| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-quality optical card with IC having the good flatness from a central hole to a clamping area and having good disk unbalance characteristics. SOLUTION: The optical card with the IC is formed by previously creating recesses which permits the embedment of an IC module and antenna within the retainer area of an optical disk by utilizing the projection of a retainer for fixing a stamper in molding the optical disk substrate. |
