US 12,080,469 B2
Common-mode choke coil
Kouhei Matsuura, Nagaokakyo (JP); Atsuo Hirukawa, Nagaokakyo (JP); and Hiroshi Ueki, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Feb. 2, 2021, as Appl. No. 17/165,621.
Claims priority of application No. 2020-017323 (JP), filed on Feb. 4, 2020.
Prior Publication US 2021/0241969 A1, Aug. 5, 2021
Int. Cl. H01F 27/29 (2006.01); H01F 17/00 (2006.01)
CPC H01F 27/292 (2013.01) [H01F 17/0013 (2013.01); H01F 2017/0093 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A common-mode choke coil comprising:
a multilayer body including a plurality of non-conductor layers, the plurality of non-conductor layers being stacked and each made of a non-conductor;
a first coil and a second coil that are incorporated in the multilayer body, the first coil having a first end and a second end which are different ends of the first coil, the second coil having a third end and a fourth end which are different ends of the second coil, the first coil having a path length L1, the second coil having a path length L2, and a sum of the path length L1 and the path length L2 being less than or equal to 3.5 mm;
a first terminal electrode and a second terminal electrode that are provided on an outer surface of the multilayer body, the first terminal electrode being electrically connected to the first end, and the second terminal electrode being electrically connected to a second end;
a third terminal electrode and a fourth terminal electrode that are provided on an outer surface of the multilayer body, the third terminal electrode being electrically connected to the third end, and the fourth terminal electrode being electrically connected to a fourth end; and
the first coil having a first shape including at least one first curvilinear part, the first coil extending from the first end to the second end as viewed in a direction perpendicular to a plane in which the first coil is positioned, the second coil having a second shape including at least one second curvilinear part, the second coil extending from the third end to the fourth end as view in the direction perpendicular to the plane in which the first coil is positioned, and the first shape is different from the second shape.