公开(公告)号：US20210280353A1

公开(公告)日：2021-09-09

申请号：US17189835

申请日：2021-03-02

Applicant: TDK CORPORATION

Inventor： Masaki ENDO ,  Tomonaga NISHIKAWA ,  Masaki YONEYAMA ,  Liyi CHEN ,  Azuma SATOH

IPC: H01F27/28 ,  H01F27/29 ,  H01F27/24

Abstract: Disclosed herein is a coil component that includes a a coil area in which first to third coil patterns are disposed and a terminal area positioned outside the coil area. The outer peripheral end of the first coil pattern is connected to the first terminal electrode. The inner peripheral end of the first coil pattern is connected to an inner peripheral end of the second coil pattern. The outer peripheral end of the second coil pattern is connected to an outer peripheral end of the third coil pattern. A via conductor connecting the outer peripheral ends of the second and third coil patterns is disposed at a position overlapping the terminal area.

公开(公告)号：US20230238170A1

公开(公告)日：2023-07-27

申请号：US18157955

申请日：2023-01-23

Applicant: TDK Corporation

Inventor： Yuuichi KAWAGUCHI ,  Mitsuo NATORI ,  Azuma SATOH

IPC: H01F27/29 ,  H01F17/00 ,  H01F41/04 ,  H01F17/04

CPC classification number: H01F27/292 ,  H01F17/0013 ,  H01F41/041 ,  H01F17/04 ,  H01F2017/0073 ,  H01F2017/0066 ,  H01F2017/048

Abstract: Disclosed herein is a coil component that includes: a coil part having a structure in which alternately stacking a plurality of conductor layers each including a spiral coil pattern and a plurality of insulating layers; a first magnetic layer disposed in an inner diameter area of the coil part, in an outside area of the coil part, and on one side in an axial direction of the coil part; and a second magnetic layer disposed on other side in the axial direction of the coil part. Each of the first and second magnetic layers comprises a composite magnetic material containing magnetic fillers and binder resin. The content of the magnetic filers in the first magnetic layer is higher than the content of the magnetic fillers in the second magnetic layer.

公开(公告)号：US20240203639A1

公开(公告)日：2024-06-20

申请号：US18537468

申请日：2023-12-12

Applicant: TDK Corporation

Inventor： Yuuichi KAWAGUCHI ,  Hironori SATO ,  Azuma SATOH ,  Liyi CHEN

IPC: H01F27/32 ,  H01F27/29 ,  H01F41/12

CPC classification number: H01F27/324 ,  H01F27/29 ,  H01F41/12

Abstract: Disclosed herein is a coil component that includes a magnetic element body having a mounting surface, a coil pattern embedded in the magnetic element body, a conductor post embedded in the magnetic element body, the conductor post having a first end connected to the coil pattern and a second end, and a terminal electrode connected to the second end of the conductor post through an opening formed in the cover insulating film. The second end of the conductor post is flush with a surface of the cover insulating film.

公开(公告)号：US20230352234A1

公开(公告)日：2023-11-02

申请号：US18245408

申请日：2021-09-07

Applicant: TDK Corporation

Inventor： Yuuichi KAWAGUCHI ,  Mitsuo NATORI ,  Azuma SATOH ,  Naoaki FUJII ,  Tomonaga NISHIKAWA

IPC: H01F27/32 ,  H01F27/02 ,  H01F27/28 ,  H01F27/255 ,  H01F41/00 ,  H01F41/12

CPC classification number: H01F27/327 ,  H01F27/022 ,  H01F27/2852 ,  H01F27/255 ,  H01F27/323 ,  H01F41/005 ,  H01F41/122 ,  H01F41/127

Abstract: A coil component includes: a magnetic element body made of resin containing conductive magnetic powder; a coil part 20 obtained by alternately stacking a plurality of conductor layers and a plurality of interlayer insulating layers, the plurality of conductor layers respectively including coil conductor patterns embedded in the magnetic element body and electrode patterns exposed from the magnetic element body; external terminals provided respectively on the electrode patterns and electrode patterns; and a protective insulating layer covering the magnetic element body in such a manner as to expose the external terminals therethrough. The magnetic element body is thus covered with the protective insulating layer, so that it is possible to prevent adhesion of plating to an unnecessary portion and exposure of the coil conductor patterns even when the surfaces of the external terminals are subjected to electrolytic plating.