Patent ID: 7643402

Claim:
An information recording carrier having minute pattern including plural grooves or lands formed to be substantially in parallel and adjacent each other, comprising: a supporting body having the minute pattern thereon; a recording layer formed on the minute pattern; and a light transmission layer formed on the recording layer, 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 have at least a wobbling region and data is recorded wobblingly in the wobbling region by frequency shift modulation; wherein the wobbling region includes a single modulation region in which data is recorded as a wave having a single frequency; and wherein the single frequency is equal to one of frequencies of a high frequency portion and a low frequency portion composing the frequency shift modulation.