| 摘要 |
PURPOSE:To obtain the title highly durable optical recording medium wherein information is rewritable and whose recording signals are not deteriorated by forming an optical recording layer contg. Ga and Sb in specified composition. CONSTITUTION:An optical recording layer 2 contg., by atomic ratio, 10-60% Ga and 40-90% Sb is formed on a substrate 1 made of plastics such as polymethyl methacrylate, glass, etc. Then a protective film 3 of synthetic resins, SiO2, Al2O3, etc. is furnished on the layer 2 to obtain an optical recording medium. Into the layer 2, if necessary, 0 20%, by atomic ratio, >= 1 kind of metal selected from Al, Si, P, S, Zn, Ge, As, Se, In, Sn, Te, Bi and Pb is incorporated to prevent the segregation of Ga and further improve the contrast and sensitivity to light. The protective layer 3 consisting of an UV ray-curing resin, and SiO2 film, etc. is provided on the layer 2 and used. A highly durable optical recording medium having excellent C/N, etc. and wherein information can be rewritten is thus obtained. |
