| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable suppressing secular change without raising a manufacturing cost in an optical disk of a sticking type. <P>SOLUTION: In a manufacturing method for an optical disk in which a first substrate 1 and a second substrate 11 are injection-molded, an information signal part is formed on one main surface of at least either of the first substrate 1 and the second substrate 11, one main surface of the first substrate 1 and one main surface of the second substrate 11 are stuck so as to be opposite, shrinkage factors of the first substrate 1 and the second substrate 11 are controlled by conditions when the first substrate 1 and the second substrate 11 are injection-molded, and secular change of warp of an optical disk is suppressed. <P>COPYRIGHT: (C)2004,JPO |
