| 摘要 |
<p>An optical recording medium of the type on which information can be written, and read by irradiating light to a recording layer formed on a substrate and in which writing and erasing of the information are effected by phase transition between an amorphous phase and a crystalline phase, includes at least a substrate (1), a recording layer (3) one or two protective layers (2,4). The composition of the recording layer comprises at least one kind of metal selected from palladium (Pd), nickel (Ni), silver (Ag), and gold (Au); antimony (Sb); germanium (Ge); and tellurium (Te), and is expressed by the formula given below. (MxSbyTe1-x-y)1-z(Te0.5Ge0.5)z 0.01 </= x </= 0.1 0.35 </= y </= 0.65 0.1 </= z </= 0.2 where each of x, y, z and 0.5 represents the atomic fraction of each element and M represents at least one kind of metal selected from Pd, Ni, Ag and Au.</p> |
