Recording medium and apparatus and method for manufacturing the same

摘要

A recording medium comprises pairs of groove tracks (12) and land tracks (13) provided side by side while being bent periodically, a plurality of land prepits (14) previously formed on the land tracks and carrying information about the groove tracks, and a recording layer (15) formed on at least the groove tracks (12) and the land tracks (13). The land prepits (14) have a radius of mean curvature (14R) smaller than a radius of mean curvature (12R) of sides (12a) of the groove tracks in land-prepit absent regions of the land prepits and are defined by curved surfaces continuously extending from the sides (12a) of the groove tracks. Those sides (12b) of the groove tracks which face the continuous curved surfaces (14a) of the land prepits are curved surfaces that stricture the groove tracks.