Patent ID: 8596545

Claim:
A component of a wireless IC device, comprising: a wireless IC chip; and a feeding circuit substrate including at least one of a resonance circuit or a matching circuit including an inductance element coupled to the wireless IC chip; wherein the feeding circuit substrate is a multilayered substrate including a plurality of resin layers; the inductance element is defined by a plurality of electrodes; both of the wireless IC chip and the plurality of electrodes defining the inductance element are provided within the multilayered substrate; connection portions between the wireless IC chip and the plurality of electrodes defining the inductance element are provided within the multilayered substrate; the plurality of electrodes defining the inductance element include at least one annular electrode having an annular shape and including via hole conductors provided in the feeding circuit substrate; a winding axis of the at least one annular electrode is perpendicular or substantially perpendicular to a lamination direction of the plurality of resin layers; each of the via hole conductors is defined by a conductive material that is filled and cured in a hole in the plurality of resin layers; and the wireless IC chip is disposed within an area of the feeding circuit substrate that is surrounded on at least two sides by a plurality of the via hole conductors.