Patent ID: 7167070

Claim:
A laminated coil comprising: a laminated body; via holes formed in a lamination direction of said laminated body; conductors disposed on laminating surfaces of the laminated body and fixed end portions of which are connected thereto by the via holes; and a coil wound in a direction that is substantially perpendicular to the lamination direction; wherein the via holes are disposed in each ceramic layer constituting the laminated body and define through-holes, each being filled with a conductor material and arranged along a row in the lamination direction; and in each of the through-holes, a difference between a diameter in an axial direction of the coil on an opening surface of one opening of the ceramic layer and a diameter in the axial direction of the coil on an opening surface of another opening is smaller than a difference between a diameter in a direction that is substantially perpendicular to the axial direction of the coil on the opening surface of said one opening of the ceramic layer and a diameter in a direction that is substantially perpendicular to the axial direction of the coil on the opening surface of said another opening.