respectively, in which the first connection conductor and the second connection conductor have first portions connected to the terminal electrodes, second portions connected to the coil, and third portions connecting the first portions and the second portions, respectively, and an area of a first pore per unit area in the first portion is larger than an area of a third pore per unit area in the third portion.

公开(公告)号：US20220108836A1

公开(公告)日：2022-04-07

申请号：US17490893

申请日：2021-09-30

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Takashi SUZUKI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Keito YASUDA ,  Ryuichi WADA ,  Makoto MORITA ,  Takashi KUDO ,  Kyohei TONOYAMA

IPC: H01F27/29 ,  H01F17/00 ,  H01F17/04

Abstract: In a multilayer coil component, a part filled with a resin and a void part not filled with the resin exist between a plurality of metal magnetic particles in an element body, one main surface of the element body is a mounting surface with respect to an external electronic component, and the edge of an external electrode is positioned on the mounting surface. In the element body, a high void region where the porosity caused by the void part is higher than the porosity of the other part in the element body extends from the edge of the external electrode on the mounting surface toward an end surface of the element body.

公开(公告)号：US20230230737A1

公开(公告)日：2023-07-20

申请号：US18151070

申请日：2023-01-06

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Kouichi KAKUDA ,  Shinichi SATO ,  Keito YASUDA

IPC: H01F5/00 ,  H01F1/20

CPC classification number: H01F5/003 ,  H01F1/20

Abstract: A multilayer coil component includes: an element body including a plurality of magnetic layers that includes soft magnetic metal particles and is laminated in a first direction; and a coil disposed in the element body. The coil includes a plurality of coil conductors electrically connected to each other. The plurality of magnetic layers includes a first magnetic layer and a second magnetic layer laminated between two coil conductors adjacent to each other in the first direction. An average particle diameter of soft magnetic metal particles included in the second magnetic layer is larger than an average particle diameter of soft magnetic metal particles included in the first magnetic layer.

公开(公告)号：US20230125854A1

公开(公告)日：2023-04-27

申请号：US17970182

申请日：2022-10-20

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Takahiro SATO ,  Kunihiko KAWASAKI ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Kouichi KAKUDA ,  Mitsuharu KOIKE ,  Keito YASUDA ,  Takato SASAKI

IPC: H01F5/04 ,  H01F1/14

Abstract: A stacked coil component includes: an element body, a coil disposed inside the element body; and a first outer electrode and a second outer electrode which are disposed in the element body. Each of the first outer electrode and the second outer electrode includes an electrode portion which includes a joining surface joined to the element body, and a plating surface opposite to the joining surface and is formed by plating, and of which at least a part is embedded in the element body.

公开(公告)号：US20220181073A1

公开(公告)日：2022-06-09

申请号：US17523202

申请日：2021-11-10

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Kouichi KAKUDA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Masaki TAKAHASHI ,  Takahiro SATO ,  Keito YASUDA ,  Shingo HATTORI

IPC: H01F27/29 ,  H01F17/00 ,  H01F17/04

Abstract: In a multilayer coil component, a coil is configured by electrically connecting coil conductors respectively provided in magnetic body layers constituting an element body and metal magnetic particles have a normal particle having an ellipsoidal shape and flat particles having an ellipsoidal shape flatter in a thickness direction than the normal particle. A plurality of the normal particles and at least one of the flat particles disposed such that a surface (reference surface) including a major axis direction orthogonal to the thickness direction and a minor axis direction is along the forming surface of the coil conductor in the magnetic body layer are arranged in the lamination direction of the magnetic body layers between the coil conductors.

公开(公告)号：US20220108835A1

公开(公告)日：2022-04-07

申请号：US17490411

申请日：2021-09-30

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Takashi SUZUKI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Keito YASUDA ,  Ryuichi WADA

IPC: H01F27/29 ,  H01F1/28

Abstract: A multilayer coil component includes: an element body containing a plurality of metal magnetic particles; a coil disposed in the element body; and an external electrode disposed on a surface of the element body and electrically connected to the coil. At least a part of a void part between the metal magnetic particles in the element body is filled with a first resin, the external electrode has a resin electrode containing a second resin and a conductor powder dispersed in the second resin, and the second resin connected from the resin electrode extends into the element body.