Optical recording medium, and method of manufacturing same

摘要

A phase-change optical disc has a recording layer formed from a phase-change material switchable between a crystalline state and an amorphous state, and in which a light is focused onto the recording layer to change the phase thereof from crystalline to amorphous, thereby writing information signal onto the recording layer, wherein the phase-change material contains a GeSbTe alloy, and the recording layer is formed by sputtering in an Ar gas atmosphere containing at least either N2 or O2 gas. The optical recording medium is further improved in durability against repeated recording and adapted to always keep a stable and good write/read characteristic even after repetitions of signal recording.