公开(公告)号：US20220076876A1

公开(公告)日：2022-03-10

申请号：US17531367

申请日：2021-11-19

Applicant: TDK CORPORATION

Inventor： Hajime KATO ,  Yuto SHIGA ,  Kazuya TOBITA ,  Youichi KAZUTA ,  Yuya ISHIMA ,  Satoru OKAMOTO ,  Shunji AOKI

IPC: H01F27/28 ,  H01F27/29 ,  H01F17/00

Abstract: A laminated coil component includes an element body, a coil, and a pair of conductors, the pair of conductors is disposed on the element body. Each of the pair of conductors has an L shape when viewed from the third direction. Each of the pair of conductors includes a first conductor portion and a second conductor portion. The first conductor portion is disposed on one of first side faces. The second conductor portion is disposed on a pair of end faces. The coil includes a first coil portion and a second coil portion. The first coil portion includes a first straight portion and a pair of second straight portions. The pair of second straight portions is connected to both ends of the first straight portion. The second coil portion is curved as a whole.

公开(公告)号：US20170372829A1

公开(公告)日：2017-12-28

申请号：US15617401

申请日：2017-06-08

Applicant: TDK CORPORATION

Inventor： Yuusuke NAGAI ,  Takashi SUZUKI ,  Kouichi KAKUDA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Shinichi SATO ,  Masaki TAKAHASHI ,  Takashi ENDO

IPC: H01F27/255 ,  H01F27/28

CPC classification number: H01F27/255 ,  H01F5/00 ,  H01F17/0013 ,  H01F17/0033

Abstract: A multilayer coil component includes an element body including soft magnetic metal powders and a coil disposed in the element body. The coil includes a plurality of internal conductors electrically connected to each other. The plurality of internal conductors are separated from each other in a first direction and are adjacent to each other in the first direction. An average particle diameter of the soft magnetic metal powders located at an inner side of the coil when viewing from the first direction is larger than an average particle diameter of the soft magnetic metal powders located between the internal conductors adjacent to each other in the first direction.

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：US20220293339A1

公开(公告)日：2022-09-15

申请号：US17686599

申请日：2022-03-04

Applicant: TDK CORPORATION

Inventor： Yuya ISHIMA ,  Shinichi KONDO ,  Kosuke ITO ,  Shingo HATTORI

IPC: H01F41/04 ,  H01F41/12 ,  G03F7/00

Abstract: A method for manufacturing a multilayer coil component 1 includes forming a plurality of insulator layers by a photolithography method using a photosensitive insulator paste, forming a plurality of conductors and via conductors by a photolithography method using a photosensitive conductive paste, a step of forming a first conductor, a step of forming a first insulator layer around the first conductor such that it becomes even with an upper surface of the first conductor, a step of forming a second insulator layer provided with a via hole on the first conductor and the first insulator layer, and a step of forming a second conductor connected to the first conductor via the via hole on the second insulator layer.

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：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：US20180330855A1

公开(公告)日：2018-11-15

申请号：US16026193

申请日：2018-07-03

Applicant: TDK CORPORATION

Inventor： Takahiro SATO ,  Yuya ISHIMA ,  Shusaku UMEMOTO ,  Takashi SUZUKI ,  Satoru OKAMOTO ,  Yoshikazu SAKAGUCHI

IPC: H01F5/06 ,  H01F17/00

CPC classification number: H01F5/06 ,  H01F17/0013 ,  H01F2017/004

Abstract: A laminated coil component includes an element assembly formed by laminating a plurality of insulation layers and a coil unit formed inside the element assembly by a plurality of coil conductors. The element assembly includes a coil unit arrangement layer which has the coil unit arranged therein, and at least a pair of shape retention layers which is provided to have the coil unit arrangement layer interposed therebetween to retain a shape of the coil unit arrangement layer. The shape retention layer is made from glass-ceramic containing SrO, and a softening point of the coil unit arrangement layer is lower than a softening point or a melting point of the shape retention layer.

公开(公告)号：US20240079177A1

公开(公告)日：2024-03-07

申请号：US18359419

申请日：2023-07-26

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Kazuhiro EBINA ,  Takahiro SATO ,  Masaki TAKAHASHI ,  Takashi ENDO ,  Yuya ISHIMA ,  Kosuke ITO ,  Takuya MIYASHITA

IPC: H01F27/29 ,  H01F17/00

CPC classification number: H01F27/292 ,  H01F17/0013 ,  H01F2017/0066

Abstract: A multilayer coil component includes an element body, a plurality of coil conductors, a first resistive layer, and a second resistive layer. The plurality of coil conductors are disposed in the element body and electrically connected to each other. The plurality of coil conductors include a first coil conductor and a second coil conductor adjacent to each other. The first resistive layer and the second resistive layer oppose each other between the first coil conductor and the second coil conductor. The first resistive layer is in contact with the first coil conductor.

公开(公告)号：US20190096561A1

公开(公告)日：2019-03-28

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 ,  H01F27/34 ,  H01F41/04 ,  H01F17/04

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.