Evaluation of Thermal Tolerance in Initializing Thin Optical Discs
スポンサーリンク
概要
- 論文の詳細を見る
We simulated a temperature change in thin phase-change optical discs that have various substrate thicknesses in order to evaluate the thermal tolerance of a polycarbonate substrate during DC sheet beam initialization. We simulated the temperature change by applying a finite difference method to the partial differential equation for heat conduction. In discs with substrates on both sides, the difference between the sums of the given heat while the temperature of each substrate is more than or equal to glass transition temperature for a disc with a 100-μm-thick substrate on both sides and a disc with a 5-μm-thick substrate on one or both sides, was within 5%. The sum of the given heat to the substrate for a disc with a substrate on one side, was about 1.5 times larger than that for a disc with substrates on both sides. These results showed that the initialization margin needed to obtain a good-quality initialization state with no thermal damage to the substrate is smaller for a disc with a substrate on one side than for that with substrates on both sides.
- 2007-06-30
著者
-
Shintani Toshimichi
Central Research Laboratory Hitachi Ltd.
-
Ogino Yoshiaki
Optical System Solutions Group, Hitachi Computer Peripherals Co., Ltd., Nakai, Kanagawa 259-0180, Japan
-
Kondo Masaharu
Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan
-
Soga Kazuhiro
Optical System Solutions Group, Hitachi Computer Peripherals Co., Ltd., Nakai, Kanagawa 259-0180, Japan
-
Shintani Toshimichi
Central Research Laboratory, Hitachi, Ltd., Kokubunji, Tokyo 185-8601, Japan
関連論文
- Control of Aperture Size of Optical Probes for Scanning Near-Field OpticalMicroscopy Using Focused Ion Beam Technology
- A Cavity-SNOM (Scanning Near-field Optical Microscopy) Head Using a Laser Diode
- Far-Field and Near-Field Optical Readings of under-50nm-Sized Pits : Optics and Quantum Electronics
- Multilayer Disk Reduced Interlayer Crosstalk with Wide Disk-Fabrication Margin
- Interlayer Crosstalk Reduction by Controlling Backward Reflectivity in Multilayer Optical Discs
- Evaluation of Thermal Tolerance in Initializing Thin Optical Discs
- Evaluation of Thermal Tolerance in Initializing Thin Optical Discs
- Analyses of Signals from Dual-Layer Phase Change Optical Disks
- A New Super-Resolution Film Applicable to Read-Only and Rewritable Optical Disks
- Read-Out Signal Simulation of an Optical Disk Having an Oxide Super-Resolution Film