| 摘要 |
PURPOSE: A high density optical disk and a method for manufacturing the same are provided to improve injection property and vibration property at the same time by injecting two different types of resins in order. CONSTITUTION: In a high density optical disk having an inversion structure that a substrate, an optical reflecting layer(30), an information recording layer(40), and a protective layer(50) are accumulated in order, the substrate includes a surface layer(20) formed by injection-molding a high fluidity resin having uneven information signals of the information recording layer at one side, and a core layer(10) accumulated on the surface layer and formed of an engineering plastic having larger stiffness than the resin formed at the surface layer. |
