| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent warpage and distortion of a light transmissible resin sheet (a second substrate) by forming a rugged-shaped pit or groove pattern on both surfaces of the light transmissible resin sheet (the second substrate). <P>SOLUTION: There is provided an optical disk 10A including: a first substrate 16; and the second substrate which is stuck to the first substrate 16, and has a dummy pattern surface having a rugged shaped dummy pattern 11a on one surface thereof and a signal surface having a rugged shaped signal pattern 11b based on a prescribed optical disk specification on the other surface thereof opposite to the one surface. <P>COPYRIGHT: (C)2010,JPO&INPIT |
