Patent ID: 7967216
Filing Date: 2011-06-28
Classification: G06K,H01Q,H04B,Y10T

Abstract:
1. A wireless IC device comprising: a laminate including a plurality of insulator layers stacked on top of one another; an antenna coil having a helical shape and including a plurality of conductor layers and a plurality of via hole conductors being connected to one another, a first end portion arranged in a lowermost conductor layer of the plurality of conductor layers in a direction in which the layers are stacked, and a second end portion arranged in an uppermost conductor layer of the plurality of conductor layers in the direction in which the layers are stacked; a wireless IC electrically connected to the first end portion and the second end portion; and a penetrating via hole conductor arranged between the first end portion and the wireless IC and penetrating through the plurality of insulator layers; wherein the plurality of via hole conductors includes a first via hole conductor arranged such that a length of a current path thereto from the second end portion is the shortest among the plurality of via hole conductors in the antenna coil and a second via hole conductor; and a distance between the penetrating via hole conductor and the first via hole conductor is greater than a distance between the penetrating via hole conductor and the second via hole conductor when viewed in plan from the direction in which the layers are stacked.