| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a freely designed disk having a shape which is not a circular shape and to differentiate the disk from other single compact disks by placing a plate to be worked on a single compact disk and working the plate. SOLUTION: A plate 2 to be worked is placed on an upper part of a circular single compact disk 1 for obtaining a free shape and the plate 2 is free-shapedly worked to realize this compact disk. Or a freely designed single compact disk having a shape which is not a circular shape can be manufactured by manufacturing a single compact disk having a pre-designed shape. Therefore, contents written in the single compact disk 1 can be expressed by the free design and this compact disk can be differentiated from the other single compact disks and also has effectiveness as a sales promoting medium. |
