公开(公告)号：US20170345560A1

公开(公告)日：2017-11-30

申请号：US15605623

申请日：2017-05-25

Applicant: TDK CORPORATION

Inventor： TOSHIO TOMONARI ,  TSUTOMU KOBAYASHI ,  EMI ITO ,  YUMA KOMAYA

IPC: H01F27/38 ,  H03H1/00 ,  H03H7/42 ,  H05K1/11 ,  H01F27/28 ,  H01F27/29 ,  H05K1/18

CPC classification number: H03H7/427 ,  H01F27/2823 ,  H01F27/29 ,  H01F27/292 ,  H01F27/38 ,  H01F2017/0093 ,  H03H1/00 ,  H03H2001/0085 ,  H03H2001/0092 ,  H05K1/0225 ,  H05K1/0233 ,  H05K1/0245 ,  H05K1/111 ,  H05K1/181 ,  H05K2201/1003 ,  H05K2201/1006

Abstract: Disclosed herein is an electronic circuit module that includes a circuit board and a common mode filter mounted on the circuit board. The common mode filter includes first and second terminal electrodes constituting a first pair of terminal electrodes and third and fourth electrodes constituting a second pair of terminal electrodes. The circuit board includes: a first wiring layer having first, second, third, and fourth land patterns connected to the first, second, third, and fourth terminal electrodes, respectively, and first, second, third, and fourth wiring patterns connected to the first, second, third, and fourth land patterns, respectively; and a second wiring layer having a ground pattern that overlaps the first, second, third, and fourth wiring patterns without overlapping the first and second land patterns.