公开(公告)号：US20220306541A1

公开(公告)日：2022-09-29

申请号：US17699972

申请日：2022-03-21

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Takashi SUZUKI ,  Yukio TAKAHASHI ,  Kunihiko KAWASAKI ,  Hiroyuki TANOUE ,  Takehiro ISHII ,  Takuya NIIBORI ,  Takahiro SATO ,  Akihiko OIDE ,  Yasuhiro ITO ,  Takashi ENDO ,  Kunio ODA

IPC: C04B35/26

Abstract: A ferrite composition comprises a main component and a subcomponent. The main component includes 32.0 to 46.4 mol % of iron oxide in terms of Fe2O3, 4.4 to 14.0 mol % of copper oxide in terms of CuO, and 8.4 to 56.9 mol % of zinc oxide in terms of ZnO. The subcomponent includes 0.53 to 11.00 parts by weight of a silicon compound in terms of SiO2, 0.1 to 12.8 parts by weight of a tin compound in terms of SnO2, and 0.5 to 7.0 parts by weight of a bismuth compound in terms of Bi2O3, with respect to 100 parts by weight of the main component.

公开(公告)号：US20190221344A1

公开(公告)日：2019-07-18

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 ,  H01F27/28 ,  H01F41/04 ,  H01F27/40 ,  C04B35/26

CPC classification number: H01F1/36 ,  C04B35/265 ,  C04B2235/3244 ,  C04B2235/3274 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/786 ,  C04B2235/96 ,  H01F27/2804 ,  H01F27/40 ,  H01F41/043 ,  H01F2027/2809

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：US20180057408A1

公开(公告)日：2018-03-01

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: C04B35/26 ,  H01F1/34 ,  H01F17/00 ,  H01F41/02

CPC classification number: C04B35/265 ,  C01G53/006 ,  C01P2006/40 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/5445 ,  H01F1/344 ,  H01F17/0013 ,  H01F17/04 ,  H01F41/0246

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：US20160293302A1

公开(公告)日：2016-10-06

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: H01F1/03 ,  H03H7/01 ,  H01F38/14 ,  H01F27/255 ,  H01F27/28

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.

Abstract translation: 提供一种铁素体组合物，其由以下组成的铁素体组合物构成：主要成分为以Fe 2 O 3计，Fe化合物23.0〜47.0摩尔％，CuO换算为3.0〜16.0摩尔％的Cu化合物，以ZnO计为4.0〜39.0摩尔％的Zn化合物 ，1.5〜13.0摩尔％的Si化合物，以SiO 2计，残留的Ni化合物; 和相对于100重量份的主成分的副成分，以Co 3 O 4换算为0.1〜8.0重量份的Co化合物，以Bi 2 O 3换算为0.25〜5.00重量份的Bi化合物。

公开(公告)号：US20230005656A1

公开(公告)日：2023-01-05

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：US20200243239A1

公开(公告)日：2020-07-30

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: 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：US20230402211A1

公开(公告)日：2023-12-14

申请号：US18330073

申请日：2023-06-06

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Yuya OSHIMA ,  Kenji KOMORITA ,  Shigeshi OSAWA ,  Shinichi KONDO ,  Hiroyuki TANOUE ,  Kaori SASAKI ,  Takuya NIIBORI ,  Yukio TAKAHASHI ,  Hidenobu UMEDA

IPC: H01F1/34 ,  C04B35/26

CPC classification number: H01F1/344 ,  C04B35/265 ,  C04B2235/3274 ,  C04B2235/3293 ,  C04B2235/3277 ,  C04B2235/3298

Abstract: A ferrite composition includes a main component and a sub component. The main component includes an iron oxide in terms of Fe2O3, a copper oxide in terms of CuO, a zinc oxide in terms of ZnO, and a nickel oxide as its remainder. The sub component includes a cobalt oxide in terms of Co3O4, a tin oxide in terms of SnO2, and a bismuth oxide in terms of Bi2O3. A is −3.5 or more and 1.0 or less, provided that A=(α−18)/β; is defined, in which α is an amount of the zinc oxide represented by mol % in terms of ZnO in the main component, and β is an amount of the cobalt oxide represented by parts by weight in terms of Co3O4 with respect to 100 parts by weight of the main component.

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

IPC: H01F27/29 ,  H01F27/28

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.

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

IPC: H01F27/28 ,  H01F1/34

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.

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

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

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.