Patent ID: 7993818
Filing Date: 2011-08-09
Classification: B29D,G11B

Abstract:
1. A method for manufacturing an optical disk having a middle layer on a substrate, the method comprising: coating an ultraviolet curing resin over the substrate; irradiating infrared rays to the ultraviolet curing resin; irradiating ultraviolet rays to the ultraviolet curing resin and prepolymerizing the ultraviolet curing resin; and forming the middle layer by pressing a stamper against the prepolymerized ultraviolet curing resin, irradiating ultraviolet rays to the ultraviolet curing resin, thereby curing the ultraviolet curing resin, wherein the ultraviolet curing resin is prepolymerized by irradiating the ultraviolet rays to the ultraviolet curing resin at an intensity of irradiation ranging from 10% to 40% for completely curing the ultraviolet curing resin and ranging from 20 mW/cm wherein pressing the stamper is conducted inside a vacuum chamber where an inner circumferential side of the stamper is supported by an inner supporting mechanism and an outer circumferential side of the stamper is supported by an outer supporting mechanism, and in synchronization with an atmospheric pressure being applied to the stamper a holding state of the inner and outer supporting mechanisms is released which bends a middle circumference portion of the stamper downward to press against the ultraviolet curing resin.