Patent ID: 7682678

Claim:
An optical information recording medium storing on a substrate information which can be reproduced by irradiation of a light beam, comprising: a temperature responsive layer whose reflectance and/or transmittance changes with a change in temperature caused by the irradiation of a light beam; a light absorption layer which raises a temperature of the temperature responsive layer by absorbing the light beam to exchange the light beam into heat; and a heat insulating layer which enables an efficient rise in temperature of the temperature responsive layer, wherein the temperature responsive layer is a film formed from one of ZnO, ZnS, SnO 2 , CeO 2 , NiO 2 , In 2 O 3 , TiO 2 , Ta 2 O5, VO 2 , and SrTiO 3 , the light absorption layer is a film formed from one of Si, Ge, AgInSbTe, GeSbTe, TbFeCo, DyFeCo, and GdFeCo, and the heat insulating layer is a film formed from one of SiN and AIN, and the temperature responsive layer, the light absorption layer, the heat insulating layer, and the substrate being provided in this order from a side from which the light beam enters.