Patent ID: 8435620

Claim:
An optical recording medium, comprising: a substrate; a first passivation layer disposed on the substrate; a second passivation layer disposed over the first passivation layer; a dielectric layer disposed between the first and the second passivation layers, and having a refractive index of about 2.0 to about 2.5; and a recording layer in contact with the dielectric layer, and having a refractive index of about 2.5 to about 3.0, wherein the recording layer comprises a material represented by a composition formula of Bi x Ge y O (1-x-y) , wherein x and y respectively represent atomic ratios of bismuth and germanium, and satisfy the requirements of the following formulae: 2.8≦(x/y)≦25 and 0.55≦(1−x−y)<0.62.