V AND TI DOPING EFFECT ON IN-AG-TE-SB OPTICAL-PHASE CHANGE REWRITABLE DISC

In-Ag-Te-Sb is known as one of the alloys suitable for optical phase change recording, which has a high erasability at the linear recording velocity of around 7 m/s. The phase change rewritable recording succeeded at the linear recording velocity of 1.4 m/s with 0.5 at.% doping of Ti or V atoms, which delayed the crystallization time drastically, but maintained the high erasability. It was possible to make 10(3) repetition recordings with jitter in the reproduced signal of less than 40 ns, when the eight-fourteen modulation (EFM) signal, which is generally used for compact discs (CD), was applied.