| 摘要 |
<p>A write once optical information recording medium such that the dependence of the recording laser beam on frequency is low, and the recording method is suitable for mark edge recording. The composition of a recording layer (2) of phase change type is limited in a region defined by the lines connecting four points A(0.475, 0.05, 0.475), B(0.665, 0.05, 0.285), C(0.60, 0.40, 0), and D(0.40, 0.60, 0) in the diagram of the Figure. Direct above or below the recording layer (2), a compound layer (3) is provided. The main component of the material of the compound layer (3) is at least one compound selected from the group consisting of PbSe, PbTe, SnSe, SnTe, Bi2Te3, and Sb2Te3. The heat conductivity of the material of a reflecting layer (4) is over 50W/m.K.</p> |
