Recording medium and recording medium master, and method of manufacturing recording medium

摘要

A recording medium and a recoding medium master, and a method of manufacturing the recording medium which comply with the standard of recording/reproducing characteristic established in the MD standard while enabling precise discrimination of the pit track and groove track and optical detection of the pits by optical pickup and the like are provided. Pits and grooves are arranged on a surface of a disc-shaped substrate so as to form a spiral-shaped track. The track pitch of the pits is wider than that of the grooves and the ratio is from 1.00 exclusive to 1.13 inclusive. It is preferable that the track pitch of the grooves is from 1.50 µm inclusive to 1.70 µm exclusive. The width of the pits and grooves in the radial direction of the substrate is the same.