Patent ID: 6280810
Filing Date: 2001-08-28
Classification: G11B,Y10S,Y10T

Abstract:
An information recording medium comprising a substrate, a first protective layer formed on the substrate, a recording layer formed on the first protective layer, and a second protective layer formed on the recording layer, the first protective layer having a thickness in a range from 65 nm to 130 nm, the second protective layer having a thickness in a range from 15 nm to 45 nm, the recording layer having a thickness in a range from 15 nm to 35 nm and being composed of a phase-change alloy with the composition in terms of atomic percentage being represented by the formulaAg.sub.a In.sub.b Sb.sub.c Te.sub.d where 0<a.ltoreq.6, 3.ltoreq.b.ltoreq.15, 50.ltoreq.c.ltoreq.65, 20.ltoreq.d.ltoreq.35, a+b+c+d=100,the recording medium being configured to provide capabilities of reading, writing and overwriting of information at linear rotation rates ranging from 1.2 m/s to 11.2 m/s.