OPTICAL RECORDING MEDIUM AND METHOD AND DEVICE FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide such an optical recording medium that readout signals with little distortion of waveform in the readout signal during reproducing information are obtained. SOLUTION: The optical recording medium has a groove information track and a land information track formed parallel to each other as a pair and periodically wobbling, a plurality of land prepits previously formed in the land information track to carry the information relating to the groove information track, and a recording layer formed on at least the groove information track and land information track. The land prepit is defined by a curved face which has the average radius of curvature smaller than the average radius of curvature of the side face of the groove information track in the segment where no land prepit is present and which is continued from the side face of the groove information track. The side face of the groove information track opposing to the continuous curved face of the land prepit is the curved face which narrows the groove information track.