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Optical recording medium, method for producing the same, and data recording method and data reproducing method for optical recording medium

A technology of optical recording medium and dielectric layer, which is applied in the manufacture of optical recording medium, recording/reproducing by optical method, optical recording medium, etc. The effect of production costs

Inactive Publication Date: 2006-09-20
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] However, it turns out that the phase-change material layer hitherto considered to be a "recording layer" does not actually function as a recording layer, and therefore, regarding the contribution of the phase-change material layer to the formation of recording marks, the signal characteristics by the materials used are There are still many uncertainties about what changes will result

Method used

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  • Optical recording medium, method for producing the same, and data recording method and data reproducing method for optical recording medium
  • Optical recording medium, method for producing the same, and data recording method and data reproducing method for optical recording medium
  • Optical recording medium, method for producing the same, and data recording method and data reproducing method for optical recording medium

Examples

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Embodiment 1

[0148] An optical recording medium sample having the same structure as the optical recording medium 10 shown in FIG. 1 was prepared in the following manner.

[0149] First, support substrate 11 was prepared by injection molding, which was made of polycarbonate in a disc shape measuring about 1.1 mm in thickness and about 120 mm in diameter, and had grooves 11a and lands 11b formed on its surface.

[0150] Next, this supporting substrate 11 is placed in a sputtering apparatus, and, on the groove 11a and land 11b forming side of the substrate, by sputtering, an approximately 20 nm-thick film consisting essentially of platinum (Pt) is successively formed. The reflective layer 21 is basically composed of ZnS and SiO 2 A dielectric layer 33 of about 100nm thick made of a mixture of (molar ratio = about 80:20), substantially composed of Sb 74.1 Te 25.9 (wherein, the numerical subscript is expressed as mole percent, hereinafter the same, except that the atomic number ratio is expre...

Embodiment 2

[0154] A sample of the optical recording medium according to Example 2 was prepared in the same manner as the sample of the optical recording medium according to Example 1 except that substantially only ZnS was used as the material for the dielectric layer 32 .

Embodiment 3

[0162] The optical recording medium according to Example 3 was prepared in the same manner as the optical recording medium sample according to Example 1, except that the thickness of the dielectric layer 32 was set to about 80 nm and the thickness of the dielectric layer 31 was set to about 50 nm. Medium samples.

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Abstract

An optical recording medium 10 is provided with a supporting substrate 11 and a light-transmitting layer 12, and further has between the light-transmitting layer 12 and the supporting substrate 11 a dielectric layer 31, a noble-metal oxide layer 23, a dielectric layer 32, a light absorption layer 22 and a dielectric layer 33. The second dielectric layer 32 contains as a main component ZnS or a mixture of ZnS and SiO 2 , and therein the proportion of ZnS to the sum of ZnS and SiO 2 is set at a value from 60 mole % to 100 mole %. Since the material of the second dielectric layer 32 has both high hardness and elasticity, and high thermal conductivity besides, excellent balance of thermal conductivity with layer hardness can be achieved and makes it possible to form fine recording marks in true shapes.

Description

technical field [0001] The present invention relates to an optical recording medium and a manufacturing method thereof, and, more particularly, to an optical recording medium in which recording marks are formed by emitting gas and a manufacturing method thereof. Furthermore, the present invention relates to a method of recording data on an optical recording medium and a method of reproducing data recorded on an optical recording medium, and, more particularly, to recording on a type of optical recording medium in which recording marks are formed by gas emission. A method of data and a method of reproducing data recorded on such an optical recording medium. Background technique [0002] In recent years, optical recording media represented by CDs (Compact Discs) and DVDs (Digital Versatile Discs) have been widely used as recording media for recording high-capacity digital data. [0003] Among CDs, there is a type of compact disc (CD-ROM), which can neither rewrite data nor re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24G11B7/26G11B7/00B41M5/26G11B7/241G11B7/007G11B7/24035G11B7/24047G11B7/24056G11B7/24062G11B7/243G11B7/2433G11B7/254G11B7/257
CPCG11B7/24065G11B7/243G11B7/257G11B7/241B41M5/26
Inventor 菊川隆福泽成敏小林龙弘
Owner TDK CORPARATION