US 12,347,600 B2
Inductor component and method of manufacturing inductor component
Shinji Yasuda, Nagaokakyo (JP); Yoshinori Taguchi, Nagaokakyo (JP); Yoshimasa Yoshioka, Nagaokakyo (JP); and Akinori Hamada, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Aug. 19, 2019, as Appl. No. 16/544,304.
Claims priority of application No. 2018-184099 (JP), filed on Sep. 28, 2018.
Prior Publication US 2020/0105457 A1, Apr. 2, 2020
Int. Cl. H01F 27/28 (2006.01); H01F 27/29 (2006.01); H01F 27/34 (2006.01); H01F 41/04 (2006.01)
CPC H01F 27/2804 (2013.01) [H01F 27/29 (2013.01); H01F 27/34 (2013.01); H01F 41/041 (2013.01); H01F 2027/2809 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An inductor component comprising:
an element body including a first magnetic layer and a second magnetic layer that contain a metal magnetic powder and that are laminated along a first direction;
a spiral wiring disposed between the first magnetic layer and the second magnetic layer;
a vertical wiring connected to the spiral wiring and extending in the first direction to penetrate the element body; and
an external terminal connected to the vertical wiring, the external terminal including an exposed surface that is exposed on a first principal surface of the element body orthogonal to the first direction, wherein
the spiral wiring is disposed on a first plane orthogonal to the first direction and includes a pad part to which the vertical wiring is connected, a spiral part extending from the pad part on the first plane, and a lead-out part that extends on the first plane and is exposed from a side surface of the element body parallel to the first direction,
the pad part and the lead-out part are disposed on opposite ends of the spiral wiring,
the pad part is disposed at an innermost end of the spiral part,
when viewed in plan view, the vertical wiring is entirely surrounded by a periphery of the pad part,
the vertical wiring extends, in the first direction, from the spiral wiring to the external terminal,
on the first principal surface of the element body, the external terminal is embedded in, and entirely surrounded by, an insulating coating film,
the exposed surface of the external terminal is aligned in a plane with an exposed surface of the insulating coating film,
the exposed surface of the external terminal is separated from all side surfaces of the element body parallel to the first direction by the insulating coating film, and
the vertical wiring and the pad part have an elliptical shape when viewed in plan view, the elliptical shape having a minor axis in the first direction and a major axis in a second direction orthogonal to the first direction, the major axis and minor axis being different lengths.