| 摘要 |
<p>An optical information recording medium comprising a substrate and a phase-change recording layer including a crystal portion, which is brought into an unrecorded/erased state, and an amorphous portion, which is brought into a recorded state, for recording information by using recording marks whose shortest mark length is 0.5 νm or less, is characterized in that erasure is effected by recrystalization substantially progressed by the growth of crystals from the boundary between the amorphous portion or a fusible portion and the peripheral crystal portion. The medium has a feature that high-speed overwrite is possible, the jitters at the mark edges are small, high-density variable mark-length recording is possible, and the stability of the marks with time is very good. An optical recording method suitable for such a medium is also disclosed.</p> |
