| 摘要 |
<p>A phase change type optical recording medium has at least a first dielectric layer, a first boundary layer, a recording layer, a second boundary layer, an absorption correction layer and a reflection layer in this order on a substrate. The recording layer has a specific composition of the formula <DF>Ä(äGe1-kSnk)0.5Te0.5üx(Sb0.4Te0.6)1-xÜ1-ySbyAz </DF> where A is an element of any of the groups 3-14 of the 3rd-6th period of the periodic table, excluding Ga, Sb and Te; and x, y,z and k are in ranges respectively represented by formulae (1) or (2): <DF NUM="(1)">0.5≤x≤0.95; 0≤y≤0.08; 0≤z≤0.2; k = 0 </DF> <DF NUM="(2)">0.5≤x≤0.95 0.01≤y≤0.08; z = 0; 0≤k≤0.5 </DF> The first and second boundary layers are respectively mainly composed of at least one of carbon, carbides, oxides and nitrides, and the absorption correction layer has a refractive index of 1.0 to 4.0 and an attenuation coefficient of 0.5 to 3.0.</p> |
