| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk whose copy is hard to be manufactured. <P>SOLUTION: The optical disk is a semitransparent one composed of a first substrate having an information recording area and a second substrate having a non-information recording area, both being stuck on each other. In the optical disk, an indication object is formed on at least one surface of the second substrate. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
