| 摘要 |
<p>A record medium comprises a substrate (202), information layers (203) formed on the substrate to record information signals as the length of a mark formed by irradiation with light from the side of the substrate and as the length of a space between two marks, and a protection board (205) formed on the information layers. The information layers each comprises a management region (206) which carries information on start end record conditions for varying a record start position which forms the start end part of the mark with information layers to be recorded and information on rear end record conditions for varying a record end position which forms the rear end part of the mark with information layers to be recorded.</p> |
