Patent ID: 8215562

Claim:
A wireless tag configured to be attached onto a disc-shaped recording medium including a first region and a second region, the first region made of a nonconductive member, the first region disposed on an inner radial part of the recording medium, the second region including a conductive member, the second region disposed on an outer radial part of the recording medium, comprising: a feed section configured to be connected to a wireless IC chip; and a slot antenna configured to receive power from the feed section, the slot antenna including a conductive plate having a slot, wherein the conductive plate is formed for at least partially overlapping the second region of the recording medium when the wireless tag is attached onto the inner radial part of the recording medium, the slot has a length set for obtaining an inductance enough to cause resonance between the slot antenna and the wireless IC chip at a predetermined wireless frequency, and the slot extends from opposing sides of the feed section to respective ends of the slot.