High performance media for optical recording

摘要

A recording element includes a substrate and on it an optical recording and then a light reflecting layer. The optical recording layer contains TeaGebCcHdOe, where; a + b + c + d + e = 100 at%, and 10 b 60, 5 c 35, 10 d 35, e /- 0. The optical recording layer thickness t is 0.7 Tmin t 1.3 Tmin (where Tmin is minimum reflectivity at minimum thickness) and includes one or more sublayers which may have different compositions. Also claimed is the element as above in which the recording layer has a graded composition. Also claimed is a process for making the element by sputtering the compositions of the optical recording layer and reflecting layer.