| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk wherein crowd failures caused by the edge deformation of a pit are reduced, and a pit shape of good mold releasing is formed. <P>SOLUTION: By setting a shape dimension in which a curvature radius R<SB>2</SB>of a corner of a bottom side on the track section of a pit is larger than a curvature radius R<SB>1</SB>of the edge of an upper surface, the contact of a stamper 9 with a projection 8 during mold releasing is prevented, and thus an optical disk having a pit 11 of no edge deformation is provided. <P>COPYRIGHT: (C)2003,JPO |
