Patent ID: 7167436

Claim:
An optical recording medium for reproducing information using a light beam, comprising: a disk-shaped transparent substrate; servo areas and data areas formed on said substrate; and pits formed on said servo areas, wherein said servo areas are formed on flat sections of said substrate, said data areas are formed in grooves of said substrate, said servo areas and data areas are provided alternately in the circumferential direction of said substrate to thereby form information tracks, wherein a depth D G of said grooves satisfies an expression of D G (λ/N)<0.16, where λ is a wavelength of the light beam and N is an index of refraction of said substrate, wherein a distance L s between an edge of said groove and a pit closest thereto satisfies an expression of L s >1.2 FWHM, where FWHM is a full width at half maximum of said light beam in the track direction, and wherein a track pitch Tp of said information track satisfies an expression of Tp<FWHM.