Patent ID: 9691539
Date: 2017-06-27
CPC Classifications: H01F

Claim:
1. A coil component comprising: a component body having a rectangular parallelepiped shape having first and second main faces opposite each other, and first and second side faces opposite each other and first and second end faces opposite each other, each pair of which couples the first and second main faces, respectively, the side faces each having a rectangular shape having long sides and short sides, the component body having a multilayer structure in which a plurality of insulating layers are laminated in a direction orthogonal to the side faces; a coil conductor disposed inside the component body, the coil conductor including a plurality of circulating conductive layers each extending so as to form a part of an annular track along an interface between the insulating layers and a plurality of via hole conductors each penetrating the insulating layer in a thickness direction, the coil conductor extending helically by alternately connecting the circulating conductive layers and the via hole conductors; and first and second external terminal electrodes formed in an outer surface of the component body, the first and second external terminal electrodes being electrically connected to one and the other ends of the coil conductor, respectively, wherein the coil component is mounted such that the second main face faces a mounting surface of a circuit board, in such a posture that a central axis of the coil conductor extends in parallel with the mounting surface, the circulating conductive layer includes a long side portion extending in a direction of the long sides of the side faces and a short side portion extending in a direction of the short sides of the side faces, and a line width of the short side portion of the circulating conductive layer is wider than that of the long side portion of the circulating conductive layer.