| 摘要 |
<p>PURPOSE:To make alteration impossible by mounting the first recording member generating magnetic transformation from a ferromagnetic state to a non- magnetic state by the heating of a heat supply means and the second recording member generating magnetic transformation from a non-magnetic state to a ferromagnetic state by mechanical deformation. CONSTITUTION:By applying mechanical deformation to a data recording part 4 by rolling, embossing, punching or stamping due to a wire dot, the mechanical deformation applied part of the upper surface of the recording part 4 is changed to a ferromagnetic state 6 and this magnetic transformation can be magnetically read by a magnetic sensor such as a magnetic head or a reluctance element. Further, by controlling the radiation intensity of laser beam to a data recording part 2, three-value recording of a ferromagnetic part '2' not irradiated at all and generating no magnetic change, a part '1' transformed halfway and a part '0' perfectly transformed by strong energy can be performed. Timing data becoming necessary when the reading/writing of the data recording part 2 by laser beam separate from the laser beam used in the recording of the data recording part 2 is recorded on a data recording part 3 when a recording medium is published.</p> |
