US 12,243,670 B2
Common mode noise filter
Takuji Kawashima, Fukui (JP); Masakatsu Nawate, Osaka (JP); Yu Onodera, Fukui (JP); and Hideki Tanaka, Fukui (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/266,693
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Nov. 11, 2019, PCT No. PCT/JP2019/044177
§ 371(c)(1), (2) Date Feb. 8, 2021,
PCT Pub. No. WO2020/110692, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 2018-224312 (JP), filed on Nov. 30, 2018.
Prior Publication US 2021/0304942 A1, Sep. 30, 2021
Int. Cl. H01F 27/29 (2006.01); H01F 17/00 (2006.01); H01F 17/04 (2006.01); H01F 27/28 (2006.01); H03H 7/09 (2006.01); H03H 7/42 (2006.01)
CPC H01F 17/0013 (2013.01) [H01F 17/04 (2013.01); H01F 27/2804 (2013.01); H01F 27/292 (2013.01); H03H 7/09 (2013.01); H03H 7/427 (2013.01); H01F 2017/0073 (2013.01); H01F 2017/0093 (2013.01); H01F 2027/2809 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A common mode noise filter comprising:
a first insulator layer that includes a main surface and a back surface and has a rectangular shape as viewed in a normal direction perpendicular to the main surface;
a first conductor that is disposed on the back surface of the first insulator layer;
a second conductor that is disposed on the main surface of the first insulator layer; and
a magnetic core that passes through the first insulator layer, wherein:
the first conductor includes:
a first spiral body that is disposed at a position where at least part of the first spiral body overlaps the second conductor as viewed in the normal direction, the first spiral body beings wound around the magnetic core;
a first pad that is disposed inside the first spiral body on the back surface as viewed in the normal direction; and
a first connecting portion that connects the first spiral body and the first pad on the back surface,
the second conductor includes:
a second spiral body that is disposed at a position where at least part of the second spiral body overlaps the first conductor as viewed in the normal direction, the second spiral body being wound around the magnetic core;
a second pad that is disposed inside the second spiral body on the main surface as viewed in the normal direction; and
a second connecting portion that connects the second spiral body and the second pad on the main surface,
the first pad is disposed at a position where the first pad does not overlap the second conductor as viewed in the normal direction,
the second connecting portion is disposed at an outer side of the first pad opposite to an inner side of the first pad facing the magnetic core,
a line passing through the first pad and the second pad is parallel to one side of the rectangular shape of the first insulator layer, and
both the first pad and the second pad are disposed between the one side and the magnetic core.