| 摘要 |
PURPOSE:To supply a thin optical recording disk with high reliability, reduced in variations of the double refraction and mechanical characteristics, and securing the adhesive strength between the optical disk and a hub. CONSTITUTION:In the optical disk adhering the hub 8 in the vicinity of the center, the adhering surface 9 of the hub 8 with the optical disk is made metallic and as an adhesive used for this adhesion, one incorporating a multifunctional acrylate incorporating urethane groups, an optical polymerization initiator and a coupling agent, is used. |
