Crystallization Characteristics of Phase-Change Optical Disks
- 1 November 1989
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 28 (11A) , L1985
- https://doi.org/10.1143/jjap.28.l1985
Abstract
A new crystallization method for erasing recorded amorphous marks in phase-change optical disks, based on irradiation with a high power laser beam producing temperatures above the melting point of the media is proposed. Erased medium reflectivity for a prepared Sb56Te44 disk shows an intermediate value between the crystalline and amorphous states, which corresponds to a residual signal of less than -35 dB. The reflectivity after erasing is constant over a wide range of erasing power.Keywords
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