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公开(公告)号：US20240242883A1
公开(公告)日：2024-07-18
申请号：US18410188
申请日：2024-01-11
Applicant: TDK Corporation
Inventor： Yuya ISHIMA , Kenji KOMORITA , Shingo HATTORI , Yoji TOZAWA , Masaki TAKAHASHI , Hidenobu UMEDA , Yusuke NAGAI , Akihiko OIDE
IPC: H01F41/076 , H01F41/12
CPC classification number: H01F41/076 , H01F41/122
Abstract: A method for manufacturing a coil component including an element body, and a coil disposed inside the element body and including a first coil conductor and a second coil conductor having different shapes, the method comprises: applying a first photosensitive conductive paste on a substrate and exposing the first photosensitive conductive paste to light with a pattern corresponding to the first coil conductor to form a first curing pattern; after the forming of the first curing pattern, applying a second photosensitive conductive paste on the first photosensitive conductive paste and exposing the second photosensitive conductive paste to light with a pattern corresponding to the second coil conductor to form a second curing pattern; after the forming of the second curing pattern, developing portions of the first photosensitive conductive paste and the second photosensitive conductive paste that were not exposed; and after the developing, adding an insulating material on the substrate.
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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
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.
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公开(公告)号：US20230215616A1
公开(公告)日：2023-07-06
申请号：US18090240
申请日：2022-12-28
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Kazuhiro EBINA , Kunihiko KAWASAKI , Shinichi KONDO , Yuya ISHIMA , Shinichi SATO , Kosuke ITO
CPC classification number: H01F27/292 , H01F17/0013 , H01F1/24
Abstract: A coil component includes: an element body; a coil including a plurality of coil conductors disposed in the element body and electrically connected to each other; an external electrode disposed on the element body; and a connection conductor that connects the coil and the external electrode. The connection conductor has an end portion exposed from an outer surface of the element body and connected to the external electrode. The end portion has a shape extending outward over an entire circumference.
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公开(公告)号：US20220277879A1
公开(公告)日：2022-09-01
申请号：US17666170
申请日：2022-02-07
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Hidekazu SATO , Kazuhiro EBINA , Kunihiko KAWASAKI , Takahiro SATO , Kouichi KAKUDA , Yuya ISHIMA , Shinichi KONDO , Shinichi SATO , Masaki TAKAHASHI
Abstract: In a multilayer coil component, first and second conductor patterns respectively have parallel parts that overlap in a lamination direction and non-parallel parts that do not overlap. The parallel parts of the first and second conductor patterns of one set are interconnected by a first through hole. The non-parallel parts of the first and second conductor patterns of sets adjacent to each other in the lamination direction are interconnected by a second through hole.
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公开(公告)号：US20220059264A1
公开(公告)日：2022-02-24
申请号：US17408155
申请日：2021-08-20
Applicant: TDK CORPORATION
Inventor： Ryuichi WADA , Takashi SUZUKI , Yusuke NAGAI , Kaori SASAKI , Tatsuro SUZUKI
IPC: H01F1/22
Abstract: A composite magnetic body includes soft magnetic metal particles and non-magnetic ceramic particles each having a particle size (D50) smaller than that of the soft magnetic metal particles.
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Patent Agency Ranking
公开(公告)号：US20200303117A1
公开(公告)日：2020-09-24
申请号：US16816891
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
Abstract: A multilayer coil component includes an element body and a plurality of coil conductors. The element body includes a plurality of metal magnetic particles and resin existing between the plurality of metal magnetic particles. The plurality of coil conductors is disposed in the element body, the plurality of coil conductors being separated from each other in a predetermined direction and electrically connected to each other. The plurality of metal magnetic particles included in the element body includes a plurality of metal magnetic particles having a particle size equal to or greater than one third of a distance between the coil conductors adjacent to each other in the predetermined direction and equal to or less than a half of the distance. Between the coil conductors adjacent to each other in the predetermined direction, the metal magnetic particles having the particle size are distributed along the predetermined direction.
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公开(公告)号：US20230420172A1
公开(公告)日：2023-12-28
申请号：US18367503
申请日：2023-09-13
Applicant: TDK CORPORATION
Inventor： Hidekazu SATO , Takahiro SATO , Hitoshi KUDO , Takashi ENDO , Yusuke NAGAI , Tatsuro SUZUKI , Hiroko KORIKAWA , Kenji KOMORITA
CPC classification number: H01F17/0013 , H01F17/04 , H01F41/046 , H01F27/2804 , H01F5/003 , H01F27/292
Abstract: A multilayer coil component includes an element body having a multilayer structure including a first element body portion formed of a ferrite element body material, and a second element body portion laminated on the first element body portion and formed of a ferrite element body material having a composition different from the ferrite element body material forming the first element body portion, a multilayer coil having an axis parallel to a lamination direction of the element body, and a stress alleviation portion provided in an inner region of the multilayer coil when viewed from the lamination direction. In the multilayer coil component, the stress alleviation portion is provided in the inner region of the multilayer coil in which a stress tends to be concentrated to alleviate the stress in the inner region of the multilayer coil, and thereby occurrence of cracking in the element body can be suppressed.
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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
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.
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公开(公告)号：US20220102038A1
公开(公告)日：2022-03-31
申请号：US17486258
申请日：2021-09-27
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Takashi SUZUKI , Kazuhiro EBINA , Kouichi KAKUDA , Kunihiko KAWASAKI , Shinichi KONDO , Shinichi SATO , Seiichi NAKAGAWA , Mitsuharu KOIKE , Kazuhiro MIURA
Abstract: A multilayer coil component includes an element body containing a plurality of metal magnetic particles and a resin existing between the plurality of metal magnetic particles and a coil disposed in the element body and configured to include a plurality of electrically interconnected coil conductors. At least one of the plurality of coil conductors has a spiral shape and has conductor portions adjacent to each other when viewed from a direction along a coil axis of the coil. The conductor portion includes a straight conductor portion extending in a straight line and a connecting conductor portion connecting the straight conductor portion and constituting a corner portion of the coil conductor. The metal magnetic particles between the connecting conductor portions adjacent to each other are lower in density than the metal magnetic particles between the straight conductor portions adjacent to each other.
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公开(公告)号：US20240079177A1
公开(公告)日：2024-03-07
申请号：US18359419
申请日：2023-07-26
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Kazuhiro EBINA , Takahiro SATO , Masaki TAKAHASHI , Takashi ENDO , Yuya ISHIMA , Kosuke ITO , Takuya MIYASHITA
CPC classification number: H01F27/292 , H01F17/0013 , H01F2017/0066
Abstract: A multilayer coil component includes an element body, a plurality of coil conductors, a first resistive layer, and a second resistive layer. The plurality of coil conductors are disposed in the element body and electrically connected to each other. The plurality of coil conductors include a first coil conductor and a second coil conductor adjacent to each other. The first resistive layer and the second resistive layer oppose each other between the first coil conductor and the second coil conductor. The first resistive layer is in contact with the first coil conductor.
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