OPTICAL RECORDING MEDIUM, PRODUCTION METHOD OF OPTICAL RECORDING MEDIUM, OPTICAL RECORDING METHOD AND OPTICAL REPRODUCING METHOD FOR OPTICAL RECORDING MEDIUM

摘要

An optical recording medium for recording lands/grooves by DWDD (Domain Wall Displacement Detection), wherein the depth d (nm) of a groove (3) in a magneto-optical recording medium is selected as 3 lambda /8n < d < 1 lambda /2n ... (1) or 1 lambda /2n < d < 3 lambda /4n ... (2) so as to balance land characteristics with groove characteristics.