| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical information recording medium realizing improvement of characteristics of a conventional molten system phase change type recording material in which a small number of overwrite recoding is performed. SOLUTION: At least, bone layer of the layers including the surfaces where a first and a second dielectric material layers 2 and 4 come in contact with a recording layer 3 is a layer composed of a dielectric material consisting of an oxide of a metal selected from the group consisting of Ti, V, Nb, Cr, Mo, W, Mn, Re, Fe, Ru, Os, Rh, Ir and Pt or a mixture of the oxide and zinc sulfide. The recording layer 3 is formed by using a material constituted of a system containing Ag, In, Sb and Te and a reflection layer 5 is formed by using Ag or an alloy containing >=90% Ag. The optical information recording medium is formed by sputtering using the dielectric material as a target and using a rare gas and oxygen. |
