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：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：US10825611B1

公开(公告)日：2020-11-03

申请号：US16930668

申请日：2020-07-16

Applicant: TDK CORPORATION

Inventor： Tomohisa Fukuoka ,  Tetsuhiro Takahashi ,  Akinori Ohi

IPC: H01G4/00 ,  H01G4/30 ,  H01G4/248 ,  H01G4/012 ,  H05K1/18 ,  H05K1/11 ,  H01G4/12

Abstract: To improve a mounting reliability while maintaining a thickness of the external electrode at a side face of a multilayer electronic component thin. The multilayer electronic component includes ceramic body in which ceramic layers and an external electrode formed to an end face of the ceramic body. The upper electrode layer includes an element having higher standard electrode potential than Cu. The external electrode includes an external electrode end part and an external electrode extension part which is integrally formed with the external electrode end part. 1.20≤t2/t1≤4.50 is satisfied in which t1 is a total thickness of a thickness of the intermediate electrode layer thickness and t2 is a length from an end of the base electrode layer to an end of the upper electrode layer along the first axis of the external electrode extension part connected by the conductive adhesive.