Patent ID: 6696911
Filing Date: 2004-02-24
Classification: H01F

Abstract:
A multilayered common-mode choke coil comprising:a laminated body including a plurality of insulating layers and a plurality of coil conductors laminated together in a laminating direction; and at least two spiral coils which are defined by electrically connecting the coil conductors and which includes extended portions and coil portions; wherein the diameters of the coil portions of said at least two spiral coils are substantially the same, the axes of the coil portions are aligned collinearly, and said at least two spiral coils are aligned in the laminating direction; and the extended portions of the at least two spiral coils are extended on the insulating layers and junctions of the extended portions and the coil portions are located at substantially the center in a predetermined direction of the insulating layers so that the lengths of the coil portions of the spiral coils are substantially equal to each other.