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公开(公告)号：US20230317342A1
公开(公告)日：2023-10-05
申请号：US18206202
申请日：2023-06-06
Applicant: TDK CORPORATION
Inventor： Shinichi SATO , Takahiro SATO , Yusuke NAGAI , Mitsuharu KOIKE , Kazuhiro MIURA , Seiichi NAKAGAWA , Shinichi KONDO , Takashi SUZUKI
CPC classification number: H01F17/0013 , H01F1/24 , H01F2017/0066
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.
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公开(公告)号：US20230223183A1
公开(公告)日：2023-07-13
申请号：US18082689
申请日：2022-12-16
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Kazuhiro EBINA , Kunihiko KAWASAKI , Shinichi KONDO , Shinichi SATO , Seiichi NAKAGAWA , Mitsuharu KOIKE , Takato SASAKI , Youhei IIDA
IPC: H01F27/29 , H01F27/255 , H01F27/28
CPC classification number: H01F27/29 , H01F27/255 , H01F27/2804 , H01F2027/2809
Abstract: The coil component includes an element body, a coil, a first electrode part and a second electrode part. The element body includes a main surface to be used as a mounting surface. The coil is disposed in the element body. The first electrode part and the second electrode part are spaced apart from each other in a first direction, embedded in the element body in such a way as to be exposed from the main surface, and electrically connected to the coil. The first electrode part includes a first surface exposed from the main surface and a protrusion disposed in the element body in such a way as to be spaced apart from the main surface. The protrusion protrudes more toward the second electrode part than the first surface in the first direction.
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公开(公告)号：US20220102039A1
公开(公告)日：2022-03-31
申请号：US17486640
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 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 plurality of metal magnetic particles contained in the element body include a plurality of metal magnetic particles having a particle diameter of ⅓ or more and ½ or less of a distance between the conductor portions adjacent to each other in the coil conductor. The metal magnetic particles having the particle diameter are arranged along a facing direction of the conductor portions between the conductor portions adjacent to each other in the coil conductor.
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公开(公告)号：US20190096561A1
公开(公告)日：2019-03-28
申请号：US16136944
申请日：2018-09-20
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Takashi SUZUKI , Hidekazu SATO , Takashi ENDO , Kouichi KAKUDA , Kunihiko KAWASAKI , Shinichi KONDO , Yuya ISHIMA , Shinichi SATO , Masaki TAKAHASHI
Abstract: In a stepwise structure formed in a multilayer coil component, a difference occurs in a shrinkage amount between a maximum film thickness portion in which the number of layers is large and a minimum film thickness portion in which the number of layers is small due to portions different in the number of layers of coil parts (that is, upper coil part, lower coil part, and connecting part) adjacent to each other like the maximum film thickness portion and the minimum film thickness portion, readily causing a crack by an inner stress due to the difference in the shrinkage amount. In a multilayer coil component according to the present disclosure, a stress relaxation part overlapping with a maximum film thickness portion whose shrinkage amount is large is provided to relax inner stress in a stepwise structure, resulting in prevention of a crack.
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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
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.
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Patent Agency Ranking
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
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.
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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.
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公开(公告)号：US20220336140A1
公开(公告)日：2022-10-20
申请号：US17717673
申请日：2022-04-11
Applicant: TDK CORPORATION
Inventor： Yu SAKURAI , Takashi SUZUKI , Hideyuki ITOH , Kouichi KAKUDA , Ryuichi WADA , Nami ENOMOTO , Yusuke NAGAI , Kunihiko KAWASAKI , Shinichi KONDO , Yuya ISHIMA
Abstract: A coil-type electronic component comprises an element including a magnetic element body and a coil conductor. A portion of the magnetic element body in between layers of the coil conductor adjacent to each other in an axis direction of the coil conductor includes first soft magnetic metal particles. A portion of the magnetic element body on an outer side along the axis includes second soft magnetic metal particles. The first soft magnetic metal particles have a saturation magnetization (Ms) higher than that of the second soft magnetic metal particles.
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公开(公告)号：US20220238265A1
公开(公告)日：2022-07-28
申请号：US17571640
申请日：2022-01-10
Applicant: TDK CORPORATION
Inventor： Shinichi KONDO , Takashi INAGAKI , Ryuichi WADA , Yusuke NAGAI , Takashi SUZUKI
Abstract: A multilayer coil device includes an element formed by laminating a coil conductor and a magnetic element body. The magnetic element body includes soft magnetic particles and an epoxy resin. The soft magnetic particles include soft magnetic metal particles. The epoxy resin has an epoxy value of 150 or less. The epoxy resin is filled in gap spaces between the soft magnetic particles.
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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
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.
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