OPTICAL INFORMATION RECORDING MEDIUM

摘要

An optical information recording medium recordable at a high density two times or more higher than that of currently-used CD-Rs by optimally determining the thicknesses of a recording layer and a reflecting layer. The optical information recording medium comprises the recording layer formed on a transparent substrate having a spiral pregroove formed thereon, wherein a track pitch Tp of the pregroove is 1.0 µm≦Tp≦1.2 µm and a thickness Dg of the recording layer on the pregroove is 80 nm≦Dg≦120 nm.