High density optical recording media and a method for preparing the same

摘要

A phase-change recording material of metal-ceramic combination consisting of 80-98 at% 70Sb-(5-15)In-(15-25)Sn alloy and 2-20 at% 80ZnS-20SiO 2 enabling 2T mark formation and lower jitter values for write-once-read-many times (WORM) optical recording media for high density L2H recording comprising
(a) 1.1 mm pre-grooved substrate
(b) 100-200nm reflective layer
(c) 5-20 nm First dielectric layer
(d) 50-80 nm Second dielectric layer
(e) 6-18nm phase-change material sputtered from a metal-ceramic target comprising of 80-98 at% 70Sb-(5-15In)-(15-25)Sn alloy and 2-20 at% 80ZnS-20SiO 2 ceramic to achieve smaller mark formation in high density optical recording and
(f) 80-120 micron a polycarbonate cover layer.