Information storage medium

摘要

An optical disk comprises a polycarbonate substrate, a first protective layer, formed on the substrate and made of SiO2, a recording layer, formed on the first protective layer and made of an In-Sb-Te alloy, a second protective layer, formed on the recording layer and made of SiO2, and a surface protective layer, formed on the second protective layer and made of an ultraviolet curable resin. The recording layer has a composition of In50-xSb50TeyAuZ wherein x, y, and z are in atomic %, x=y+z, y>/=2z, and 1