| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily discriminate various kinds of manufacturing information for an optical disk. <P>SOLUTION: The optical disk 10 has visible information on the outer peripheral end surface thereof and the visible information includes at least any one of a manufacturer name, a name of place of production, a production line, day and time of production, a production lot number, a production serial number, a disk brand and a stamper number. <P>COPYRIGHT: (C)2007,JPO&INPIT |
