US 11,923,118 B2
Coil component and method of manufacturing coil component
Shuhei Sato, Nagaokakyo (JP); Yuki Kanbe, Nagaokakyo (JP); Hiroyuki Maso, Nagaokakyo (JP); and Masaaki Fukuda, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Oct. 6, 2020, as Appl. No. 17/064,369.
Claims priority of provisional application 62/912,302, filed on Oct. 8, 2019.
Prior Publication US 2021/0104346 A1, Apr. 8, 2021
Int. Cl. H01F 17/04 (2006.01); H01F 27/28 (2006.01); H01F 27/29 (2006.01)
CPC H01F 17/045 (2013.01) [H01F 27/2823 (2013.01); H01F 27/292 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A coil component comprising:
a drum core including a winding core portion extending in a first direction and a pair of flange portions provided at both ends of the winding core portion, at least one flange of the pair of flange portions having a step, an inner curved surface portion adjacent to the step and an outer curved surface portion adjacent to the step such that the inner curved surface portion and the outer curved surface portion are provided, respectively, at a beginning and an end of the step;
a terminal electrode provided on the step; and
a wire wound around the winding core portion with an end bonded to the terminal electrode, wherein
the terminal electrode includes plural metal layers, an outermost layer of which is an Sn film having a flattened mounting surface, and
the flattened mounting surface overlaps the step when seen in a second direction perpendicular to the first direction.