US 12,327,672 B2
Coil component and method of manufacturing the same
Hirotaka Wakabayashi, Tokyo (JP)
Assigned to TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed by TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed on Feb. 26, 2021, as Appl. No. 17/187,155.
Claims priority of application No. 2020-034486 (JP), filed on Feb. 29, 2020; and application No. 2020-184044 (JP), filed on Nov. 4, 2020.
Prior Publication US 2021/0272740 A1, Sep. 2, 2021
Int. Cl. H01F 27/29 (2006.01); H01F 27/28 (2006.01); H01F 41/04 (2006.01)
CPC H01F 27/29 (2013.01) [H01F 27/2804 (2013.01); H01F 41/041 (2013.01); H01F 2027/2809 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A coil component comprising:
a base body containing a plurality of metal magnetic particles and a binder, the binder being made of a resin, the base body having a plurality of surfaces including a first surface;
an external electrode provided on the first surface of the base body; and
a conductor electrically connected to the external electrode and wound around a coil axis in the base body, the conductor having a first end and a second end, the first end and the second end of the conductor being exposed from first surface of the base body,
wherein the external electrode includes a first electrode layer, a second electrode layer covering the first electrode layer, and a plating layer covering the second electrode layer, the first electrode layer being in direct contact with the first surface of the base body,
wherein each of the first electrode layer and the second electrode layer contains a plurality of fillers and a resin, and
wherein a proportion of a volume of the plurality of fillers in the second electrode layer is larger than a proportion of a volume of the plurality of fillers in the first electrode layer.