HERSTELLUNGSVERFAHREN FÜR EIN MEHRSCHICHTIGES OPTISCHES INFORMATIONSAUFZEICHNUNGSMEDIUM

摘要

When a separation layer is formed using a stamper between a substrate and the stamper on a thick substrate, on the surface of which a rewritable recording multilayer film provided with signal guide grooves or pits and the signal guide grooves or pits are transferred from the stamper to the surface, variations in the thickness of the separation layer are produced due to unevenness of the distance between the stamper and the substrate. The surface of the kth signal recording layer 100 of the kth signal substrate 103 is shaped parallel to the surface with the guide grooves and pits 105 of the (k-1)th signal recording layer on the (k-1)th stamper 106, a (k-1)th separation layer 107 is formed between the two and then the (k-1)th stamper 106 is peeled off. The distance between the surface with the guide grooves and pits 105 of the (k-1)th signal recording layer and the kth signal recording layer 100 becomes uniform, and therefore the thickness of the (k-1)th separation layer 107 can be kept uniform.