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Optical recording medium and method for optically recording data in the same

An optical recording medium, optical recording technology, applied in optical recording/reproducing/erasing methods, optical recording carriers, optical recording systems, etc., can solve problems such as difficulty in improving stability

Inactive Publication Date: 2007-05-02
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, since organic dyes degrade when exposed to sunlight, etc., it is difficult to improve long-term storage stability in the case of using organic dyes as recording layer materials

Method used

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  • Optical recording medium and method for optically recording data in the same
  • Optical recording medium and method for optically recording data in the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0090] The optical recording medium is manufactured as follows.

[0091] First, a polycarbonate substrate with a thickness of 1.1 mm and a diameter of 120 mm is placed on the sputtering device. Then, a sputtering method was used to sequentially form on the polycarbonate substrate: a reflective layer containing a mixture of Ag, Pd, and Cu with a thickness of 100 nm, containing ZnS and SiO 2 The mixture has a second dielectric layer with a thickness of 28nm, a second recording layer with a thickness of 4nm containing Zn as a main component, a first recording layer with a thickness of 8nm containing Si as a main component, and a first recording layer containing ZnS and SiO 2 The thickness of the mixture is 22nm for the first dielectric layer.

[0092] ZnS and SiO contained in the first dielectric layer and the second dielectric layer 2 ZnS and SiO 2 The molar ratio is 80:20.

[0093] In addition, a spin coating method is used to form a coating on the first dielectric layer using a re...

example 2

[0095] An optical recording medium was manufactured in the manner of Working Example 1, but in which a first recording layer containing Si as a main component and a second recording layer containing Ge as a main component were formed.

example 3

[0097] The optical recording medium was manufactured in the manner of Working Example 1, but in which a second recording layer containing C as a main component was formed.

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Abstract

An optical recording medium includes a substrate, a first recording layer formed on the substrate and containing an element selected from the group consisting of C, Si, Ge and Sn as a primary component, and a second recording layer located in the vicinity of the first recording layer and containing an element selected from the group consisting of C, Si, Ge and Sn and different from the element contained as a primary component in the first recording layer as a primary component. According to thus constituted optical recording medium, it is possible to optically record data therein and reproduce data therefrom by projecting a laser beam having a wavelength of 350 nm to 450 nm thereonto, which includes two or more recording layers and is capable of decreasing noise level and improving C / N ratio of a reproduced signal.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 03127775.6 filed on August 12, 2003, entitled "Optical Recording Medium and Method for Optically Recording Data in It". Technical field [0002] The present invention relates to an optical recording medium and a method of optically recording data in the optical recording medium, and more particularly to recording data therein and reproduced from it by projecting a laser beam having a wavelength of 350nm-450nm thereon An optical recording medium for data, which includes two or more recording layers, and can reduce the noise level of the reproduced signal and increase its C / N ratio, and also relates to a method of optically recording data in it. Background technique [0003] Optical recording media such as CDs, DVDs, etc. have been widely used as recording media for recording digital data. These optical recording media can be roughly divided into optical recording media that cannot write and rewrit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24G11B7/243B41M5/26G11B7/004G11B7/0045G11B7/24035G11B7/24056G11B7/24062G11B7/24067G11B7/241G11B7/2433
CPCG11B2007/24328G11B2007/25706G11B2007/25715G11B7/00455G11B7/259G11B2007/25716G11B7/2534G11B7/241G11B7/2433G11B2007/2571G11B2007/24312G11B2007/24304G11B7/243G11B7/24038G11B7/0045
Inventor 青岛正贵井上弘康三岛康儿
Owner TDK CORPARATION