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：US20240186056A1

公开(公告)日：2024-06-06

申请号：US18525613

申请日：2023-11-30

Applicant: TDK Corporation

Inventor： Yuuichi KAWAGUCHI ,  Kazuhiro YOSHIKAWA ,  Tomonaga NISHIKAWA ,  Naoaki FUJII ,  Liyi CHEN

IPC: H01F27/28 ,  H01F27/32 ,  H01F41/04 ,  H01F41/12

CPC classification number: H01F27/2804 ,  H01F27/324 ,  H01F41/043 ,  H01F41/12

Abstract: Disclosed herein is a coil component that includes a magnetic element body, a coil pattern and a conductor post embedded in the magnetic element body, a post protective film provided between the conductor post and the magnetic element body, a cover insulating film covering a mounting surface of the magnetic element body, and a terminal electrode provided on the cover insulating film and connected to the conductor post through a first opening formed in the cover insulating film. The terminal electrode includes: a first conductor layer contacting the conductor post through the first opening and having a second opening through which a part of the conductor post is exposed; and a second conductor layer having a resistance value lower than the first conductive material, covering the first conductor layer, and contacting the part of the conductor post through the second opening.

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：US20230420184A1

公开(公告)日：2023-12-28

申请号：US18330628

申请日：2023-06-07

Applicant: TDK Corporation

Inventor： Yuuichi KAWAGUCHI ,  Naoaki FUJII ,  Tomonaga NISHIKAWA ,  Liyi CHEN ,  Rui SAKUMA

IPC: H01F41/04 ,  H01F27/32 ,  H01F17/00

CPC classification number: H01F41/041 ,  H01F27/327 ,  H01F17/0013

Abstract: Disclosed herein is a coil component that includes an element body having a mounting surface, a coil part embedded in the element body, and a first conductor post embedded in the element body. The first conductor post has a first end connected to the coil part and a second end exposed from the mounting surface. A surface of the element body on the mounting surface side has a recess from a surface of the first conductor post.

公开(公告)号：US20230420176A1

公开(公告)日：2023-12-28

申请号：US18330635

申请日：2023-06-07

Applicant: TDK Corporation

Inventor： Yuuichi KAWAGUCHI ,  Naoaki FUJII ,  Tomonaga NISHIKAWA ,  Liyi CHEN ,  Mitsuo NATORI

IPC: H01F27/28 ,  H01F41/04 ,  H01F27/24

CPC classification number: H01F27/2804 ,  H01F41/041 ,  H01F27/24 ,  H01F2027/2809

Abstract: Disclosed herein is a coil component that includes a magnetic element body, and a coil part embedded in the magnetic element body. The magnetic element body includes a first region covering the coil part from one side in a coil axis direction, a second region covering the coil part from other side in the coil axis direction, and a third region positioned in an inner diameter area of the coil part so as to connect the first and second regions. The height of the coil part in the coil axis direction decreases toward the inner diameter area.