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Information recording medium

A technology of information recording and media, applied in information storage, data recording, temperature recording, etc., can solve the problems of inability to ensure the stability of amorphous phase, decrease of signal quality, decrease of crystallization temperature, etc., and achieve high-quality record preservation High performance, good record retention, and high erasing performance

Active Publication Date: 2011-06-08
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, since GeTe is replaced by SnTe, the concentration of Ge decreases
As a result, the optical change of the recording layer is reduced, which causes the problem of a decrease in signal quality, and the problem that the stability of the amorphous phase cannot be ensured due to a decrease in the crystallization temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0092] As Embodiment 1 of the present invention, an example of an optical information recording medium in which information is recorded and reproduced using laser light will be described. figure 1 A partial cross section of the optical information recording medium is shown.

[0093] Such as figure 1 The information recording medium 100 shown has the following structure: a first dielectric layer 102 is formed on one side surface of the substrate 101, a first interface layer 103 is formed on the surface of the first dielectric layer 102, and a first interface layer 103 is formed on the surface of the first interface layer 103. A recording layer 104 is formed on the surface, a second interface layer 105 is formed on the surface of the recording layer 104, a second dielectric layer 106 is formed on the surface of the second interface layer 105, and a light absorption correction layer is formed on the surface of the second dielectric layer 106. In the layer 107 , a reflection laye...

Embodiment approach 2

[0148] As a second embodiment of the present invention, an example of an optical information recording medium in which information is recorded and reproduced using laser light will be described. figure 2 A partial cross section of the optical information recording medium is shown.

[0149] Such as figure 2 The information recording medium 200 shown has the following structure: a reflective layer 207 is formed on one surface of a substrate 208, a second dielectric layer 206 is formed on the surface of the reflective layer 207, and a second dielectric layer 206 is formed on the surface of the second dielectric layer 206. Two interface layers 205, a recording layer 204 is formed on the surface of the second interface layer 205, a first interface layer 203 is formed on the surface of the recording layer 204, a first dielectric layer 202 is formed on the surface of the first interface layer 203, and further, A cover layer 201 is formed. The information recording medium of this ...

Embodiment approach 3

[0174] As a third embodiment of the present invention, an example of an optical information recording medium in which information is recorded and reproduced using laser light will be described. image 3 A partial cross section of the optical information recording medium is shown.

[0175] Such as image 3 The information recording medium 300 shown has a structure in which a substrate 315 , a second information layer 316 , an intermediate layer 308 , a first information layer 317 , and a cover layer 301 are sequentially arranged. In more detail, the second information layer 316 is sequentially arranged with a second reflective layer 314, a fifth dielectric layer 313, a third interface layer 312, a second recording layer 311, a second interface layer 310, and a second interface layer 310 on one surface of the substrate 315. Four dielectric layers 309 . The intermediate layer 308 is formed on the surface of the fourth dielectric layer 309 . The first information layer 317 has ...

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Abstract

In an information recording medium on and from which information is recorded and reproduced by applying light or electric energy, a recording layer which generates reversible phase change is formed so as to include a material containing Ge, Bi, Te and an element 'M' which material is expressed with (GeTe) x [(M 2 Te 3 ) y (Bi 2 Te 3 ) 1-y ] 100-x (mol %) wherein 'M' represents at least one element selected from A1, Ga and In, and 'x' and 'y' satisfy 80<= x<100 and 0<y<= 0.9, whereby the medium is obtained which ensures a high erasability and an excellent archival characteristic at a high linear velocity and in a wide range of linear velocities.

Description

technical field [0001] The present invention relates to an information recording medium for optically or electrically recording, erasing, rewriting, and reproducing information. Background technique [0002] The inventors have developed 4.7 GB / DVD-RAM (hereinafter, referred to as DVD-RAM) as a large-capacity rewritable phase-change information recording medium that can be used as data files and image files. Also, the corresponding 2x speed and the corresponding 3x speed DVD-RAM have already been commercialized. [0003] An example of a recording layer material practically used in DVD-RAM is Ge-Sn-Sb-Te (for example, refer to Japanese Patent Application Laid-Open No. 2001-322357). This Ge-Sn-Sb-Te is a material whose crystallization rate is higher than that of conventional high-speed crystallization materials such as Ge-Sb-Te (for example, refer to Japanese Patent No. 2584741). [0004] In order to realize a large-capacity information recording medium called 4.7 GB, i) make...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/24G11B7/24035G11B7/24038G11B7/243G11B7/2433G11B7/2437
CPCG11B2007/24316G11B7/2433G11B9/04H01L45/1625G11B7/266G11B7/24038G11B2007/2431H01L45/1233H01L45/04G11B2007/24314G11B7/00454G11B2007/24312H01L45/144H01L45/06Y10T428/21H10N70/231H10N70/826H10N70/8828H10N70/026G11B7/241B41M5/26
Inventor 儿岛理惠山田升
Owner PANASONIC CORP
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