Patent ID: 7177262

Claim:
An information recording medium at least comprising: a substrate having a microscopic pattern including a continuous substrate of grooves formed with a groove portion and a land portion alternately; a recording layer formed on the microscopic pattern for recording information; and a light transmitting layer formed on the recording layer, wherein the microscopic pattern is formed with satisfying a relation of P≦λ/NA, wherein P is a pitch of the land portion or the groove portion, λ is a wavelength of reproducing light for reproducing the recording layer, and NA is a numerical aperture of an objective lens, and wherein the land portion is formed with wobbling so as to be parallel with each other for both sidewalls of the land portion, and wherein auxiliary information, based on data used supplementally when recording the information and a reference clock based on a clock used for controlling a recording speed when recording the information, is recorded alternately and continuously.