Patent ID: 7420911

Claim:
An information recording carrier having minute pattern including plural grooves formed to be substantially in parallel and adjacent to 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 the data modulated by phase shift modulation comprises one or more channel bits, wherein each said channel bit is represented by one or more waves selected from the range of one to one hundred waves, and the phase of said one or more waves is changed over for each said channel bit; 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, and wherein the objective lens has a numerical aperture NA of from 0.85 to 0.9.