| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent unauthorized use in case of theft or loss while avoiding malfunction by a simple structure. <P>SOLUTION: An antenna 112 for supplying a current to an IC chip 111 which information is written to and read from is provided with a disconnection part 115, and an area opposed to the disconnection part 115 is provided with a conductive pattern 131 for establishing conduction across the disconnection part 115 with a gap as thick as an intermediate layer 120a to the disconnection part 115. Areas opposed to short circuit generation parts 116a to 116h in the antenna 112 are provided with short circuit patterns 132a to 132d for electrically short-circuiting the short circuit generation parts 116a to 116h with a gap as thick as the intermediate layer 120a to the short circuit generation parts 116a to 116h. <P>COPYRIGHT: (C)2008,JPO&INPIT |
