Silver alloy reflective films for optical information recording media, silver alloy sputtering targets therefor, and optical information recording media

Abstract

A silver alloy reflective film is used in an optical information recording medium and contains silver as a main component, a total of 0.01 to 3 atomic percent of at least one of Bi and Sb, and a total of 3 to 42 atomic percent of at least one of Cu, Ge, Mg, and Zn. The silver alloy reflective film preferably further contains 0.1 to 3 atomic percent of yttrium. An optical information recording medium includes the silver alloy reflective film. A sputtering target for depositing the silver alloy reflective film contains silver as a main component, 0.01 to 3 atomic percent of Sb (or 0.03 to 10 atomic percent of Bi), and a total of 3 to 42 atomic percent of at least one of Cu, Ge, Mg, and Zn.

Dependencies are inferred from the claim text.