公开(公告)号：US11482371B2

公开(公告)日：2022-10-25

申请号：US16715245

申请日：2019-12-16

Applicant: TDK CORPORATION

Inventor： Shinichi Sato ,  Yohei Tadaki ,  Akihiko Oide ,  Yuma Ishikawa ,  Hidekazu Sato ,  Kazuhiro Ebina ,  Hiroyuki Tanoue

IPC: H01F5/00 ,  H01F27/28 ,  H01F17/00 ,  H01F27/29 ,  H01F27/32 ,  H01F41/04 ,  H01F41/12

Abstract: An electronic component includes: an element body in which a plurality of insulator layers are stacked; a coil in which a plurality of inner conductors installed in the element body are electrically connected to each other; and an outer electrode that is disposed on an outer surface of the element body, is electrically connected to the coil, and includes at least a baked electrode layer. The inner conductor connected to the outer electrode includes a connection conductor that electrically connects the baked electrode layer to the inner conductor. The connection conductor includes a protruding portion that protrudes from the outer surface of the element body to the outer electrode. The protruding portion includes a metal having a smaller diffusion coefficient than a metal of a main component included in the baked electrode layer. The inner conductors have a lower electric resistance value than the metal included in the protruding portion.

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：US11367559B2

公开(公告)日：2022-06-21

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

IPC: H01F27/28 ,  H01F1/34 ,  H01F3/10 ,  H01F17/00 ,  H01F27/29

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.

公开(公告)号：US11380476B2

公开(公告)日：2022-07-05

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

IPC: H01F27/29 ,  H01F27/28 ,  H01F17/00 ,  H01F41/04 ,  H01F1/34

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.

公开(公告)号：US10894745B2

公开(公告)日：2021-01-19

申请号：US15678775

申请日：2017-08-16

Applicant: TDK CORPORATION

Inventor： Kouichi Kakuda ,  Ryuichi Wada ,  Yukio Takahashi ,  Hiroyuki Tanoue ,  Tatsuro Suzuki ,  Takahiro Sato ,  Takashi Suzuki

IPC: H01F1/34 ,  H01F17/04 ,  H01F41/02 ,  C04B35/26 ,  C01G53/00 ,  H01F17/00

Abstract: A ferrite composition includes a main component and an accessory component. The main component includes 43.0 to 51.0 mol % of iron oxide in terms of Fe2O3, 5.0 to 15.0 mol % of copper oxide in terms of CuO, 1.0 to 24.9 mol % of zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The accessory component includes 0.2 to 3.0 pts. wt. of silicon compound in terms of SiO2, 3.0 to 8.0 pts. wt. of cobalt compound in terms of Co3O4 (excluding 3.0 pts. wt.), and 0.2 to 8.0 pts. wt. of bismuth compound in terms of Bi2O3 with respect to 100 pts. wt. of the main component.

公开(公告)号：US10020791B2

公开(公告)日：2018-07-10

申请号：US15090129

申请日：2016-04-04

Applicant: TDK CORPORATION

Inventor： Kouichi Kakuda ,  Ryuichi Wada ,  Yukari Akita ,  Yukio Takahashi ,  Takashi Suzuki ,  Asuka Murai ,  Hiroyuki Tanoue

IPC: C04B35/30 ,  H03H7/01 ,  C04B35/26 ,  H01F1/34 ,  H01F17/00 ,  H01F17/04

CPC classification number: H03H7/0115 ,  C04B35/265 ,  H01F1/344 ,  H01F17/0013 ,  H01F17/04 ,  H01F2017/0026 ,  H01F2017/048

Abstract: Provided is a ferrite composition composed of: a main component including 23.0 to 47.0 mole % of Fe compound in terms of Fe2O3, 3.0 to 16.0 mole % of Cu compound in terms of CuO, 4.0 to 39.0 mole % of Zn compound in terms of ZnO, 1.5 to 13.0 mole % of Si compound in terms of SiO2, and a residue of Ni compound; and a subcomponent including, with respect to 100 parts by weight of the main component, 0.1 to 8.0 parts by weight of Co compound in terms of Co3O4 and 0.25 to 5.00 parts by weight of Bi compound in terms of Bi2O3.

公开(公告)号：US12224104B2

公开(公告)日：2025-02-11

申请号：US17945396

申请日：2022-09-15

Applicant: TDK CORPORATION

Inventor： Shinichi Sato ,  Yohei Tadaki ,  Akihiko Oide ,  Yuma Ishikawa ,  Hidekazu Sato ,  Kazuhiro Ebina ,  Hiroyuki Tanoue

IPC: H01F27/28 ,  H01F17/00 ,  H01F27/29 ,  H01F27/32 ,  H01F41/04 ,  H01F41/12

Abstract: An electronic component includes: an element body in which a plurality of insulator layers are stacked; a coil in which a plurality of inner conductors installed in the element body are electrically connected to each other; and an outer electrode that is disposed on an outer surface of the element body, is electrically connected to the coil, and includes at least a baked electrode layer. The inner conductor connected to the outer electrode includes a connection conductor that electrically connects the baked electrode layer to the inner conductor. The connection conductor includes a protruding portion that protrudes from the outer surface of the element body to the outer electrode. The protruding portion includes a metal having a smaller diffusion coefficient than a metal of a main component included in the baked electrode layer. The inner conductors have a lower electric resistance value than the metal included in the protruding portion.

公开(公告)号：US11373789B2

公开(公告)日：2022-06-28

申请号：US16234921

申请日：2018-12-28

Applicant: TDK CORPORATION

Inventor： Takeshi Shibayama ,  Yukio Takahashi ,  Takashi Suzuki ,  Hiroyuki Tanoue ,  Masashi Shimoyasu ,  Masahiro Kato

IPC: H01F1/36 ,  H01F17/04 ,  C04B35/626 ,  H01F17/00 ,  H01F1/34 ,  C04B35/26 ,  H01F27/28 ,  H01F27/40 ,  H01F41/04

Abstract: A ferrite sintered body of the invention includes; a main component including 48.65 to 49.45 mol % of iron oxide in terms of Fe2O3, 2 to 16 mol % of copper oxide in terms of CuO, 28.00 to 33.00 mol % of zinc oxide in terms of ZnO, and a balance including nickel oxide, and a subcomponent including boron oxide in an amount of 5 to 100 ppm in terms of B2O3 with respect to 100 parts by weight of the main component, in which the ferrite sintered body includes crystal grains having an average crystal grain size of 2 to 30 μm.

公开(公告)号：US11282622B2

公开(公告)日：2022-03-22

申请号：US16727553

申请日：2019-12-26

Applicant: TDK CORPORATION

Inventor： Takeshi Shibayama ,  Takashi Suzuki ,  Takahiro Sato ,  Kenji Komorita ,  Tatsuro Suzuki ,  Yukio Takahashi ,  Hiroyuki Tanoue ,  Yasuhiro Ito

IPC: B32B9/00 ,  H01F1/34 ,  C04B35/26

Abstract: A ferrite composition includes a main component and a sub-component. The main component includes 10.0 to 38.0 mol % of a Fe compound in terms of Fe2O3, 3.0 to 11.0 mol % of a Cu compound in terms of CuO, 39.0 to 80.0 mol % (excluding 39.0 mol %) of a Zn compound in terms of ZnO, and a balance of a Ni compound. The sub-component includes 10.0 to 23.0 parts by weight of a Si compound in terms of SiO2, 0 to 3.0 parts by weight (including 0 parts by weight) of a Co compound in terms of Co3O4, and 0.1 to 3.0 parts by weight of a Bi compound in terms of Bi2O3 with respect to 100 parts by weight of the main component.

公开(公告)号：US10541078B2

公开(公告)日：2020-01-21

申请号：US15488876

申请日：2017-04-17

Applicant: TDK CORPORATION

Inventor： Shinichi Sato ,  Yohei Tadaki ,  Akihiko Oide ,  Yuma Ishikawa ,  Hidekazu Sato ,  Kazuhiro Ebina ,  Hiroyuki Tanoue

IPC: H01F5/00 ,  H01F27/28 ,  H01F27/29 ,  H01F27/32 ,  H01F41/04 ,  H01F41/12

Abstract: An electronic component includes: an element body in which a plurality of insulator layers are stacked; a coil in which a plurality of inner conductors installed in the element body are electrically connected to each other; and an outer electrode that is disposed on an outer surface of the element body, is electrically connected to the coil, and includes at least a baked electrode layer. The inner conductor connected to the outer electrode includes a connection conductor that electrically connects the baked electrode layer to the inner conductor. The connection conductor includes a protruding portion that protrudes from the outer surface of the element body to the outer electrode. The protruding portion includes a metal having a smaller diffusion coefficient than a metal of a main component included in the baked electrode layer. The inner conductors have a lower electric resistance value than the metal included in the protruding portion.