Optical recording medium and optical recording method using the same

摘要: An optical recording medium having a layer of material provided on substrate, the an property which is changed reversibly by means light or heat, so that writing/reproducing writing/reproducing/erasing information performed using reversible change layer. The composed plurality elements and capable taking, as melt state thereof, selected one single phase two-phase coexistent state. method for performing uses irradiating with high-power beam to it into then cooling form phase-changed portion corresponding erasing irradiated low-power be melted coexistence cooled