Patent ID: 8004411

Claim:
A wireless IC tag, comprising: an IC chip including a response circuit for receiving a signal sent from an interrogator and transmitting a response signal; a rectangular antenna connected to the response circuit; a first protective material having a hard to bend characteristic, for covering the IC chip; and a second protective material having an easier to bend characteristic than the first protective material, for covering at least a part of the antenna; wherein the antenna has a structure formed by superposing a pair of flat members including a first antenna member connected to the IC chip and a second antenna member, the second antenna member being arranged to be softer, tougher and more difficult to crease when bent than the first antenna member, wherein the second antenna member is longer than the first antenna member; wherein the first antenna member is provided with a slit serving as a matching circuit to match impedance between the antenna and the response circuit; and wherein the first antenna member is superposed on the second antenna member in such a manner that the slit of the first antenna member does not overlap the second antenna member.