METHOD FOR MANUFACTURING A MULTILAYER OPTICAL DISC, CAPABLE OF PREVENTING RECORDING OF A DISC AND A REPRODUCTION SIGNAL CHARACTERISTIC FROM DETERIORATION DUE TO COMA ABERRATION

摘要

PURPOSE: A method for manufacturing a multilayer optical disc is provided to from a middle layer having the same thickness and precisely duplicating a new information recoding layer pattern on a middle layer.;CONSTITUTION: An optical hardener is spread on a disc substrate after loading up and vacuum-absorbing a disc substrate which information recording layer is formed on a fixed lower plate. By accessing and rotating an upper plate which stamper substrate is absorbed to a lower plate, optical hardener is spread from an internal side to an external side. If a flow boundary face of optical hardener is a stable shear flow state in an internal side and an external side of the disc, optical hardener is filled as a pattern of stamper by adding an air pressure on a stamper substrate and divides a stamper substrate absorbed on an upper plate at the same time. By examining ultraviolet ray and hardening an optical hardener, a middle layer is completed. The upper plate and a disc substrate are divided.;COPYRIGHT KIPO 2011