公开(公告)号：US20180286558A1

公开(公告)日：2018-10-04

申请号：US15894536

申请日：2018-02-12

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Daizo YOKOYAMA ,  Koji TAKETOMI ,  Kenichiro NOGI ,  Hidemi IWAO

IPC: H01F27/24 ,  H01F27/28 ,  H03H1/00

Abstract: In a common mode choke coil having a magnetic core, a decrease in peak value of a common mode impedance in a vicinity of its resonance frequency is suppressed. A common mode choke coil includes a non-magnetic layer, a first magnetic layer formed on a top surface of the non-magnetic layer, a second magnetic layer formed on a bottom surface of the non-magnetic layer, a magnetic core provided between the first magnetic layer and the second magnetic layer so that its axis extends in a top-bottom direction, a first coil conductor embedded in the non-magnetic layer and wound around the magnetic core, a second coil conductor embedded in the non-magnetic layer and wound around the magnetic core, and a first magnetic gap provided between a top surface of the magnetic core and a bottom surface of the first magnetic layer. The magnetic core is made of a ferrite material.