REFLECTION LAYER OR SEMI-TRANSPARENT REFLECTION LAYER FOR USE IN OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING MEDIUM AND SPUTTERING TARGET FOR USE IN THE OPTICAL INFORMATION RECORDING MEDIUM

摘要

A novel reflective layer or semi-transparent reflective layer for use in optical information recording media with suppressed growth of Ag crystal grains and having a high reflectivity and excellent structural stability comprising an Ag based alloy containing from 0.1 to 3.0% of Nd in total of at least one element selected from the group consisting of Nd, Sn and Ge; and/or containing 0.1% or more of at least one rare earth element.