Patent ID: 7505393

Claim:
An information recording carrier having minute pattern including plural grooves or lands formed to be substantially in parallel and adjacent each other, wherein when a pitch of each groove or land is P, a wavelength of a laser beam is λ and a numerical aperture of an objective lens is NA, the minute pattern is formed under a relation of P<λ/NA; wherein the plural grooves or lands include at least a wobbling region and data is recorded wobblingly in the wobbling region by frequency shift modulation; wherein digital recording using the frequency shift modulation is carried out by frequency shift modulation in which with a predetermined frequency having either of 1-100 waves as a channel bit, the frequency is changed over for each channel bit; and wherein a phase relation between a high frequency portion and a low frequency portion composing the frequency shift modulation is ±(π/20.5) to ±(π/0.75).