Patent ID: 7096479

Claim:
An optical information recording medium for recording information comprising: a substrate; and a phase-change type optical recording layer provided as one of a plurality of layers formed on the substrate, the phase-change type optical recording layer further containing at least Ti, In, Ge, Sb and Te, when defining each content amount of the Ti, In, Ge, Sb and Te as v, w, x, y and z in atomic percent respectively, each content amount of v, w, x, y and z in atomic percent satisfying following relations: 0.3≦v≦4, 0.3≦w≦3, 3.4≦x≦14.5, 2.1 ≦y/z≦ 4 and 98.8≦ v+w+x+y+z≦ 100.