| 摘要 |
PURPOSE:To improve the mass-productivity by using a double side adhering sheet adhesives for a transparent substrate of an optical disk so as to adhere a hub. CONSTITUTION:Two doughnut disk type transparent substrate 1 with a surface recording layer 2 formed thereto are adhered together while the layers 2 are opposed inward. A hub 4 is adhered to each of the substrate 1 with the double side adhering sheet adhesives 8. Thus, heating causing a bent to the substrate 1 is not applied and the optical disk is formed easily in a short time and the productivity of the information recording medium is improved. |
