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WIRELESS IC DEVICE

  • US 20110024510A1
  • Filed: 10/12/2010
  • Published: 02/03/2011
  • Est. Priority Date: 05/22/2008
  • Status: Active Grant
First Claim
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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;

    whereinthe 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.

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