| 摘要 |
PROBLEM TO BE SOLVED: To provide an IC label which can suppress decrease in communicable distance when compared with that in a single body even if it is stuck onto a commodity, etc. SOLUTION: This IC label has an IC module 31, an adhesive layer 7 laminated on the IC module 31, a skin layer 4 laminated on the adhesive layer 7, a tacky layer 5 laminated on the reverse side of a circuit board 1, and a peeling layer 6 laminated on the reverse surface of the tacky layer 5. The IC module has a circuit base material 1, an IC chip 3 which is arranged on the circuit base material 1 and has a capacitor inside, and an antenna coil 2 which is electrically to the IC chip 3 on the circuit base material 1. The resonance frequency f0 of the LC resonance circuit composed of the capacitor and antenna coil 2 to a free space is set shifting to the frequency side higher than the oscillation frequency fosc of an external information recording and reproducing device. The decrease in resonance frequency fop when the IC label is stuck, is canceled by making the resonance frequency f0 higher than the oscillation frequency fosc. |
