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Optical recording medium

An optical recording and media technology, applied in optical record carriers, optical record carrier manufacturing, data recording, etc., can solve the problems of complex manufacturing process and bending of optical recording media, and achieve simplified manufacturing process, improved adhesive strength, high durability sexual effect

Inactive Publication Date: 2004-12-29
BEALL DEVERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, conventional optical recording media must have a passivation layer
Since the passivation layer is cured by UV light after coating the UV curable resin, the manufacturing process is complicated, and the optical recording medium may also be warped due to the heat generated during the curing of the UV curable resin

Method used

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Examples

Experimental program
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Effect test

example 1

[0044] Figure 4 is a cross-sectional view of an optical recording medium according to Example 1 of a preferred embodiment of the present invention.

[0045] The optical recording medium of Example 1 was manufactured through the following steps: Firstly, the substrate 40 was provided. The substrate 40 includes a pre-groove having a track pitch of 0.74 μm, a depth of 150 nm, and a width of 350 nm. The substrate 40 includes polycarbonate, and has a thickness of 0.6 mm.

[0046] 0.25 g of cyanine-based organic dye NK-4499 of Japanese company "Hayashibara" was dissolved in 10 ml of organic solvent "TFP" to obtain a dye solution. A dye solution is coated on the substrate 40 using a spin-coating technique, thereby forming a dye layer 41 . Here, spin coating was performed at a speed of 3000 rpm. The dye layer 41 is not formed on the outer edge portion of the substrate 40 .

[0047] The dye layer 41 formed on the substrate 40 was dried at a temperature of 80° C. for 20 minutes. ...

example 2

[0058] The optical recording medium of Example 2 was manufactured in the same manner as in Example 1, except for the following: the adhesive layer 43 was formed by MK-1010 manufactured by the inventors of the present invention, wherein MK-1010 had a viscosity of 650 cps, a glass transition temperature of 125° C., 6.3% shrinkage coefficient, and H hardness. In addition, the adhesive layer had a thickness of 40 μm, and the reflective layer was made of Ag-Cu-Au alloy.

[0059] The optical recording medium of Example 2 exhibited recording characteristics of 7.8% jitter, 48.5% reflectance, and 50 error rate.

[0060] After the optical recording medium of Example 2 was preserved for six days in an environment of a temperature of 60° C. and a relative humidity of 80%, the optical recording medium of Example 2 showed a jitter of 7.8%, a reflectivity of 49.0%, and an error rate of 60. That is, the optical recording medium of Example 2 exhibited excellent heat resistance and moisture r...

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Abstract

An optical recording medium includes a disc including a dye layer and a reflecting layer formed on a substrate, a dummy substrate, and an adhesive layer adhering the disc and the dummy substrate.

Description

technical field [0001] The present invention relates to an optical recording medium, such as a Digital Video Disc-Recordable (DVD-R) or a Digital Video Disc+Recordable (DVD+R) disc. Background technique [0002] figure 1 is a sectional view showing a conventional optical recording medium. DVD-R / +R discs in the "Writable Once" format will be described below as examples of optical recording media. [0003] figure 1 The DVD-R / +R disc 100 includes a disc 110 and a dummy disc 120 . The disc 110 includes a dye layer 11 , a reflective layer 12 and a passivation layer 13 sequentially stacked on a polycarbonate substrate 10 . The polycarbonate substrate 10 included pre-grooves (not shown) for guiding laser light during recording and reproducing operations, and had a thickness of 0.6 mm. The dummy disk 120 includes a reflective layer 16 , a dye layer 17 and a passivation layer 18 sequentially stacked on the dummy substrate 15 . Here, the reflective layer 16 and / or the dye layer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/26G11B7/244G11B7/253G11B7/257G11B7/258G11B7/26
CPCG11B7/2533G11B7/256G11B7/2595G11B7/246G11B7/2472G11B7/258Y10T428/2913G11B7/266G11B7/2534G11B7/2467G11B7/2585G11B7/259G11B7/2535G11B7/24G11B7/24027
Inventor 闵庚璇马明根许永宰
Owner BEALL DEVERS
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