Patent ID: 9147518
Filing Date: 2015-09-29
Classification: H01F

Abstract:
1. An inductor comprising: a stacked structure including a substrate, a first structural body stacked on a lower surface of the substrate, and a plurality of second structural bodies sequentially stacked on an upper surface of the substrate; a through hole extending through the stacked structure in a thickness direction; and an insulation film covering the stacked structure, wherein: the first structural body includes a first insulating layer, which is stacked on the lower surface of the substrate, and a first wiring, which is stacked on a lower surface of the first insulating layer; the first wiring is positioned at a lowermost layer of the stacked structure; the plurality of second structural bodies include a plurality of second insulating layers and a plurality of second wirings, respectively; one of the second insulating layers is positioned at an uppermost layer of the stacked structure; each of the second insulating layers is stacked on an upper surface of a corresponding one of the second wirings; an inner surface of the substrate, an inner surface of the first structural body, and inner surfaces of the second structural bodies define an inner wall surface of the through hole; the first wiring includes a first connection portion; the second wiring of the uppermost one of the second structural bodies includes a second connection portion; the insulation film covers the stacked structure except for a surface of the stacked structure on which the first connection portion and the second connection portion are exposed; the first wiring and the second wirings are connected in series to one another to form a helical coil; and the substrate has a thickness greater than that of the first insulating layer and greater than that of each of the second insulating layers.