Patent ID: 7563402
Filing Date: 2009-07-21
Classification: B29C,B29D,Y10S

Abstract:
1. An apparatus for manufacturing an optical disc by which a disc-shaped stamper stuck on the upper surface of a disc-shaped substrate with a resin layer interposed therebetween so as to be concentric with said disc-shaped substrate and having an outer diameter larger than the outer diameter of said disc-shaped substrate is stripped-off from said disc-shaped substrate, comprising: a table contacting with the underside of said disc-shaped substrate to thereby attract and hold said substrate and having as the upper surface thereof a circular surface having an outer diameter equal to or small than that of said disc-shaped substrate; rollers disposed at locations equidistant from the center of said circular surface of said table and at regular intervals around said table, contacting with an area which is the surface of said stamper opposed to said disc-shaped substrate and which protrudes from the area stuck on said disc-shaped substrate, and capable of rolling relative to the contacting surface of said stamper by having a rolling axis extending in parallel with the surface of said stamper; a first driving device for rotating said table relative to said rollers with the center of said circular surface of said table as a rotation center; and a second drive device for elevating said rollers relative to said circular surface of said table in a direction perpendicular to said circular surface, wherein each of said rollers relatively moves along a periphery of said stamper while contacting with the contacting surface of said stamper by relative rotational movement of said table and said rollers.