公开(公告)号：US20220139609A1

公开(公告)日：2022-05-05

申请号：US17512790

申请日：2021-10-28

Applicant: TDK CORPORATION

Inventor： Kyosuke INUI ,  Yuichi OYANAGI ,  Toru TONOGAI ,  Toshiyuki ANBO

IPC: H01F27/29 ,  H01F17/04

Abstract: A coil device including: a core containing magnetic particles and a resin component; a coil including a conductor having a coil shape; and a terminal electrode formed on a part of an outer surface of the core and electrically connected to an end of the conductor drawn from the coil. The terminal electrode includes a first electrode layer in contact with the end of the conductor and a second electrode layer located outside the first electrode layer. The first electrode layer and the second electrode layer both include conductive powder and resin, and a content of the resin in the second electrode layer is higher than a content of the resin in the first electrode layer.

公开(公告)号：US20210358683A1

公开(公告)日：2021-11-18

申请号：US17320402

申请日：2021-05-14

Applicant: TDK CORPORATION

Inventor： Kyosuke INUI ,  Makoto MORITA ,  Takashi KUDO ,  Toshiyuki ANBO ,  Kyohei TONOYAMA ,  Fuyuki MIURA ,  Masanori SUGAI ,  Eietsu ABE ,  Toru TONOGAI ,  Yuichi OYANAGI

IPC: H01F27/29 ,  H01F27/28

Abstract: An electronic component according to the present invention includes: a leadout electrode portion provided on an outer surface of an element main body; and a resin electrode layer formed at a part of the outer surface of the element main body and connected to the leadout electrode portion. The leadout electrode portion contains copper as a main component, and the resin electrode layer includes a conductor powder containing silver, and a resin. Further, a diffusion layer containing copper oxide and silver is formed at an interface between the leadout electrode portion and the resin electrode layer.