| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk-like information recording medium capable of ensuring the quality of the disk-like information recording medium even when used in a piled state.SOLUTION: The disk-like information recording medium has a constitution that a base plate 101 and a base plate 102 each having a predetermined thickness, which are bonded to each other. On one face includes: a deposition area 107 including a recording region, a clamp area 105 and a rib 103; and the other face, a deposition area 108 including a recording region, a clamp area 106 and a rib 104. Both faces are formed with, from the inner side to the periphery side, the rib, the clamp area, and the deposition area in this order. |
