公开(公告)号：US20230125854A1

公开(公告)日：2023-04-27

申请号：US17970182

申请日：2022-10-20

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Takahiro SATO ,  Kunihiko KAWASAKI ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Kouichi KAKUDA ,  Mitsuharu KOIKE ,  Keito YASUDA ,  Takato SASAKI

IPC: H01F5/04 ,  H01F1/14

Abstract: A stacked coil component includes: an element body, a coil disposed inside the element body; and a first outer electrode and a second outer electrode which are disposed in the element body. Each of the first outer electrode and the second outer electrode includes an electrode portion which includes a joining surface joined to the element body, and a plating surface opposite to the joining surface and is formed by plating, and of which at least a part is embedded in the element body.

公开(公告)号：US20220336128A1

公开(公告)日：2022-10-20

申请号：US17760951

申请日：2020-09-25

Applicant: TDK CORPORATION

Inventor： Takashi SUZUKI ,  Yu SAKURAI ,  Hideyuki ITOH ,  Kouichi KAKUDA ,  Ryuichi WADA ,  Nami ENOMOTO ,  Yusuke NAGAI ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA

IPC: H01F1/147 ,  C22C30/00 ,  B22F1/05 ,  B22F1/16

Abstract: A soft magnetic metal powder or the like from which a soft magnetic metal fired body can be provided has a high magnetic permeability μ and a specific resistance ρ and is contained in a coil-type electronic component having sufficiently high inductance L and Q value and unlikely to be plating-extended and short-circuited. A soft magnetic metal powder contains soft magnetic metal particles containing at least Fe and Ni. Said soft magnetic metal powder further contains P, Si, Cr and/or M. M is at least one selected from among B, Co, Mn, Ti, Zr, Hf, Nb, Ta, Mo, Mg, Ca, Sr, Ba, Zn, Al, and rare earth elements. The content of each element is within a predetermined range.

公开(公告)号：US20220262558A1

公开(公告)日：2022-08-18

申请号：US17570002

申请日：2022-01-06

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Hidekazu SATO ,  Kunihiko KAWASAKI

IPC: H01F27/28

Abstract: A laminated coil component capable of improving winding efficiency and characteristics and realizing a simple configuration and an improved withstand voltage is provided. A laminated coil component includes a coil portion formed inside an insulating element body forming a laminated structure and in a first conductor pattern layer and a second conductor pattern layer constituting the coil portion, positions of a pair of end portions of an outer conductor line and a pair of end portions of an inner conductor line facing each other with a division region interposed therebetween are displaced in a line direction of the coil portion passing through the division region.

公开(公告)号：US20220181073A1

公开(公告)日：2022-06-09

申请号：US17523202

申请日：2021-11-10

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Kouichi KAKUDA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Masaki TAKAHASHI ,  Takahiro SATO ,  Keito YASUDA ,  Shingo HATTORI

IPC: H01F27/29 ,  H01F17/00 ,  H01F17/04

Abstract: In a multilayer coil component, a coil is configured by electrically connecting coil conductors respectively provided in magnetic body layers constituting an element body and metal magnetic particles have a normal particle having an ellipsoidal shape and flat particles having an ellipsoidal shape flatter in a thickness direction than the normal particle. A plurality of the normal particles and at least one of the flat particles disposed such that a surface (reference surface) including a major axis direction orthogonal to the thickness direction and a minor axis direction is along the forming surface of the coil conductor in the magnetic body layer are arranged in the lamination direction of the magnetic body layers between the coil conductors.

公开(公告)号：US20220108835A1

公开(公告)日：2022-04-07

申请号：US17490411

申请日：2021-09-30

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Takashi SUZUKI ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Shinichi SATO ,  Seiichi NAKAGAWA ,  Keito YASUDA ,  Ryuichi WADA

IPC: H01F27/29 ,  H01F1/28

Abstract: A multilayer coil component includes: an element body containing a plurality of metal magnetic particles; a coil disposed in the element body; and an external electrode disposed on a surface of the element body and electrically connected to the coil. At least a part of a void part between the metal magnetic particles in the element body is filled with a first resin, the external electrode has a resin electrode containing a second resin and a conductor powder dispersed in the second resin, and the second resin connected from the resin electrode extends into the element body.

公开(公告)号：US20200303110A1

公开(公告)日：2020-09-24

申请号：US16817046

申请日：2020-03-12

Applicant: TDK CORPORATION

Inventor： Shinichi SATO ,  Takahiro SATO ,  Yusuke NAGAI ,  Mitsuharu KOIKE ,  Kazuhiro MIURA ,  Seiichi NAKAGAWA ,  Shinichi KONDO ,  Takashi SUZUKI

IPC: H01F17/00 ,  H01F1/24

Abstract: A multilayer coil component includes an element body including a plurality of metal magnetic particles, and a plurality of coil conductors. The plurality of coil conductors is disposed in the element body. The plurality of coil conductors is separated from each other in a predetermined direction and electrically connected to each other. The plurality of coil conductors includes one pair of side surfaces opposing each other in the predetermined direction. Surface roughness of the one pair of side surfaces is less than 40% of an average particle size of the plurality of metal magnetic particles.

公开(公告)号：US20190198210A1

公开(公告)日：2019-06-27

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 ,  H01F27/28 ,  H01F1/33

CPC classification number: H01F1/14766 ,  H01F1/33 ,  H01F27/2804 ,  H01F2027/2809

Abstract: The present invention provides a multilayer coil electronic component having improved inductance L, Q, and strength. The multilayer coil electronic component 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：US20150102254A1

公开(公告)日：2015-04-16

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: H01F1/01 ,  H01F27/28

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％，氧化铋换算为氧化铋为0.21〜3.00重量％。