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：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：US10074476B2

公开(公告)日：2018-09-11

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

IPC: C04B35/30 ,  H01F41/02 ,  C04B35/26 ,  H01F1/34 ,  H01F27/28

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.

公开(公告)号：US09905365B2

公开(公告)日：2018-02-27

申请号：US15215237

申请日：2016-07-20

Applicant: TDK CORPORATION

Inventor： Kouichi Kakuda ,  Takashi Suzuki ,  Masaki Takahashi ,  Yukio Takahashi ,  Shinichi Kondo ,  Asuka Murai ,  Akihiko Oide ,  Naoki Uchida ,  Hidekazu Sato

IPC: H01G4/40 ,  H01F1/03 ,  C04B35/47 ,  C04B35/462 ,  C04B35/453 ,  B32B18/00 ,  C04B35/26 ,  H01F1/34 ,  H01F17/00 ,  H01F27/255

CPC classification number: H01G4/40 ,  B32B18/00 ,  C04B35/265 ,  C04B35/453 ,  C04B35/462 ,  C04B35/47 ,  C04B2235/3232 ,  C04B2235/3236 ,  C04B2235/3262 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3409 ,  C04B2235/365 ,  C04B2235/6025 ,  C04B2237/34 ,  C04B2237/346 ,  H01F1/0306 ,  H01F1/0315 ,  H01F1/344 ,  H01F17/0013 ,  H01F27/255 ,  H01F2017/0026

Abstract: Composite electronic including coil, capacitor and intermediate parts, wherein coil part includes coil-conductor and magnetic-layer, capacitor part includes internal electrodes and dielectric-layer, which contains SrO—TiO2 or ZnO—TiO2 based oxide, intermediate part between coil and capacitor parts, intermediate part includes intermediate material layer, which contains ZnO, TiO2 and boron, ZnO contained in intermediate material layer 50-85 parts by mole and TiO2 contained the intermediate material layer 15-50 parts by mole when total content of ZnO and TiO2 in intermediate material layer is 100 parts by mole, content boron in intermediate material layer is 0.1-5.0 parts by weight of B2O3 when total of ZnO and TiO2 in intermediate material layer set to 100 parts by weight, part of ZnO and TiO2 intermediate material layer constitute ZnO—TiO2 compound, which in intermediate material layer is 50 wt % or more when total weight of ZnO and TiO2 in intermediate material layer is set to 100 wt %.