Optical information recording medium, manufacturing method, recording and reproduction method, and recording/reproduction device

摘要

An optical information recording medium comprises a transparent substrate 1 on which an information layer 21 is disposed, the information layer 21 comprising a recording layer 3 and a dielectric layer 2, and the recording layer 3 containing Te, O and M (wherein M is one or more elements selected from Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ru, Rh, Pd, Ag, In, Sn, Sb, Hf, Ta, W, Re, Os, Ir, Pt, Au and Bi), wherein a content ratio of 0-atom in the recording layer ranges from 25 atomic percent to 60 atomic percent, and a content ratio of M-atom therein ranges from 1 atomic percent to 35 atomic percent, and a refractive index n of the dielectric layer 2 is not less than 1.5 . Accordingly, a write-once optical information recording medium, from which excellent recording reproduction characteristics with a high C/N ratio can be obtained even for recording and reproduction of high density information using a violet laser beam, is provided as well as a manufacturing method, a recording and reproduction method and a recording/reproduction device for the same.