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公开(公告)号：US12217897B2
公开(公告)日：2025-02-04
申请号：US17368332
申请日：2021-07-06
Applicant: TDK CORPORATION
Inventor： Yuya Oshima , Junichi Otsuka , Shinichi Kondo , Yohei Tadaki , Kazuo Iwai , Masayuki Suzuki , Emiri Matsuhashi , Takuya Niibori
Abstract: A multilayer coil component includes an element body, first and second coils, and a pair of external electrodes. The element body includes a plurality of insulator layers laminated in a first direction. The element body has a pair of end surfaces opposing each other in a second direction orthogonal to the first direction. The first coil and the second coil are disposed in the element body and respectively have coil shafts along the second direction. The pair of external electrodes are disposed on the pair of end surfaces and electrically connected to both ends of the first coil and the second coil. The first coil includes a first conductor layer, a second conductor layer, and a first through hole conductor. The coil shaft of the first coil is disposed inside the second 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：US11705276B2
公开(公告)日：2023-07-18
申请号：US17010427
申请日：2020-09-02
Applicant: TDK CORPORATION
Inventor： Yuya Ishima , Shinichi Kondo , Kosuke Ito , Shingo Hattori
CPC classification number: H01F41/041 , H01F17/0013 , H01F27/292 , H01F41/0233 , H05K1/165 , H05K3/46
Abstract: A method for manufacturing an electronic-component includes a step of forming a laminate substrate including a plurality of laminates disposed in a direction intersecting with a lamination direction via a division portion by laminating a plurality of insulator layers, and a step of singulating the plurality of laminates by removing the division portion. The step of forming the laminate substrate includes a step of forming an insulator resist layer containing an insulating material on a base material, the insulating material being a constituent material of each of the insulator layers and a step of forming the insulator layer by curing the insulator resist layer by exposure, except for at least an insulator resist portion corresponding to the division portion. The division portion including the insulator resist portion is removed by development in the step of singulating.
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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：US11189413B2
公开(公告)日：2021-11-30
申请号：US16158779
申请日：2018-10-12
Applicant: TDK CORPORATION
Inventor： Yuya Oshima , Shinichi Kondo , Junichi Otsuka , Yohei Tadaki , Kazuo Iwai , Masayuki Suzuki , Shigeshi Osawa , Kazuhiro Ebina , Makoto Yoshino , Mamoru Kawauchi
Abstract: First internal conductors are separated from each other in a first direction. Each of the first internal conductors includes a coil portion and a pad portion having a width larger than a width of the coil portion. The pad portions adjacent to each other in the first direction are connected to each other via a through-hole conductor and overlap each other when viewed from the first direction. When viewed from the first direction, each of the coil portions includes a first portion not overlapping the pad portion adjacent in the first direction and a second portion overlapping a part of the pad portion adjacent in the first direction. A second internal conductor is disposed on the same layer as the second portion and is positioned to overlap a portion of the pad portion adjacent in the first direction not overlapping the second portion when viewed from the first direction.
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Patent Agency Ranking
公开(公告)号：US11168022B2
公开(公告)日：2021-11-09
申请号：US16181715
申请日：2018-11-06
Applicant: TDK CORPORATION
Inventor： Shusaku Umemoto , Takashi Suzuki , Hidekazu Sato , Masaki Takahashi , Shinichi Kondo
IPC: C03C10/00 , C03C4/16 , H01F27/32 , H01F41/02 , H01F27/28 , H01F41/04 , H01F27/29 , H01F17/00 , H01F41/12
Abstract: A glass ceramics sintered body includes a glass phase and a ceramics phase dispersed in the glass phase. The ceramics phase includes alumina grains and zirconia grains. The glass phase includes an MO—Al2O3—SiO2—B2O3 based glass, where M is an alkaline earth metal. An area ratio of the alumina grains is 13 to 30%, and an area ratio of the zirconia grains is 0.05 to 6%, on a cross section of the sintered body.
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公开(公告)号：US10665388B2
公开(公告)日：2020-05-26
申请号：US15725129
申请日：2017-10-04
Applicant: TDK CORPORATION
Inventor： Yuya Oshima , Makoto Yoshino , Yoji Tozawa , Junichi Otsuka , Kazuo Iwai , Yohei Tadaki , Shinichi Kondo , Kazuhiro Ebina , Mamoru Kawauchi
Abstract: A method of manufacturing a laminated coil component is a method of manufacturing a laminated coil component provided with a laminate obtained by laminating a coil conductor forming a spiral coil and an insulator layer. The method of manufacturing a laminated coil component includes a step of providing a conductor pattern configured to become a coil conductor on a green sheet configured to become an insulator layer, and a step of laminating a plurality of green sheets provided with the conductor pattern. The conductor pattern includes a pair of first side surfaces opposed to each other in an orthogonal direction orthogonal to a laminating direction of the green sheet. At the step of laminating a plurality of green sheets, a depression is formed on at least one of the pair of first side surfaces.
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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：US09305690B2
公开(公告)日：2016-04-05
申请号：US14266214
申请日：2014-04-30
Applicant: TDK CORPORATION
Inventor： Hiroki Choto , Takashi Suzuki , Shinichi Kondo , Yuya Oshima , Masahiro Endo , Masaki Takahashi
CPC classification number: H01F1/401 , H01F1/37 , H01F17/0013
Abstract: A composite ferrite composition comprises a magnetic material and a non-magnetic material. A mixing ratio of said magnetic material and said non-magnetic material is 20 wt %:80 wt % to 80 wt %:20 wt %. Ni—Cu—Zn based ferrite is used as the magnetic material. Oxides of Zn, Cu, and Si are at least included in a main component of said non-magnetic material. Borosilicate glass is included in a subcomponent of said non-magnetic material.
Abstract translation: 复合铁氧体组合物包括磁性材料和非磁性材料。 所述磁性材料和所述非磁性材料的混合比为20重量％：80重量％至80重量％：20重量％。 使用Ni-Cu-Zn系铁氧体作为磁性材料。 Zn，Cu和Si的氧化物至少包括在所述非磁性材料的主要成分中。 硼硅酸盐玻璃被包括在所述非磁性材料的副成分中。
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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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