Patent ID: 6607869
Filing Date: 2003-08-19
Classification: C23C,G11B,Y10S

Abstract:
An optical information recording medium comprising, in order:a substrate; a first light interference layer; a recording layer; a second light interference layer; a reflective layer; and a protective layer: wherein: said recording layer comprises Te, Ge, Sb, and N; said recording layer is a composition of the formula {(GeTe)x(Sb2Te3)1Sby}100âˆ’zNz, where 1.6&lE;x&lE;2.2; 0&lE;y&lE;0.8; and 2&lE;z&lE;3.1; and said recording layer is capable of undergoing a reversible phase change on irradiation with an energy beam disposed above said substrate; wherein said recording layer has a portion changing said concentration of said N in a thickness direction of said recording layer.