Optical Memories. Stress-Balanced Design of Center Aperture Detection-Magnetic Super-Resolution (CAD-MSR) Single-Sided Disk with 0.5-mm-Thick Substrate.

  • Takamori Nobuyuki
    Optical Disk Systems Development Center, Sharp Corporation, 2613-1 Ichinomoto-cho, Tenri-shi, Nara 632-8567, Japan
  • Tajima Hideharu
    Optical Disk Systems Development Center, Sharp Corporation, 2613-1 Ichinomoto-cho, Tenri-shi, Nara 632-8567, Japan
  • Takahashi Akira
    Optical Disk Systems Development Center, Sharp Corporation, 2613-1 Ichinomoto-cho, Tenri-shi, Nara 632-8567, Japan

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  • Stress-Balanced Design of Center Aperture Detection-Magnetic Super-Resolution (CAD-MSR) Single-Sided Disk with 0.5-mm-Thick Substrate

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A single-sided magneto-optical (MO) disk with a thin substrate was previously studied in a stress-balanced disk in order to prevent disk deformation in a wide temperature and humidity range. We succeeded in the suppression of transitional disk tilt by developing new UV resins. Environment-proof mechanical characteristics to enable mobile use were satisfied for a high-density disk with a thin substrate. In this paper, we report that disk tilt within ±0.5 mrad (±0.03 degree) was achieved in a 0.5-mm-thick and 50-mm-diameter disk.

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