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Write-once optical recording medium and process for manufacturing the same

A technology of an optical recording medium and a manufacturing method, which is applied in the directions of optical recording medium, recording/reproducing by optical method, data recording, etc., can solve the problems of difficult storage reliability and productivity, low productivity, low film deposition rate, etc., Achieves good storage reliability, improved productivity, and high film deposition rates

Inactive Publication Date: 2012-08-01
SONY GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials need to be deposited by radio frequency (RF) sputtering, and thus, there is a problem that the film deposition rate is very low and the productivity is low
Therefore, it is difficult to ensure storage reliability and productivity at the same time

Method used

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  • Write-once optical recording medium and process for manufacturing the same
  • Write-once optical recording medium and process for manufacturing the same
  • Write-once optical recording medium and process for manufacturing the same

Examples

Experimental program
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Effect test

no. 1 approach

[0038] (1-1) Structure of write-once optical recording medium

[0039] figure 1 is a schematic sectional view showing a configuration example of the write-once optical recording medium according to the first embodiment of the present invention. The write-once optical recording medium 10 has a configuration in which a reflective layer 2, a first protective layer 3, an inorganic recording layer 4, a second protective layer 5, and a light-transmitting layer 6 are sequentially laminated on a substrate 1. superior.

[0040] In this write-once optical recording medium 10 according to the first embodiment, recording or reproduction of an information signal is performed by irradiating the inorganic recording layer 4 with a laser beam from the light-transmitting layer 6 side. For example, by condensing a laser beam having a wavelength in the range of 400 nm to 410 nm with an objective lens having a numerical aperture in the range of 0.84 or more and 0.86 or less, and irradiating the ...

no. 2 approach

[0084] figure 2 is a schematic sectional view showing a configuration example of a write-once optical recording medium according to a second embodiment of the present invention. It should be noted that the same components as those of the write-once optical recording medium according to the first embodiment are denoted by the same reference numerals, and descriptions of these components will be omitted. Such as figure 2 As shown, the write-once optical recording medium 10 according to the second embodiment is different from the write-once optical recording medium 10 according to the first embodiment in that further between the first protective layer 3 and the inorganic recording layer 4 A heat accumulation layer 7 is provided. The heat accumulation layer 7 contains, for example, ZnS-SiO 2 etc. as the main component of the dielectric material. From the standpoint of improving the recording power margin, the thickness d of the second protective film 5 is preferably 11 nm to...

no. 3 approach

[0090] (3-1) Structure of write-once optical recording medium

[0091] image 3 is a schematic sectional view showing a configuration example of a write-once optical recording medium according to a third embodiment of the present invention. It should be noted that the same components as those of the write-once optical recording medium according to the first embodiment are denoted by the same reference numerals, and descriptions of these components will be omitted. Such as image 3 As shown, the write-once optical recording medium 10 has a structure in which a first recording layer (L0 layer) L0, an interlayer (interlayer) 8, a second recording layer (L1 layer) L1 and optical The transmissive layer 6 is sequentially laminated on the substrate 1 . The first recording layer L0 is a configuration in which a reflective layer 2 , a first protective layer 3 , an inorganic recording layer 4 , and a second protective layer 5 are sequentially laminated on a substrate 1 . The second ...

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Abstract

The invention discloses a write-once optical recording medium and a process for manufacturing the same. The write-once optical recording medium comprises a inorganic recording layer; a protection layer composed mostly of indium oxide and tin oxide; a heat storage layer disposed on at least one surface of the inorganic recording layer, and the inorganic recording layer and the heat storage layer are adjacent to each other; the heat storage layer has a heat conductive rate lower than the heat conductive layer of the protection layer.

Description

[0001] This application is a divisional application of a patent application with an application date of November 25, 2008, an application number of 200880116828.6, and an invention title of "Write-once Optical Recording Medium and Its Manufacturing Method", the entire content of which is hereby incorporated by reference. technical field [0002] The present invention relates to write-once optical recording media. Specifically, the present invention relates to a write-once optical recording medium having an inorganic recording layer and a method of manufacturing the same. Background technique [0003] So far, CDs (Compact Discs), DVDs (Digital Versatile Discs), and the like have led the market for optical recording media. However, in recent years, with the realization of high-definition television and the rapid increase in the amount of data handled by PCs (Personal Computers), optical recording media are expected to have a larger capacity. In order to meet such demands, opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/257G11B7/243G11B7/24G11B7/24035G11B7/24038G11B7/2433G11B7/2437G11B7/254G11B7/2578
CPCG11B2007/25708G11B2007/24324G11B7/2578G11B7/2437G11B2007/25713G11B2007/25715G11B2007/24314G11B7/2433G11B2007/2432G11B2007/2571G11B2007/24312G11B2007/24304Y10T428/21
Inventor 和田豊
Owner SONY GRP CORP
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