METHOD FOR MANUFACTURING MULTILAYER OPTICAL RECORDING MEDIUM

摘要

Provided is a method for manufacturing a multilayer optical recording medium. The optical recording medium is provided with a plurality of signal recording layers on a signal recording/reproducing side; an intermediate layer composed of a resin layer between the signal recording layers; and a transparent protection layer, i.e., an outermost layer, having a thickness of 10-150µm. An area inside the inner diameter of the signal recording area having a diameter of 23mm or more is used as a clamp area. The method includes a step of preparing a substrate wherein the signal recording layer is provided on the main side of the signal recording/reproducing side, a protruding section is arranged inside of an area having a diameter of 22mm, and a step between an area with a diameter of 23mm and that with a diameter of 21mm is 20µm or less; a step of preparing a stamper; a step of applying a radiation curing resin for the intermediate layer, from an area corresponding to the clamp area of the substrate or the stamper, in a radius direction from inside; a step of placing the substrate and the stamper one over another with the radiation curing resin in between; a step of curing the radiation curing resin; and a step of removing the stamper from the substrate and obtaining a cured layer of the radiation curing resin on the substrate as the intermediate layer.