| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk substrate whose stuck rib does not damage a screen or a sequeegee in screen printing. <P>SOLUTION: In this optical disk substrate 12 having a signal area where a stamper transfers a signal to one surface and the stuck rib 13 formed between an outer circumferential edge and an opening part, the angle of inclination from a top part to a rising part on an outer circumferential side of the disk substrate 12 is smaller than the angle of inclination from a rising part on a central opening part side of the disk substrate 12 with respect to the stuck rib 13 to the top part. <P>COPYRIGHT: (C)2003,JPO |
