公开(公告)号：US20230298787A1

公开(公告)日：2023-09-21

申请号：US18185101

申请日：2023-03-16

Applicant: TDK CORPORATION

Inventor： Yu SAKURAI ,  Hidenobu Umeda ,  Hideyuki Itoh ,  Ryuichi Wada ,  Kouichi Kakuda

IPC: H01F1/147

CPC classification number: H01F1/14733 ,  H01F27/28

Abstract: A soft magnetic metal particle comprises an Fe—Ni based soft magnetic metal. The soft magnetic metal particle includes both an fcc phase and a bcc phase. A magnetic element body includes the soft magnetic metal particle. A coil-type electronic component includes the magnetic element body and a coil conductor.

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：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：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％。

公开(公告)号：US11302466B2

公开(公告)日：2022-04-12

申请号：US16199047

申请日：2018-11-23

Applicant: TDK CORPORATION

Inventor： Takashi Suzuki ,  Hidekazu Sato ,  Yusuke Nagai ,  Kouichi Kakuda ,  Kunihiko Kawasaki ,  Shinichi Kondo ,  Yuya Ishima ,  Shinichi Sato ,  Masaki Takahashi ,  Takashi Endo

IPC: H01F1/147 ,  H01F1/33 ,  H01F27/28 ,  H01F17/04 ,  H01F17/00 ,  H01F1/24 ,  H01F1/26 ,  H01F27/29 ,  H01F27/255

Abstract: A multilayer coil electronic component having improved inductance L, Q, and strength, and which has an element in which a coil conductor and a magnetic element body are stacked. The magnetic element body includes soft magnetic metal particles and a resin. The resin fills a space between the soft magnetic metal particles. Each of soft magnetic metal particles has a soft magnetic metal particle core and an oxide film covering the soft magnetic metal particle core. A layer of the oxide film contacting the soft magnetic metal particle core is made of an oxide including Si.

公开(公告)号：US10818422B2

公开(公告)日：2020-10-27

申请号：US15895567

申请日：2018-02-13

Applicant: TDK CORPORATION

Inventor： Yuusuke Nagai ,  Takashi Suzuki ,  Kouichi Kakuda ,  Kunihiko Kawasaki ,  Shinichi Kondo ,  Yuya Ishima ,  Shinichi Sato ,  Masaki Takahashi ,  Takashi Endo

IPC: H01F27/30 ,  H01F17/00 ,  H01F27/29

Abstract: In a multilayer coil component, an end of a lower coil layer and an end of a connecting part are directly overlapped, and the end of the lower coil layer includes a contact edge positioned on a side of the connecting part and being in contact with the connecting part and a non-contact edge positioned on a side opposite to the connecting part and not being in contact with the connecting part. Then, the contact edge and the non-contact edge are not overlapped when viewed from a laminated direction. Consequently, a propagation distance of a crack becomes longer as compared with the case where an end face is parallel to the laminated direction, effectively suppressing advance of the crack. Suppressed advance of a crack in this manner makes the multilayer coil component provide a high component strength as a whole.

公开(公告)号：US10607756B2

公开(公告)日：2020-03-31

申请号：US15618493

申请日：2017-06-09

Applicant: TDK CORPORATION

Inventor： Takashi Suzuki ,  Hidekazu Sato ,  Yuusuke Nagai ,  Kouichi Kakuda ,  Kunihiko Kawasaki ,  Shinichi Kondo ,  Yuya Ishima ,  Shinichi Sato ,  Masaki Takahashi ,  Takashi Endo

IPC: H01F1/147 ,  H01F17/00 ,  H01F17/04 ,  H01F27/255 ,  H01F27/28

Abstract: A soft magnetic metal powder includes a plurality of soft magnetic metal grains composed of an Fe—Si based alloy. A content of P in the Fe—Si based alloy is 110 to 650 ppm provided that a total content of Fe and Si is 100 mass %. A soft magnetic metal fired body includes soft magnetic metal fired grains composed of an Fe—Si based alloy. A content of P in the Fe—Si based alloy is 110 to 650 ppm provided that a total content of Fe and Si is 100 mass %.

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 %.