OPTICAL DATA RECORDING MEDIUM

摘要

PURPOSE:To obtain an optical data recording medium shortened in its erasing time by providing a recording membrane wherein at least one kind of an element among Ga and Pb is added to a ternary eutectic compsn. Ge15(+ or -2) Sb61.5(+ or -2)Te23.5(+ or -2) on a support. CONSTITUTION:An optical data recording medium is obtained by laminating a recording membrane wherein at least one kind of an element among Ga and Pb is added to a ternary eutectic compsn. Ge15(+ or -2)Sb61.5(+ or -2)Te23.5(+ or -2) on a support composed of glass and pref. contains 0.5-12.3at% of Ga+Pb per 100at% of Ge15(+ or -2)Sb61.5(+ or -2)Te23.5(+ or -2). When the Ge-Sb-Te ternary eutectic compsn. Ge15Sb61.5Te23.5 is doped with at least one kind of an element among Ga and Pb, said element becomes a crystal nucleus to make it possible to increase a crystallizing speed. Further, an erasing time becomes sufficiently short.