In-Ag-Te-Sb Phase Change Recording Media at Compact Disk Linear Velocity

Abstract

The feasibility of In-Ag-Te-Sb phase change recording media was investigated at an actual compact disk (CD) linear velocity. The composition of 0.5 at% V-doped In 3.8 Ag 12.4 Te 28.8 Sb 55.0 was used for the recording layer which we have reported previously. To improve the repetition property of overwriting, the disk structure was modified so that the cooling rate of the disk was increased. Consequently, recording jitter of less than 30 ns and modulation of more than 60% were maintained up to 2000 repetitions of overwriting when eight-fourteen modulation (EFM) signal with pulse-train division was applied.