Patent ID: 6630219
Filing Date: 2003-10-07
Classification: G11B,Y10T

Abstract:
An optical disk utilizing both a groove and a land as a recording track, comprising:a first pit string of pits lined along a length of a track, provided in a first recording track which is either a groove or a land; and a second pit string of pits lined along a length of a track, provided in a first recording track which is adjacent, in a radial direction of the disk, to the first recording track in which the first pit string is provided, wherein: the second pit string is displaced off the first pit string along a length of a track so as not to overlap the first pit string in a radial direction of the disk; and an interval between two pits which are adjacent along a length of a track in the first and second pit strings is specified to be equal to, or less than, half a width of the two pits measured in a radial direction of the disk.