Material characterization and application of eutectic SbTe-based phase-change optical recording media

Michikazu Horie; Takashi Ohno; Natsuko Nobukuni; Kenjirou Kiyono; Takao Hashizume; Masaaki Mizuno

doi:10.1117/12.453380

10 January 2002 Material characterization and application of eutectic SbTe-based phase-change optical recording media

Michikazu Horie, Takashi Ohno, Natsuko Nobukuni, Kenjirou Kiyono, Takao Hashizume, Masaaki Mizuno

Proceedings Volume 4342, Optical Data Storage 2001; (2002) https://doi.org/10.1117/12.453380
Event: Optical Data Storage, 2001, Santa Fe, NM, United States

Abstract

A brief review is described on the material characterization and application of the Ge(Sb70Te30) + Sb alloy. A mechanism to enable fast crystalline growth is discussed based on its single phase, hexagonal crystalline structure. A competitive process of amorphization and re- crystallization during re-solidification is discussed with a simple simulation model, where it is suggested that continuous crystalline growth from the boundary of molten area assures no resolution limit in the formation of amorphous mark edge. Two important concepts of 'enhanced re- crystallization' and '2T-period divided pulse strategy' are proposed to fully utilize this class of material. The enhanced re-crystallization realizes precise amorphous mark size control, realizing high density multi-level recording. The 2T-period divided pulse strategy resolves a pre-mature amorphization issue due to an insufficient cooling period in the case of over 100MHz clock frequency for high speed recording. Finally, it is reported that 120 Mbps digital video recording and over 40GB multi-level recording on CD size single layer are feasible.

Citation Download Citation

Michikazu Horie, Takashi Ohno, Natsuko Nobukuni, Kenjirou Kiyono, Takao Hashizume, and Masaaki Mizuno "Material characterization and application of eutectic SbTe-based phase-change optical recording media", Proc. SPIE 4342, Optical Data Storage 2001, (10 January 2002); https://doi.org/10.1117/12.453380

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