| 摘要 |
PROBLEM TO BE SOLVED: To provide a recording medium provided with a DVD, a CD-R and a CD-RW in one disk without recording/reproducing errors. SOLUTION: In this optical recording medium for recording and reproducing information by light made incident from a substrate surface side, a plurality of substrates where an optical recording layer is formed are stuck together so as to have the substrate surface face to the same direction and arranged so as to bring the optical recording layer of the high recording density of recording information closer to a light incident surface. The optical recording layer of the lowest recording density is provided with performance of direct-read-after- write or rewrite. |
