| 摘要 |
In a rewritable compact disc having a wobble groove on a substrate and phase-change recording layer comprising one selected from the compositions represented by MzGey(SbxTel-x)l-y-z (where 0</=z</=0.1, 0<y</=0.1, 0.72</=x</=0.8, and M is at least one element selected from the group consisting of In, Ga, Si, Sn, Pb, Pd, Pt, Zn, Au, Ag, Zr, Hf, V, Nb, Ta, Cr, Co, Bi, O, N, S and rare earth metal elements) or by A<1>aA<2>bGec(SbdTel-d)l-a-b-c (where 0<a</=0.1, 0<b</=0.1, c<b<al, 0.02<c</=0.2, 0.72</=d</=0.8, and A<1> is at least one element selected from the group consisting of Zn, Pd, Pt, V, Nb, Ta, Cr, Co, Si, Sn, Pb, Bi, O, N, S and rare earth metal elements, and A<2> is at least one element selected from the group consisting of Ga and In). Recording at 8-times or higher velocities is realized by a divided pulse method without any risk of impairing the read-compatibility with the conventional CD-RW specifications at least at 4-times velocity. <IMAGE> |
