| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a metal rivet which can read surely information in exterior in the state of noncontact by holding uniformly the output of an electromagnetic wave discharged outside without reducing the output of the electromagnetic wave generated from the metal rivet in which an information storage element is embedded. <P>SOLUTION: The information storage element is provided with: an information storage circuit which memorizes the information in the upper part of this reflector by mounting a thin plate-like electromagnetic wave reflector including an amorphous at a recess part provided in this metal body surface exposed to the surface of the earth or the bottom of a through hole provided in this body; and an antenna which originates information memorized by a memory unit in response to an electromagnetic wave from the outside. While the recess or the through hole provided in this metal body surface is blocked, it is a sealing body having magnetic permeability in which the top surface is arranged on almost the same whole surface with this metal body surface. <P>COPYRIGHT: (C)2007,JPO&INPIT |
