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Optical recording medium

A technology for optical recording medium and recording layer, which is applied in the direction of optical recording carrier, data recording, temperature recording method, etc., and can solve the problems of excessive addition amount and affecting other characteristics

Inactive Publication Date: 2004-01-28
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the reasons for adding the aforementioned elements to the recording layer include improving high-speed crystallization and stability over time by adding each element, but there are problems such as affecting other characteristics if the amount is too large

Method used

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Embodiment Construction

[0017] The optical recording medium of the present invention includes a recording layer containing at least Sb and Mn, and further containing Te. Specifically, the composition ratio of the recording layer of the optical recording medium is represented by the following formula (1). In this formula (1), a, b, and c are represented by atomic %.

[0018] Sb a mn b Te c ……Formula 1)

[0019] In the formula, a, b, and c satisfy the conditions of 20≤a<80, 20

[0020] In the above-mentioned formula (1), when the Sb content rate a is too small, the crystal transition rate becomes sharply slow, and erasure of recorded information, that is, rewriting becomes difficult. Therefore, the content a of Sb is preferably 20 atomic % or more. On the other hand, when the content rate a is too large, the reflectance difference becomes smaller with phase change, and the modulation factor also becomes smaller.

[0021] In the above-mentioned formula (1), when the c...

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Abstract

There is provided an optical recording medium having a phase-change recording layer formed based on a drastically new concept of making the content of Mn still higher than the prior art while using Sb as a main component. The optical recording medium(1) has a recording layer(5) composed of a plurality of elements, and the recording layer(5) contains Sb, and also has an Mn content of more than 20 atomic % but not more than 40 atomic %, on condition that the total amount of all the elements composing the recording layer(5) is 100 atomic %.

Description

technical field [0001] The present invention relates to an optical recording medium having a phase-change type recording layer. Background technique [0002] In recent years, attention has been drawn to optical recording media capable of recording at high density and supplementing and rewriting (already recorded) recorded information. The phase-change optical recording medium among the supplementary and rewritable optical recording media changes the crystal state of the recording layer by laser irradiation to record information, and detects that the reflectance of the recording layer changes with the above-mentioned state. change, and replay the recorded information. This phase-change optical recording medium can rewrite information by modulating the intensity of a single laser. Furthermore, it is particularly attractive in that it can record and reproduce recorded information with a simple optical structure system compared with the optical system of a magneto-optical reco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/26G11B7/243
CPCG11B7/243G11B2007/24306Y10S430/146G11B2007/24314Y10T428/12701
Inventor 新开浩宇都宫肇
Owner TDK CORPARATION