Patent ID: 7535818

Claim:
An information recording carrier having minute pattern including plural grooves formed to be substantially in parallel and adjacent each other, comprising: a supporting body having the minute pattern; a recording layer formed on the minute pattern formed on the supporting body; and a light transmission layer formed on the recording layer, wherein the minute pattern is formed under a relation of P<λ/NA, where P represents a distance between centers of adjacent grooves, λ represents a wavelength of a laser beam, and NA represents a numerical aperture of an objective lens, wherein the plural grooves include at least a wobbling region, wherein said wobbling region records, as wobble, data modulated by phase shift modulation, wherein a minimum phase difference of phase portions composing the phase shift modulation is set within from π/8 to π, wherein the thickness of light transmission layer is from 0.02 to 0.12 mm, wherein the laser beam has a wavelength λ of from 350 nm to 450 nm and is projected onto said recording layer through said light transmission layer, wherein the objective lens has a numerical aperture NA of from 0.85 to 0.9, and wherein a single frequency is overlaid on the wobbling region.