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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：US20190198232A1
公开(公告)日：2019-06-27
申请号：US16227112
申请日：2018-12-20
Applicant: TDK CORPORATION
Inventor： Takahiro SATO , Hitoshi KUDO , Takashi SUZUKI , Kouichi KAKUDA , Tatsuro SUZUKI , Hiroyuki TANOUE
CPC classification number: H01F27/292 , H01F1/344 , H01F27/2804 , H01F41/041 , H01F2027/2809
Abstract: In a multilayer coil component, a ferrite element body includes a first element body portion and a second element body portion adjacent to each other in an axial direction of the multilayer coil, in which a dielectric constant of the second element body portion is lower than a dielectric constant of the first element body portion, and a magnetic permeability of the second element body portion is higher than a magnetic permeability of the first element body portion. The inventors newly found that the first element body portion and the second element body portion contribute to coil characteristics when a coil winding portion is provided to extend over the first element body portion and the second element body portion. In the multilayer coil component, desired coil characteristics can be obtained by adjusting proportions of the first element body portion and the second element body portion in the ferrite element body.
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公开(公告)号：US20190198227A1
公开(公告)日：2019-06-27
申请号：US16227167
申请日：2018-12-20
Applicant: TDK CORPORATION
Inventor： Takahiro SATO , Hitoshi KUDO , Takashi SUZUKI , Kouichi KAKUDA , Tatsuro SUZUKI , Hiroyuki TANOUE
CPC classification number: H01F27/2804 , H01F1/344 , H01F2027/2809
Abstract: The inventors have newly found that, even when a composition of a first element body portion and a composition of a second element body portion are different from each other, a high bonding strength at an interface between the first element body portion and the second element body portion can be obtained when both the first element body portion and the second element body portion contain Zn2SiO4 as a constituent component. That is, when the first element body portion and the second element body portion contain Zn2SiO4, a bonding strength at the interface is improved compared to a case in which the first element body portion and the second element body portion do not contain Zn2SiO4.
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公开(公告)号：US20180096768A1
公开(公告)日：2018-04-05
申请号：US15708625
申请日：2017-09-19
Applicant: TDK CORPORATION
Inventor： Takeshi SHIBAYAMA , Asuka MURAI , Yukio TAKAHASHI , Takashi SUZUKI , Hiroyuki TANOUE , Masaki TAKAHASHI
CPC classification number: H01F1/344 , C04B35/265 , C04B35/6261 , C04B2235/3277 , C04B2235/3279 , C04B2235/3281 , C04B2235/3284 , C04B2235/3298 , C04B2235/3418 , C04B2235/604 , C04B2235/608 , C04B2235/94 , H01F17/0013 , H01F41/046
Abstract: A ferrite composition includes a main component and an accessory component. The main component includes 18 to 30 mol % of iron oxide in terms of Fe2O3, 4 to 14 mol % of copper oxide in terms of CuO, 0 to 6 mol % of zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The accessory component includes 0.30 to 1.83 pts.wt. of silicon compound in terms of SiO2, 2.00 to 10.00 pts.wt. of cobalt compound in terms of Co3O4, and 1.00 to 3.00 pts.wt. of bismuth compound in terms of Bi2O3 with respect to 100 pts.wt. of the main component. A cobalt compound content in terms of Co3O4 divided by a silicon compound content in terms of SiO2 is a value of 5.5 to 30.0.
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Patent Agency Ranking
公开(公告)号：US20160300651A1
公开(公告)日：2016-10-13
申请号：US15090196
申请日：2016-04-04
Applicant: TDK CORPORATION
Inventor： Hiroki CHOTO , Takeshi SHIBAYAMA , Ryuichi WADA , Kouichi KAKUDA , Yukari AKITA , Asuka MURAI , Yukio TAKAHASHI , Takashi SUZUKI , Akinori OHI
CPC classification number: H01F41/0246 , C04B35/26 , C04B35/2666 , C04B35/6261 , C04B35/62645 , C04B35/62695 , C04B2235/3244 , C04B2235/3277 , C04B2235/3279 , C04B2235/3281 , C04B2235/3284 , C04B2235/3298 , C04B2235/3418 , C04B2235/77 , C04B2235/94 , H01F1/344 , H01F27/2804 , H01F2027/2809
Abstract: A ferrite composition composed of a main component including 26 to 46 mol % of an iron oxide in terms of Fe2O3, 4 to 14 mol % of a copper oxide in terms of CuO, 0 to 26 mol % of a zinc oxide in terms of ZnO, and a residue of 40.0 mol % or more of a nickel oxide in terms of NiO. The ferrite composition, with respect to 100 parts by weight of the main component, is also composed of a subcomponent including 0.8 to 10.0 parts by weight of a silicon compound in terms of SiO2, 1.0 to 15.0 parts by weight of a cobalt compound in terms of Co3O4, and 0.7 to 30.0 parts by weight of a bismuth compound in terms of Bi2O3. A value of the cobalt compound content in terms of Co3O4 divided by the silicon compound content in terms of SiO2 is 0.4 to 5.5.
Abstract translation: 由以Fe 2 O 3计的氧化铁为26〜46摩尔％，CuO换算为氧化铜为4〜14摩尔％，ZnO为0〜26摩尔％的氧化锌为主成分的铁素体组合物 ，NiO为40.0摩尔％以上的氧化镍的残渣。 相对于100重量份的主成分，铁素体组合物也由以SiO 2为0.8〜10.0重量份的硅化合物，以化合物计1.0〜15.0重量份的化合物构成的副成分 的Co 3 O 4和0.7〜30.0重量份的Bi 2 O 3换算的铋化合物。 以Co 3 O 4计的钴化合物含量除以硅化合物含量换算成SiO 2的值为0.4〜5.5。
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公开(公告)号：US20250157724A1
公开(公告)日：2025-05-15
申请号：US19022371
申请日：2025-01-15
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：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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公开(公告)号：US20210065975A1
公开(公告)日：2021-03-04
申请号：US17004334
申请日：2020-08-27
Applicant: TDK CORPORATION
Inventor： Yuya ISHIMA , Shinichi KONDO , Kosuke ITO , Shingo HATTORI , Takashi SUZUKI , Hidenobu UMEDA
Abstract: A method for producing a multilayer coil component includes forming, on a main face of a substrate, a first coil conductor extending along the main face having conductivity, forming a second coil conductor and a third coil conductor apart from each other in a direction in which the first coil conductor extends and each extending from the first coil conductor in a first direction orthogonal to the main face, and forming a fourth coil conductor electrically connected to an end of the second coil conductor opposite to the first coil conductor and extending along the main face. The forming the first coil conductor includes forming, on the main face, a first insulator layer provided with a first penetration portion having a shape corresponding to the first coil conductor and exposing a part of the main face, and forming, by plating, the first coil conductor in the first penetration portion.
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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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