Potentiality of the Ag-In-Sb-Te Phase Change Recording Material for High Density Erasable Optical Discs

概要

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The feasibility of using Ag-In-Sb-Te phase change material for high density of directly overwritable optical discs has been studied. A linear density of 0.34 μm/bit with a track pitch of 0.74 μm is confirmed to be achievable with a light source wavelength of 680 nm, with an objective lens NA of 0.60 and the criteria of data-to-data jitter of less than 14% of the channel bit length. The recording characteristics are also studied using an optical system with a 635 nm red laser diode in order to investigate the attainment of a linear density of 0.267 μm/bit which is equivalent to the DVD-ROM (read only memory) specification.
社団法人応用物理学会の論文
1997-01-30