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 on which an layer is disposed, the comprising and dielectric layer, containing Te, O M (wherein 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 Bi), wherein content ratio of O-atom in ranges 25 atomic percent to 60 percent, M-atom therein 1 35 refractive index n not less than 1.5. Accordingly, write-once medium, excellent reproduction characteristics with high C/N can be obtained even for density using violet laser beam, provided as well manufacturing method, method recording/reproduction device same.