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Proceedings Paper

Microstructure-property relationship in nitrogen-doped Ge2Sb2Te5 phase-change optical recording media
Author(s): Myong R. Kim; Hun Seo; Tae H. Jung; Jeong-Woo Park; Cheong Yeon
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Paper Abstract

Phase-change optical data storage is basically based on the difference in optical properties between amorphous and crystalline phases of a recording medium. It has been known that the physical properties including reflectance and thermal conductivity of a material basically depend on the chemical composition of materials and their microstructure. Lately, the manipulation of chemical composition in GeSbTe-based chalcogenide that is one of the most promising candidate materials for phase-change recording medium was tried by doping a small amount of nitrogen in Ge-Sb-Te phase-change optical disks. From the earlier work, an enhanced media cyclability was achieved in PPM recording at the wavelength of around 780 nm. The goal of this research is to investigate the variation of thermal, optical and dynamic properties, and their correlation to microstructure in nitrogen-doped Ge2Sb2Te5 phase-change recording media. Primary endeavors focused on the dependence of nitrogen doping on crystallization temperature, reflectance, initializing power level, CNR and overwrite jitter at the wavelength of 650 nm and pulse-width modulation (PWM) recording, leading to higher storage density.

Paper Details

Date Published: 23 October 1998
PDF: 4 pages
Proc. SPIE 3401, Optical Data Storage '98, (23 October 1998); doi: 10.1117/12.327945
Show Author Affiliations
Myong R. Kim, LG Corporate Institute of Technology (South Korea)
Hun Seo, LG Corporate Institute of Technology (South Korea)
Tae H. Jung, LG Corporate Institute of Technology (South Korea)
Jeong-Woo Park, LG Corporate Institute of Technology (South Korea)
Cheong Yeon, LG Corporate Institute of Technology (South Korea)

Published in SPIE Proceedings Vol. 3401:
Optical Data Storage '98
Shigeo R. Kubota; Tomas D. Milster; Paul J. Wehrenberg, Editor(s)

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