公开(公告)号：US20230230738A1

公开(公告)日：2023-07-20

申请号：US18097556

申请日：2023-01-17

Applicant: TDK Corporation

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Mitsuharu KOIKE ,  Takato SASAKI ,  Youhei IIDA

IPC: H01F5/04 ,  H01F5/06 ,  H01F27/29 ,  H01F27/32 ,  H01F1/20

CPC classification number: H01F5/04 ,  H01F5/06 ,  H01F27/292 ,  H01F27/323 ,  H01F1/20

Abstract: A coil component includes an element body, a coil and a first electrode part. The element body includes a main surface which is used as a mounting surface. The coil is disposed in the element body. The first electrode part is embedded in the element body and electrically connected to the coil. The first electrode part includes a first surface exposed from the main surface and a second surface opposing the first surface. An area of the first surface is larger than an area of the second surface when viewed from a direction orthogonal to the first surface.

公开(公告)号：US20230072794A1

公开(公告)日：2023-03-09

申请号：US17939027

申请日：2022-09-07

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Takahiro SATO ,  Kunihiko KAWASAKI ,  Shinichi SATO ,  Shinichi KONDO ,  Kouichi KAKUDA ,  Yuya ISHIMA ,  Kosuke ITO

IPC: H01F17/00 ,  H01F27/29 ,  H01F3/08

Abstract: A multilayer coil component includes: an element body formed by stacking a magnetic body layer containing a plurality of metal magnetic particles of a soft magnetic material; a first coil disposed in the element body and configured to include a plurality of first coil conductors; a second coil disposed in the element body and configured to include a plurality of second coil conductors; a first external electrode to which one end portion of each of the first coil and the second coil is connected; and a second external electrode to which the other end portion of each of the first coil and the second coil is connected.

公开(公告)号：US20230070168A1

公开(公告)日：2023-03-09

申请号：US17939036

申请日：2022-09-07

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Takahiro SATO ,  Kunihiko KAWASAKI ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Kouichi KAKUDA ,  Yuya ISHIMA ,  Mitsuru ITO

IPC: H01F27/29

Abstract: A multilayer coil component includes: an element body; a coil disposed in the element body; and a first external electrode disposed on a surface of the element body in which the first external electrode has a first electrode layer disposed on the surface of the element body and a first plating layer and a second plating layer disposed on the first electrode layer, and the first plating layer and the second plating layer are disposed so as to be scattered in a plurality of places on an edge of the first electrode layer.

公开(公告)号：US20170330673A1

公开(公告)日：2017-11-16

申请号：US15497314

申请日：2017-04-26

Applicant: TDK CORPORATION

Inventor： Shinichi SATO ,  Yohei TADAKI ,  Akihiko OIDE ,  Yuma ISHIKAWA ,  Hidekazu SATO

IPC: H01F27/245 ,  H01F41/04 ,  H01F27/32 ,  H01F27/29 ,  H01F27/28 ,  H01F41/12 ,  H01F27/255

CPC classification number: H01F27/245 ,  H01F17/0013 ,  H01F17/04 ,  H01F27/022 ,  H01F27/255 ,  H01F27/2804 ,  H01F27/29 ,  H01F27/292 ,  H01F27/323 ,  H01F41/043 ,  H01F41/122

Abstract: A multilayer coil component includes an element body made of a ferrite sintered body and a coil. The coil is configured with a plurality of internal conductors juxtaposed in the element body and electrically connected to one another. An average crystal grain size in a surface region of the element body is smaller than an average crystal grain size in a region between the internal conductors in the element body. A surface of the element body is covered with a layer made of an insulating material. The insulating material is not present among the crystal grains in the surface region of the element body.

公开(公告)号：US20170309389A1

公开(公告)日：2017-10-26

申请号：US15488876

申请日：2017-04-17

Applicant: TDK CORPORATION

Inventor： Shinichi SATO ,  Yohei TADAKI ,  Akihiko OIDE ,  Yuma ISHIKAWA ,  Hidekazu SATO ,  Kazuhiro EBINA ,  Hiroyuki TANOUE

IPC: H01F27/28 ,  H01F27/29 ,  H01F27/32 ,  H01F41/04 ,  H01F41/12

Abstract: An electronic component includes: an element body in which a plurality of insulator layers are stacked; a coil in which a plurality of inner conductors installed in the element body are electrically connected to each other; and an outer electrode that is disposed on an outer surface of the element body, is electrically connected to the coil, and includes at least a baked electrode layer. The inner conductor connected to the outer electrode includes a connection conductor that electrically connects the baked electrode layer to the inner conductor. The connection conductor includes a protruding portion that protrudes from the outer surface of the element body to the outer electrode. The protruding portion includes a metal having a smaller diffusion coefficient than a metal of a main component included in the baked electrode layer. The inner conductors have a lower electric resistance value than the metal included in the protruding portion.

公开(公告)号：US20250069795A1

公开(公告)日：2025-02-27

申请号：US18941111

申请日：2024-11-08

Applicant: TDK CORPORATION

Inventor： Masashi SHIMOYASU ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Mamoru KAWAUCHI ,  Shigetoshi KINOUCHI ,  Mitsuru ITO ,  Yuto SHIGA

IPC: H01F27/28 ,  H01F17/00 ,  H01F27/29 ,  H01F27/32

Abstract: A multilayer coil component includes an element body, a coil in the element body, a connection conductor in the element body, and an external electrode on the element body. The element body includes a principal surface arranged to constitute a mounting surface and an end surface positioned adjacent to the principal surface. The connection conductor includes one end connected to the coil and another end connected to the external electrode. The external electrode includes a sintered metal layer formed on the element body and a conductive resin layer formed on the sintered metal layer. The sintered metal layer includes a portion on the principal surface and a portion on the end surface. The portion on the principal surface has an average thickness smaller than an average thickness of the portion on the end surface.

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：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.

公开(公告)号：US20200303110A1

公开(公告)日：2020-09-24

申请号：US16817046

申请日：2020-03-12

Applicant: TDK CORPORATION

Inventor： Shinichi SATO ,  Takahiro SATO ,  Yusuke NAGAI ,  Mitsuharu KOIKE ,  Kazuhiro MIURA ,  Seiichi NAKAGAWA ,  Shinichi KONDO ,  Takashi SUZUKI

IPC: H01F17/00 ,  H01F1/24

Abstract: A multilayer coil component includes an element body including a plurality of metal magnetic particles, and a plurality of coil conductors. The plurality of coil conductors is disposed in the element body. The plurality of coil conductors is separated from each other in a predetermined direction and electrically connected to each other. The plurality of coil conductors includes one pair of side surfaces opposing each other in the predetermined direction. Surface roughness of the one pair of side surfaces is less than 40% of an average particle size of the plurality of metal magnetic particles.