Patent ID: 6153355
Filing Date: 2000-11-28
Classification: G11B,Y10S

Abstract:
A method for producing the optical recording medium of chase change type comprising a transparent substrate and a recording layer on the transparent substrate, wherein said recording layer comprises Te-based thin film and reactive thin film mixed with each other, said recording layer constituting Te crystalline phase dispersed in amorphous phase to reduce reflectance, said Te-based thin film is in contact with said reactive thin film, said Te-based thin film is formed from a Te-based material containing at least 95 at % of Te; and said reactive thin film is formed from a (Ge, Sb)-based material mainly comprising Ge and/or Sb, at least one of the Te-based material and the (Ge, Sb)--based material contains a metal, M, which is at least one element selected from the group consisting of Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, In, Sn, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Hf, Ta, W, Au, Tl, Pb and Bi; andsaid element M is present in the recording layer at a contant of not more than 5 at % and said element M is present in the Te-based material at a content of not more than 5 at %, said method comprising the steps of:mixing the material constituting the Te-based thin film and the material constituting the reactive thin film by irradiating a laser beam to form recording marks; andthe recording marks are not crystallizable under the same conditions as the conditions used for mixing the Te-based thin film and the reactive thin film.