| 摘要 |
Laser light used to make crystal space portions on a recording layer is divided into, and irradiated in, at least two kinds of steps. Thus, the recording layer can be maintained in a temperature zone increasing the crystal nuclei generating frequency and in a temperature zone increasing the crystal growth rate with a good balance between these temperature zones. Therefore, it is possible to remove "fail-to-erase" portions upon making crystal space portions by promotion of crystallization and to improve the overwrite erasability. It is especially effective in a mode for recording on a recording medium in a non-initialized status, i.e., in a mode for recording crystal spaces on an as-depo amorphous-state medium.
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