Crystallization process of Sb-Te alloy films for optical storage
- 1 August 1988
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 64 (3) , 1000-1004
- https://doi.org/10.1063/1.341908
Abstract
Sb-Te alloy films are developed as rewritable optical recording materials based on amorphous crystalline phase transformations. The crystallization process of Sb-Te sputtered films is systematically studied through measurement of recording characteristics to solve the trade-off problem between data (amorphous) stability and erasing sensitivity. Sb2Te3 is shown to be the best practical phase change medium, having room-temperature stability in amorphous states, short erasing times, and potentially good reversibility. The carrier-to-noise ratio of 50 dB in writing and a decrease in the carrier level of over 30 dB in erasing are achieved in dynamic measurement with a single beam optical head. These favorable properties are attributable to the wide composition margin for a single phase formation in the Sb-Te alloy system.This publication has 8 references indexed in Scilit:
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