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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
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.
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公开(公告)号：US11631530B2
公开(公告)日：2023-04-18
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：US12249453B2
公开(公告)日：2025-03-11
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
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.
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公开(公告)号：US12243675B2
公开(公告)日：2025-03-04
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：US20240404740A1
公开(公告)日：2024-12-05
申请号：US18635645
申请日：2024-04-15
Applicant: TDK Corporation
Inventor： Yusuke Nagai , Takahiro Sato , Hidenobu Umeda , Takeshi Shibayama , Shinichi Sato , Yuya Ishima , Youhei Iida , Mitsuharu Koike , Keito Yasuda , Takato Sasaki
Abstract: A multilayer coil component includes an element body that contains a plurality of metal magnetic particles made of a soft magnetic material, and at least two conductors that are in contact with the element body. Surfaces of the plurality of metal magnetic particles are covered by an oxide film having an insulating property, an insulating portion having an insulating property is formed in at least a part of a surface of at least one conductor of the two conductors in the conductor, and a thickness of the insulating portion is larger than a thickness of the oxide film.
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Patent Agency Ranking
公开(公告)号：US20240331911A1
公开(公告)日：2024-10-03
申请号：US18404288
申请日：2024-01-04
Applicant: TDK Corporation
Inventor： Yusuke Nagai , Takahiro Sato , Makoto Yoshino , Hidenobu Umeda , Masaki Takahashi , Yuya Ishima , Kosuke Ito , Keito Yasuda , Takato Sasaki , Takuya Miyashita
CPC classification number: H01F17/0013 , H01F17/0006 , H01F27/292 , H01F2017/0073
Abstract: A multilayer coil component includes an element body, a coil disposed in the element body, terminal electrodes disposed in the element body, and a first connection conductor and a second connection conductor that connect the coil and the terminal electrodes. A plurality of first pores are provided in the coil, a plurality of second pores are provided in the first connection conductor and the second connection conductor, and an area of the second pore per unit area in the first connection conductor and the second connection conductor is larger than an area of the first pore per unit area in the coil.
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公开(公告)号：US12087484B2
公开(公告)日：2024-09-10
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：US11211188B2
公开(公告)日：2021-12-28
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：US09536645B2
公开(公告)日：2017-01-03
申请号：US14508499
申请日：2014-10-07
Applicant: TDK CORPORATION
Inventor： Ryuichi Wada , Kouichi Kakuda , Yukari Akita , Yukio Takahashi , Yusuke Nagai , Takashi Suzuki , Takahiro Sato
CPC classification number: H01F1/01 , C04B35/62625 , C04B35/62675 , C04B35/62695 , C04B35/63416 , C04B2235/3275 , C04B2235/3279 , C04B2235/3281 , C04B2235/3284 , C04B2235/3293 , C04B2235/3298 , C04B2235/604 , C04B2235/608 , C04B2235/77 , H01F1/344 , H01F3/08 , H01F17/0013 , H01F17/04 , H01F27/2804 , H01F38/14 , H01F2027/2809
Abstract: A ferrite composition comprises a main component and a sub component. The main component is comprised of 40.0 to 49.8 mol % iron oxide in terms of Fe2O3, 5.0 to 14.0 mol % copper oxide in terms of CuO, 0 to 32.0 mol % zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The sub component includes 0.5 to 4.0 wt % tin oxide in terms of SnO2, 0.10 to 1.00 wt % bismuth oxide in terms of Bi2O3, and 0.21 to 3.00 wt % cobalt oxide in terms of Co3O4, with respect to the main component.
Abstract translation: 铁素体组合物包括主要组分和副组分。 主成分由Fe2O3为40.0〜49.8摩尔％的氧化铁，以CuO换算为5.0〜14.0摩尔％的氧化铜，换算成氧化锌为0〜32.0摩尔％，还有部分为氧化镍。 副成分相对于主成分，以SnO 2计，氧化锡为0.5〜4.0重量％，氧化铋为0.10〜1.00重量％，氧化铋为100重量％，Co 3 O 4为0.21〜3.00重量％。
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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
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.
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