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

IPC: H01F27/32 ,  H01F27/28 ,  H01F41/04 ,  H01F17/00

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.

公开(公告)号：US20210327606A1

公开(公告)日：2021-10-21

申请号：US17230521

申请日：2021-04-14

Applicant: TDK CORPORATION

Inventor： Yuya Ishima ,  Masaki Takahashi ,  Akira Suda ,  Takashi Suzuki ,  Hidenobu Umeda

IPC: H01B1/22 ,  H01F27/28 ,  H01F41/04 ,  G03F7/004

Abstract: In a photosensitive conductive paste containing photosensitive organic components, conductor powder, and quartz powder, melting of the quartz powder does not occur or is very unlikely to occur in a heat treatment step, and in the heat treatment step, it functions sufficiently to bring shrinkage rates and shrinkage behaviors of both of a conductor layer and an element body layer closer to each other when they shrink, and thus generation of voids can be inhibited when it is used for manufacturing a laminated coil component.

公开(公告)号：US10984939B2

公开(公告)日：2021-04-20

申请号：US15419522

申请日：2017-01-30

Applicant: TDK CORPORATION

Inventor： Takashi Endo ,  Kenji Komorita ,  Kunihiko Kawasaki ,  Hidekazu Sato ,  Takashi Suzuki

IPC: H01F5/00 ,  H01F17/00

Abstract: A multilayer coil component includes an element body, a coil including a plurality of internal conductors, and a plurality of stress-relaxation spaces. The plurality of internal conductors are separated from each other in a first direction in the element body. Each stress-relaxation space is in contact with a surface of the corresponding internal conductor and powders exist in each stress-relaxation space. The element body includes element body regions located between the internal conductors adjacent to each other in the first direction. Each stress-relaxation space includes a first boundary surface with each internal conductor and a second boundary surface with each element body region. The first boundary surface and the second boundary surface oppose each other in the first direction. A distance between the first boundary surface and the second boundary surface is smaller than a thickness of each element body region in the first direction.

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

IPC: H01F5/00 ,  H01F27/28 ,  H01F1/40 ,  H01F1/37 ,  H01F17/00

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。

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

IPC: H01F27/28 ,  H01F1/24 ,  H01F17/00

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.

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

IPC: H01F17/00 ,  H01F17/04 ,  H01F27/34 ,  H01F41/04 ,  H01F27/29

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.

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.

公开(公告)号：US10770210B2

公开(公告)日：2020-09-08

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

IPC: H01F1/34 ,  C04B35/626 ,  C04B35/26 ,  H01F17/00 ,  H01F41/04

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.

公开(公告)号：US09984799B2

公开(公告)日：2018-05-29

申请号：US14507216

申请日：2014-10-06

Applicant: TDK CORPORATION

Inventor： Ryuichi Wada ,  Kouichi Kakuda ,  Hiroki Choto ,  Yukari Akita ,  Yukio Takahashi ,  Masahiro Endo ,  Takashi Suzuki ,  Takahiro Sato ,  Akinori Ohi

IPC: H01F1/34 ,  H01F1/01 ,  H01F27/255 ,  C04B35/26 ,  C04B35/626 ,  H01F38/14 ,  H01F3/08 ,  H01F17/00 ,  H01F17/04

CPC classification number: H01F1/01 ,  C04B35/26 ,  C04B35/62645 ,  C04B2235/3275 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/77 ,  H01F1/344 ,  H01F3/08 ,  H01F17/0013 ,  H01F17/04 ,  H01F27/255 ,  H01F38/14

Abstract: A ferrite composition comprises a main component and a sub component. The main component is comprised of 25.0 to 49.8 mol % iron oxide in terms of Fe2O3, 5.0 to 14.0 mol % copper oxide in terms of CuO, 0 to 40.0 mol % zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The sub component includes 0.2 to 5.0 wt % silicon oxide in terms of SiO2, 0.10 to 3.00 wt % bismuth oxide in terms of Bi2O3, and 0.10 to 3.00 wt % cobalt oxide in terms of Co3O4, with respect to the main component.

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

IPC: C04B35/30 ,  H01F1/01 ,  H01F27/28 ,  H01F1/34 ,  H01F3/08 ,  H01F17/00 ,  H01F17/04 ,  H01F38/14

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％。