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Optical recording method, optical recording apparatus and optical storage medium

A technology for optical recording and recording lines, applied in the direction of optical recording/reproduction/erasing methods, optical recording heads, optical recording systems, etc., can solve the problem of large erasing power Peh, difficulty in fully ensuring initial recording characteristics or rewriting characteristics, Issues such as difficulty in securing rewrite features sufficiently

Inactive Publication Date: 2008-12-03
TAIYO YUDEN KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these methods, since the erasing power Peh at a high recording linear velocity is large, it is difficult to sufficiently ensure the initial recording characteristics or rewriting characteristics; or because the erasing power PeL at a low recording linear velocity is low, it is difficult to sufficiently ensure rewriting. write feature

Method used

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  • Optical recording method, optical recording apparatus and optical storage medium
  • Optical recording method, optical recording apparatus and optical storage medium
  • Optical recording method, optical recording apparatus and optical storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A-1

[0142] On a substrate 1 made of polycarbonate resin with a diameter of 120 mm and a plate thickness of 0.6 mm, various layers described below were formed. Grooves were formed on the substrate 1 with a channel pitch of 0.74 μm. The groove depth is 25 mm, and the ratio of the groove width to the land width is about 40:60. Among them, the groove is convex when viewed from the incident direction of the recording / reproducing or erasing laser light.

[0143] First, exhaust the vacuum container to 3×10 -4 After Pa, at 2×10 -1 In the argon atmosphere of Pa, 20mol% SiO was added 2The first protective layer 2 with a layer thickness of 70 nm was formed on the substrate 1 by a high-frequency magnetron sputtering method using a ZnS target.

[0144] Next, a recording layer 3 with a layer thickness of 16 nm was sequentially laminated using a four-element single alloy target of Ge-In-Sb-Te, and then a second protective layer with a layer thickness of 16 nm was laminated using the same mat...

Embodiment A-2

[0155] Using the same optical recording medium A as in Example A-1, recording and evaluation were performed under the same conditions as in Example A-1 except that the erasing power Pe was changed to 3.8 [mW]. R0 was 17.4, and R1 after irradiating a laser with erasing power Pe=3.8 [mW] once was 17.5 (R1 / R0=1.006).

[0156] The initial characteristics and overwrite recording characteristics are shown in Table 1. The jitter of DOW0 is 6.8%, the jitter of DOW1 is 8.6%, and the jitter of DOW9 is 7.9%. In addition, although not described, DOW10000 has a jitter of 9.2%, and the characteristics are always stable even after rewriting, and the recording characteristics are as good as in Example A-1.

Embodiment A-3

[0158] Using the same optical recording medium A as in Example A-1, recording and evaluation were performed under the same conditions as in Example A-1 except that the erasing power Pe was changed to 5.6 [mW]. R0 was 17.4, and R1 after irradiating laser light with erasing power Pe=5.6 [mW] once was 17.9 (R1 / R0=1.029).

[0159] The initial characteristics and overwrite recording characteristics are shown in Table 1. DOW0 jitter is 7.0%, DOW1 jitter is 8.7%, and DOW9 jitter is 8.4%. In addition, although not described, the jitter of DOW10000 was 9.5%, and the characteristics were always stable even after rewriting, and the recording characteristics were as good as in Example A-1.

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Abstract

An optical storage medium comprising: a substrate; a recording layer for recording a recorded mark representing information to be recorded by irradiating a recording light beam onto the recording layer in accordance with a recording pulse pattern of recording pulses rising from an erasing power and formed between a recording power larger than the erasing power and a bottom power smaller than the erasing power and of erasing pulses rising from the bottom power to the erasing power. The recording layer has been initialized with an initialization laser beam having the erasing power satisfying expressions (1) and (2): 1.000<(R1 / R0)<1.030 (1); 0.030<(R10 / R0)-(R1 / R0)<0.150 (2), in which R0 is a reflectivity exhibited by an un-recorded section of the recording layer, on which no data has ever been recorded, when irradiated with a reproducing light beam, R1 is a reflectivity exhibited by the un-recorded section when irradiated with the reproducing light beam after irradiated once with a light beam having the erasing power, and R10 is a reflectivity exhibited by the un-recorded section when irradiated with the reproducing light beam after irradiated ten times with a light beam having the erasing power.

Description

[0001] This application is a divisional application based on the invention patent application with application number: 200510004793.5, application date: January 26, 2005, and invention title: "optical recording method, optical recording device and optical recording medium". technical field [0002] The present invention relates to an optical recording method, an optical recording device, and an optical recording medium for recording, erasing, and reproducing information by irradiating light (for example, laser light). The present invention particularly provides an optical recording method, an optical recording device, and an optical recording medium, which can obtain a good optical recording at a high linear velocity (high multiple speed) on a rewritable phase-change recording medium such as an optical disc or an optical card. Override properties. [0003] In addition, an optical recording method, an optical recording device, and an optical recording medium are provided. On a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/0045G11B7/005G11B7/0055G11B7/125G11B7/006G11B7/1267
Inventor 田畑浩松本郁夫德井健二米原和男下舞贤一
Owner TAIYO YUDEN KK
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