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：US20160049234A1

公开(公告)日：2016-02-18

申请号：US14784031

申请日：2014-04-16

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： TAKUJI KAWASHIMA ,  YOSHIHARU OMORI ,  HIDEKI TANAKA

IPC: H01F27/28 ,  H01F41/04

CPC classification number: H01F27/2804 ,  H01F17/0013 ,  H01F27/292 ,  H01F41/041 ,  H01F2017/002 ,  H01F2017/0093

Abstract: A common mode noise filter includes: a laminated body; and a first and second coil conductors that are formed inside the laminated body and face each other in a first direction, wherein the first coil conductor has a first surface facing the second coil conductor; the second coil conductor has a second surface facing the first surface; a distance between ends of the first and second surfaces in the first direction is longer than a distance between centers of the first and second surfaces in the first direction; the first and second surfaces have corners each formed into an arcuate shape in a cross section; and a relationship between a height h in the first direction and a width w in a second direction perpendicular to the first direction is h≧w in a cross section of each of the first and second coil conductors.

Abstract translation: 共模噪声滤波器包括：层叠体; 以及第一和第二线圈导体，其形成在所述层叠体内并且在第一方向上彼此面对，其中所述第一线圈导体具有面向所述第二线圈导体的第一表面; 所述第二线圈导体具有面向所述第一表面的第二表面; 所述第一和第二表面的所述第一方向的端部之间的距离比所述第一和第二表面的所述第一方向的中心之间的距离长; 第一表面和第二表面在横截面中形成为弧形; 并且在第一和第二线圈导体的每一个的截面中，第一方向上的高度h与垂直于第一方向的第二方向的宽度w之间的关系为h≥w。

公开(公告)号：US20210028752A1

公开(公告)日：2021-01-28

申请号：US17040362

申请日：2019-03-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAKUJI KAWASHIMA ,  NARIAKI ISHIDA ,  HIDEKI TANAKA

IPC: H03H7/42 ,  H03H1/00 ,  H01F17/00

Abstract: The present disclosure provides a common mode noise filter that can improve attenuation characteristics of common mode noise over a wide frequency range. The common mode noise filter of the present disclosure includes: two magnetic sections and each of which is made of a magnetic material; and non-magnetic section disposed between magnetic sections in a stacking direction, non-magnetic section being made of a non-magnetic material. Moreover, the common mode noise filter further includes two coils and metal layer. Coils are disposed inside non-magnetic section while facing each other. Metal layer is formed inside at least one of two magnetic sections while being connected to the ground. Metal layers are positioned closer to a lower surface of magnetic section than an upper surface of magnetic section and closer to an upper surface of magnetic section than a lower surface of magnetic section.

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：US20180336987A1

公开(公告)日：2018-11-22

申请号：US15771385

申请日：2017-09-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAKUJI KAWASHIMA ,  YOSHIHARU OOMORI ,  YOICHI NAGASO ,  ATSUSHI SHINKAI

IPC: H01F17/00

CPC classification number: H01F17/00 ,  H01F27/00

Abstract: A common mode noise filter includes a non-magnetic body and first to third coil conductors provided inside the non-magnetic body. The second coil conductor is provided in a downward direction from the first coil conductor. The third coil conductor is provided in the downward direction from the second coil conductor. The first and third coil conductors deviate in a direction perpendicular to the downward direction with respect to the second coil conductor. At least one of the first and third coil conductors overlaps the second coil conductor viewing from the direction perpendicular to the downward direction. This common mode noise filter allows these coil conductors to be magnetically coupled to each other with a preferable balance, thereby preventing degradation of differential signals.