| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a contactless information medium capable of preventing corrosion of an antenna by suppressing transmission of various kinds of ions, and to provide an IC booklet, an IC card, and an IC tag using the same. <P>SOLUTION: A contactless information medium includes a contactless IC inlet having an antenna base material, a coil antenna provided on one surface of the antenna base material, and an IC chip mounted on the one surface of the antenna base material and to which the coil antenna is connected, and a pair of exterior base materials laminated on and bonded to the one surface of the antenna base material, which is exposed on a surface of the coil antenna and the outside of the coil antenna, and a surface of the antenna base material opposite to the one surface, respectively, via adhesive layers. A thickness t<SB POS="POST">an</SB>of the coil antenna and a coating thickness t<SB POS="POST">ad</SB>of the adhesive layers satisfy (t<SB POS="POST">ad</SB>-10)≤t<SB POS="POST">an</SB>/2≤(t<SB POS="POST">ad</SB>-5). <P>COPYRIGHT: (C)2012,JPO&INPIT |
