| 摘要 |
<p>PURPOSE:To prevent a false manufacture due to rewriting of information by providing an infrared ray reflecting layer and an infrared ray absorption bar code, a concealing layer and a thermal coloring layer on one side face of a base, and providing a magnetic recording layer on the other side face. CONSTITUTION:An infrared ray reflecting layer 11, an infrared ray absorption bar code 12, a concealing layer 133, and a thermal coloring layer 14 are provided on one side face of a base 10, and a magnetic recording layer 16 is provided on the other side face. Information is recorded on the magnetic recording layer 16, and the information is related to the infrared ray absorption bar code 12 or patterned infrared ray reflecting layer 11. Accordingly, the information recorded on the magnetic recording layer 16 is collated with the waveform of the infrared ray absorption bar code 12 or the patterned infrared ray reflecting layer 11 related to the information to be sensed by an infrared sensor to be identified. Further, since the infrared ray reflecting layer 11 and the infrared ray absorption bar code 12 are invisible by the concealing layer 13, it is further difficult to know the existence. Thus, false manufacture of information recording medium can be prevented.</p> |
