Improvement of Characteristics on Optical Disk at the Wavelength of Blue Laser.

DOI Web Site 3 References
  • AOKI Takanori
    Department of Electrical Engineering and Electronics, College of Engineering, Osaka Sangyo University
  • AKIDUKI Shin
    Department of Electrical Engineering and Electronics, College of Engineering, Osaka Sangyo University
  • SUZUKI Akio
    Department of Electrical Engineering and Electronics, College of Engineering, Osaka Sangyo University
  • MATSUSHITA Tatsuhiko
    Department of Electrical Engineering and Electronics, College of Engineering, Osaka Sangyo University
  • OKUDA Masahiro
    Department of Physics and Electronics, College of Engineering, Osaka Prefecture University

Bibliographic Information

Other Title
  • ブルーレーザー対応型光ディスクにおける特性の改善
  • ブルーレーザー タイオウガタ ヒカリディスク ニ オケル トクセイ ノ カイゼン

Search this article

Abstract

Thin films (of 50 nm thick) with a stacked structure (of 10150 layers) of In2O3 and ZnO have been deposited onto the glass and the polycarbonate substrates using the split target consisting of In2O3 and ZnO by a pulsed laser technique with an ArF excimer laser. A relation of the transmittance change ΔT at the wavelength of 400 nm between the annealed state (480°C × 20 min) and the as-deposited state versus the number of layers for the structure fabricated at the trace ratio of In2O3 : ZnO = 1 : 1 was obtained. The structure with 20 layers showed the maximal value of ΔT. SEM observation revealed that the surfaces of these films were enough smooth to use in static or revolution tests for'write'. AFM observation showed that surface roughness of the as-deposited state and the annealed state were Ra of 0.76 nm and Ra of 2.25 nm respectively. A peak power dependence of CNR of 3T signal (λ = 406 nm, NA = 0.65) at a linear velocity of 5 m/s and a read power of 0.6 mW was measured for the disk samples with 60-layers fabricated for the revolution tests. That the write power of less than 3 mW was required and maximal value of CNR = 67 dB was obtained. The values of CNR could be improved by optimizing the number of layers and the film compositions.

Journal

  • Shinku

    Shinku 45 (3), 247-250, 2002

    The Vacuum Society of Japan

References(3)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top