Optical information recording medium, method for producing the same, and method and apparatus for recording information thereon

摘要: The present invention provides a write-once optical information recording medium that can achieve high reflectance and favorable reproducing characteristics such C/N ratio sensitivity even when is recorded/reproduced with density. This includes transparent substrate at least one layer formed on the substrate. made of material including Te, O M, where M element selected from group consisting 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. A respect to light beam incident side after lower than before recording.