公开(公告)号：US20200303108A1

公开(公告)日：2020-09-24

申请号：US16603584

申请日：2018-07-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MASAKATSU NAWATE ,  ATSUSHI SHINKAI ,  HIDEKI TANAKA ,  TAKUJI KAWASHIMA ,  TAKESHI ICHIHARA

IPC: H01F17/00 ,  H01F41/04 ,  H01F41/12 ,  H01F27/32

Abstract: A common mode noise filter includes an insulating layer, a first coil conductor disposed on a first surface of the insulating layer and extending slenderly, and a second coil conductor disposed on a second surface of the insulating layer and extending slenderly. The second coil conductor faces the first coil conductor across the insulating layer. A portion of the second coil conductor has a cross section crossing a direction in which the portion of the second coil conductor extends slenderly. The cross section includes an apex portion facing the first coil conductor across the insulating layer and a base side portion opposite to the apex portion. A width of the apex portion is smaller than a width of the base-side portion. The common mode noise filter reduces attenuation of differential signals in high frequencies.

公开(公告)号：US20210304942A1

公开(公告)日：2021-09-30

申请号：US17266693

申请日：2019-11-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAKUJI KAWASHIMA ,  MASAKATSU NAWATE ,  YU ONODERA ,  HIDEKI TANAKA

IPC: H01F17/00 ,  H01F27/28 ,  H01F27/29 ,  H01F17/04 ,  H03H7/09 ,  H03H7/42

Abstract: An object of the present disclosure is to provide a common mode noise filter that can be used in a high-frequency band. The common mode noise filter of the present disclosure includes first to fifth insulator layers and stacked body in which first to fifth insulator layers are stacked along a vertical direction. The common mode noise filter further includes first spiral conductor and second spiral conductor that are formed inside stacked body and face each other across first insulator layer. The common mode noise filter further includes first pad connected to an inner end of first spiral conductor and second pad connected to an inner end of second spiral conductor. Neither first pad nor second pad overlaps each of first spiral conductor and second spiral conductor in top view.

公开(公告)号：US20180041185A1

公开(公告)日：2018-02-08

申请号：US15549391

申请日：2015-12-07

Applicant: Panasonic intellectual Property Management Co. Ltd.

Inventor： YOSHIHARU OMORI ,  KENICHI MATSUSHIMA ,  MASAKATSU NAWATE ,  RYOHEI HARADA ,  KENJI UENO

IPC: H03H7/42

CPC classification number: H03H7/427 ,  H01F17/0013 ,  H01F2017/0093 ,  H03H2001/0085

Abstract: A common mode noise filter includes first to fourth insulator layers stacked in a stacking direction and first to third coils provided on the first to fourth insulator layers independently of one another. The first coil includes a first coil conductor provided on the first insulator layer and a second coil conductor provided on the fourth insulator layer and connected to the first coil conductor. The second coil is provided on the second insulator layer. The third coil is provided on the third insulator layer. The first coil conductor overlaps the second coil viewing from above. At least a part of the second coil overlaps at least a part of the third coil viewing from above. The second coil conductor overlaps the third coil viewing from above.