Title:
光学記録媒体
Document Type and Number:
Japanese Patent JP4164984
Kind Code:
B2
Abstract:
To provide a high density optical recording medium, capable of realizing the complete compatibility with a phase change recording medium with respect to an optical pickup or a drive device, using a short wavelength light for achieving a high recording density. The present invention provides an optical recording medium configuration for directly reading out the change of the reflectance without using the phase modulation method. An optical recording medium according to the present invention is an optical recording medium having a recording film of a single layer or multiple layer structure on a substrate (1), wherein the recording film is mainly made of an organic substance material layer (2) for absorbing and decomposing a laser beam, and generating the refractive index change as well as the reflectance of the optical recording medium with respect to a reproduction laser beam of a 380 nm to 450 nm wavelength is 15% to 25% before the decomposition, and 0% to 10% after the decomposition.
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Inventors:
Yuichi Sahi
Hidetoshi Watanabe
Masanobu Yamamoto
Hidetoshi Watanabe
Masanobu Yamamoto
Application Number:
JP2000086687A
Publication Date:
October 15, 2008
Filing Date:
March 27, 2000
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G11B7/0045; G11B7/005; G11B7/24; G11B7/24035; G11B7/24056; G11B7/24062; G11B7/244
Domestic Patent References:
| JP11167744A | ||||
| JP6076359A | ||||
| JP9115182A | ||||
| JP2155689A | ||||
| JP11031337A | ||||
| JP7140591A | ||||
| JP1221278A |
Attorney, Agent or Firm:
Yoshitsuno Kakuda
Hironobu Isoyama
Hidemori Matsukuma
Hironobu Isoyama
Hidemori Matsukuma