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Rewritable optical data storage medium

A technology of optical data and storage media, applied in the direction of data recording, information storage, optical record carrier, etc., can solve more than one other problem

Inactive Publication Date: 2006-04-12
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice both mechanisms will occur simultaneously, but in general there will always be one mechanism that outperforms the other in terms of efficiency or speed

Method used

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  • Rewritable optical data storage medium

Examples

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Effect test

example C

[0037] Examples C, D, G and H (according to the invention)

[0038] figure 2 Among them, a rewritable optical data storage medium for high-speed recording with a laser beam 10 has a substrate 1 and stacked layers 2 thereon. Stack layer 2 has: made of (ZnS) 80 (SiO 2 ) 20 The first dielectric layer 3 made has a thickness of 120nm; made of (ZnS) 80 (SiO 2 ) 20 The prepared second dielectric layer 5 has a thickness of 20nm; and the recording layer 4 has a phase change material including Ga, In and Sb alloy. The recording layer 4 has a thickness of 25 nm and is sandwiched between the first dielectric layer 3 and the second dielectric layer 5 . The ratio of Ga, In and Sb in the alloy is in figure 1 The ternary composition diagram of is represented by points C, D, G and H. The exact composition is shown in Table 1.

[0039] On the side away from the first dielectric layer 3, adjacent to the second dielectric layer 5, there is an Al metal reflective layer with a thickness ...

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Abstract

A description is given of a rewritable optical data storage medium having a phase-change recording layer on the basis of an alloy of Ga-In-Sb, which composition is situated within the pentagonal area TUVW in a triangular ternary composition diagram. These alloys show an amorphous phase stability of 10 year or more at 30° C. Such a medium is suitable for high speed recording, e.g. at least 30 Mbits / sec, such as DVD+RW, DVD-RW, DVD-RAM, high speed CD-RW, DVR-red and DVR-blue.

Description

technical field [0001] The present invention relates to a rewritable optical data storage medium that utilizes laser beams for high-speed recording. The medium includes a substrate carrying stacked layers. The stacked layers include a first dielectric layer, a second dielectric layer and a material containing Ga, A recording layer of a phase change material of an alloy of In and Sb interposed between the first and second dielectric layers. [0002] The invention also relates to the use of such an optical data storage medium in high data rate and high data stability applications. Background technique [0003] European patent EP 0387898 B1 discloses an embodiment of an optical data storage medium of the type mentioned in the opening paragraph. [0004] Optical data storage media based on the principle of phase change are attractive because they are capable of both direct overwrite (DOW) and high storage density, and are easily compatible with read-only optical data storage sy...

Claims

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Application Information

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IPC IPC(8): G11B7/24B41M5/26G11B7/243G11B7/257G11B7/258
CPCG11B2007/2431G11B7/24G11B2007/2571G11B7/257G11B2007/24314G11B7/00454G11B7/243G11B2007/25711G11B7/258
Inventor M·H·R·兰克霍斯特J·C·N·里佩斯H·J·博尔格J·H·J·鲁斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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