| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a recording and playback method of information suitable for continuous recording or continuous playback in a multilayer optical recording medium wherein a film structure is changed for price reduction. <P>SOLUTION: The multilayer optical recording medium is used, wherein at least a region where recording or playback of information is performed is a mirror surface where a high reflectance metal layer 2 is formed and spiral directions of grooves of an L0 recording layer 4 and an L1 recording layer 6 are different from each other, and a beam is alternately transferred between two recording layers when recording or playback is continuously performed between the two recording layers. Thereby, continuous recording or continuous playback is made possible. <P>COPYRIGHT: (C)2009,JPO&INPIT |
