Patent ID: 9666356
Date: 2017-05-30
CPC Classifications: H01F,H02H,H03H

Claim:
1. A laminated common-mode choke coil comprising: a lamination element including a plurality of base layers laminated on each other in a lamination direction; and a primary coil and a secondary coil that are provided in the lamination element and coupled to each other; wherein the primary coil includes: the secondary coil includes: a number of turns of the first annular conductors is greater than one and a number of turns of the second annular conductors is greater than one; the primary coil includes a first gap between linear portions of the first annular conductors that are adjacent to each other; the secondary coil includes a second gap between linear portions of the second annular conductors that are adjacent to each other; portions of the second annular conductors and the second gap are located inside the first gap so as to extend along the first gap in a planar view in the lamination direction; and a total length of portions of the first and second annular conductors where the first annular conductors overlap the second annular conductors in the planar view in the lamination direction is less than or equal to a half-length of the first annular conductors or the second annular conductors.