Patent ID: 8526291
Filing Date: 2013-09-03
Classification: B82Y,G11B

Abstract:
1. An optical information recording medium comprising: a plurality of recording layers, each of which undergoes a change in a refractive index by irradiation with a recording beam; and at least one intermediate layer provided between the recording layers, wherein each of the recording layers contains a polymer binder and dye dispersed in the polymer binder, wherein at least in proximity to an interface between the intermediate layer and a recording layer disposed adjacent to an incident side of the intermediate layer from which the recording beam enters the intermediate layer, the intermediate layer has a refractive index different from that of the recording layer, wherein a glass transition temperature of the polymer binder is lower than a melting point and a decomposition point of the dye, and wherein a refractive index of the polymer binder changes by receiving heat generated when the dye absorbs the recording beam, whereby information is recordable in the recording layer.