Patent ID: 8139468

Claim:
An optical recording medium comprising: a stacked structure which comprises a first deformable material layer comprising a phase-change material and a second deformable material layer comprising a material which contains a silicon oxide (SiOx; 0<x≦2), wherein after information is recorded, the thickness of the first deformable material layer is changed according to the recorded information making the center of the recorded marks thicker than the ends, and the second deformable material layer is deformed and altered corresponding to the concave-convex-pattern formed on the first deformable material layer based on the recorded information, wherein the second deformable material layer comprises at least a zinc chemical compound and SiOx where x is 2 or less and the composition ratio of the zinc chemical compound to SiOx (zinc chemical compound/SiOx) is 1.5 to 9, and wherein the second deformable material layer has a hardness of at least 8 GPa.