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Optical recording medium and method of optical recording data therein

An optical recording medium, optical recording technology, applied in the direction of optical recording/reproduction/erasing method, optical recording carrier, optical recording system, etc., capable of solving problems such as formation difficulties

Inactive Publication Date: 2005-10-05
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Therefore, it becomes difficult to form a layer such as a recording layer on the light-transmitting layer as done in conventional optical recording media such as CD and DVD.

Method used

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  • Optical recording medium and method of optical recording data therein
  • Optical recording medium and method of optical recording data therein
  • Optical recording medium and method of optical recording data therein

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0127] The optical recording medium was produced in the following manner:

[0128] First, a polycarbonate substrate having a thickness of 1.1 mm and a diameter of 120 mm was set on a sputtering apparatus. Then, using the sputtering method, the ZnS and SiO containing 2 The second dielectric layer containing Cu as the main component and having a thickness of 6 nm, the second recording layer containing Cu as the main component and having a thickness of 6 nm, the first recording layer containing Si as the main component and having a thickness of 6 nm, and the first recording layer containing ZnS and SiO 2 mixture and a first dielectric layer with a thickness of 60 nm were sequentially formed on the polycarbonate substrate.

[0129] ZnS and SiO contained in the first dielectric layer and the second dielectric layer 2 A mixture of ZnS and SiO 2 The molar ratio is 80:20.

[0130] In addition, the first dielectric layer is coated with a resin solution prepared from dissolved acryl...

example 2

[0132] An optical recording medium was produced in the same manner as in Processing Example 1, except that the first recording layer was formed to contain Ge as a main component.

example 3

[0134] An optical recording medium was fabricated in the same manner as in Processing Example 1, except that the first recording layer was formed to contain C as a main component.

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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 Si, Ge, C, Sn, Zn and Cu as a primary component, and a second recording layer located in the vicinity of the first recording layer and containing Al as a primary component, the optical recording medium being constituted to be irradiated by a laser beam projected onto the side opposite from the substrate and the total thickness of the first recording layer and the second recording layer being equal to or thinner than 40 nm. According to the thus constituted optical recording medium, it is possible to decrease a noise level and improve a C / N ratio in a reproduced signal.

Description

technical field [0001] The present invention relates to an optical recording medium and a method of optically recording data on the optical recording medium, and, in particular, to an optical recording medium configured so as to transmit One side emits a laser beam to record data therein and reproduce data therefrom, it includes two or more recording layers, and can reduce the noise level of the reproduced signal and improve the C / N ratio (carrier-to-noise ratio) of the reproduced signal, It also relates to a method in which data is optically recorded. Background technique [0002] 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 broadly classified into: optical recording media that cannot write and rewrite data (ROM type optical recording media), such as CD-ROM and DVD-ROM; optical recording media that can write data but cannot rewrite data (once write-type optical r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/243G11B7/258
CPCG11B2007/24328G11B7/243G11B7/258Y10S430/146G11B2007/24308G11B2007/24312G11B2007/24304G11B7/0045G11B7/24038
Inventor 三岛康児青岛正贵井上弘康平田秀树宇都宫肇
Owner TDK CORPARATION
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