Single-Beam Overwrite of In<SUB>3</SUB>SbTe<SUB>2</SUB> Phase-Change Optical Disk

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  • In<SUB>3</SUB>SbTe<SUB>2</SUB>相変化光ディスクのオーバライト特性
  • In3SbTe2相変化光ディスクのオーバライト特性
  • In3SbTe 2ソウ ヘンカ ヒカリ ディスク ノ オーバライト トクセイ

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Abstract

Single-beam overwrite performance of the 5.25 inch diam. In3SbTe2 phase-change optical disk was examined at a constant angular velocity of 1800 rpm (v=5-10 m/s). The carrier-to-noise ratio of more than 55 dB and the overwrite modulation of −40 dB were obtained for overwrite frequencies of 2 and 3.7 MHz using a low power laser diode of 30 mW at the wavelength 830 nm. This good erasability was found to be supported by a new erase mode called the “winking erase mode”. This disk presents a highly linear recording density and a long reading data retention time.

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