Optical information recording medium, method for manufacturing the same and recording/reproduction method

摘要

A phase-change optical information recording medium includes, on a transparent substrate, a recording layer in which an optically detectable reversible change between an amorphous phase and a crystalline phase can be caused by irradiation with an energy beam, a reflective layer, and a dielectric layer arranged between the recording layer and the dielectric layer. A main component of the reflective layer is Ag. A main component of the dielectric layer is at least one selected from the group consisting of an oxide of Ta, nitride of Ta and a nitrooxide of Ta. An interface layer may be provided between the recording layer and the dielectric layer. Thus, an optical information recording medium with superior corrosion resistance, improved signal amplitude and high reliability can be provided, as well as a method for manufacturing the same and a method for recording/reproducing the same.