Stamper protecting layer for optical disk molding apparatus, optical disk molding apparatus and optical disk molding method using the stamper protecting layer

摘要

A stamper protecting layer is interposed between a mold and a stamper of an optical disk molding apparatus, so that forces generated by extension and shrinkage of the stamper relative in a diametrical direction of the stamper to the mold when an optical disk is molded are absorbed by the stamper protecting layer, with this arrangement, the stamper is prevented from being deformed. Accordingly quality and production of the optical disks are improved.