Optical recording medium, optical recording method, optical reproducing method, optical recording device, optical reproducing device, and optical recording/reproducing device

摘要

An optical recording medium having an information layer with a reflective film on which an information recording portion is formed by physical change of shape at least in one direction of thickness and track width, the reflective film having such a structure that additional recording can be performed by thermal recording, and that the reflectance of the reflective film changes in the range of 0.5%<(|R0-R1|/R0)x100%<17%, WHERE R0 is reflectance of non-recording state and R1 is reflectance of recording state for reproducing beam. Such optical recording medium can be manufactured at low cost with additional recording.