Patent ID: 7020065

Claim:
An optical information recording medium comprising a disk-shaped transparent substrate and n recording layers (where n is an integer of at least 2) for recording reproducing or erasing information by irradiation of laser light, the recording layers being formed over the substrate, wherein the recording layers comprise information tracks, the information tracks comprise information recording regions and address regions interposed between the information recording regions, the information recording regions and the address regions being arranged along a tracking direction of the laser light, prepit addresses for providing information on a position on the recording medium are formed on the address regions, and in at least the first recording layer to the (n-1)th recording layer from the transparent substrate side, no pair of adjacent leading edges of address regions, in the radial direction of the disk in each of the first recording layer to the (n-1)th recording layer, are arranged so as to be aligned on a straight line passing through a center of the disk.