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Evaluating method for optical recording media adaptability of colourant components, optical recording materials and optical recording media

A technology for optical recording media and adaptability evaluation, which is applied in the direction of record carrier materials, optical record carriers, optical record carrier manufacturing, etc., and can solve problems such as increased error rate and increased jitter

Inactive Publication Date: 2005-11-02
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, it is speculated that in high-speed information recording with a linear velocity of 14 m / s or higher at a speed of 4 times or more, such thermal interference between pits causes an increase in jitter or an increase in the error rate.

Method used

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  • Evaluating method for optical recording media adaptability of colourant components, optical recording materials and optical recording media
  • Evaluating method for optical recording media adaptability of colourant components, optical recording materials and optical recording media
  • Evaluating method for optical recording media adaptability of colourant components, optical recording materials and optical recording media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] First, a polycarbonate resin substrate having a diameter of 120 mm and a thickness of 0.6 mm having pregrooves (0.12 μm in depth, 0.30 μm in width, and 0.74 μm in groove pitch) on one side was prepared. On the other hand, a dye component composed of the same constituent material as the dye component No. 1 was added to 2,2,3,3-tetrafluoropropanol so that the content thereof was 1.0% by mass to prepare a coating for a recording layer. cloth liquid. The obtained coating solution was coated on the surface of the polycarbonate resin substrate on which the pregroove was formed, and dried at 80° C. for 1 hour to form a recording layer (thickness: 150 nm). Next, an Ag reflective layer (100 nm in thickness) was formed on the recording layer by sputtering, and an ultraviolet curable resin SD-1700 (manufactured by Dainippon Ink Chemical Industry Co., Ltd., trade name ) and then irradiated with ultraviolet rays to form a transparent protective layer (thickness: 8 μm) made of acryl...

Embodiment 2～5、 comparative example 1～3

[0161] As the coloring component, it is the same as in Example 1, except that instead of the coloring component made of the same constituent material as sample No. , The optical recording media (optical recording discs) of Examples 2-5 and Comparative Examples 1-3 were obtained.

[0162] (Evaluation of recording-reproducing characteristics)

[0163] The optical recording media of Examples 1 to 5 and Comparative Examples 1 to 3 were irradiated with laser light having a wavelength of 650 nm using a disc evaluation device (trade name: DDU-1000) manufactured by Palstec Industries, Ltd., and recorded signals at a linear velocity of 28 m / sec. In addition, the lens hole diameter NA of the optical head included in the above device was 0.60. Note that recording was performed at such a recording power that an eye pattern in which the center of the eye was located at the center of the 14T waveform was obtained (see Table 15). After recording, PI (Inner-code-Parity) errors (number of er...

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Abstract

The method of evaluating dye component suitability for optical recording media according to the invention comprises a first step in which the temperature of a sample containing the dye component or the temperature of the atmosphere surrounding the sample is set to two or more different prescribed temperatures, and the absorbance of the sample for light of a prescribed wavelength is measured at each of the prescribed temperatures, and a second step in which the suitability of including the dye component in the recording layer of an optical recording medium is evaluated based on one or more conditions which are set based on correlation between the prescribed temperatures and the absorbance.

Description

technical field [0001] The present invention relates to an optical recording medium for recording information by light irradiation, an optical recording material used in the optical recording medium, and a method for evaluating optical recording medium suitability of pigment components contained therein. Background technique [0002] In an optical recording medium, light such as a laser beam is generally irradiated to a recording layer, and information is recorded by utilizing shape change, magnetic domain change, phase change, etc. of the recording layer. Such optical recording media include, for example, write-once optical recording media having a recording layer containing an organic dye such as an azo compound, and are widely used as CD-R (compact disc-on-record) and DVD±R (DVD-on-record). [0003] The CD-R among the above-mentioned write-once optical recording media is usually composed of a recording layer mainly composed of a pigment, a reflective layer mainly composed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/26G11B7/00G11B7/24035G11B7/244G11B7/246G11B7/2495G11B7/26
CPCG11B7/2463G11B7/2478G11B7/2534G11B7/2475G11B7/2533G11B7/2472G11B7/2492G11B7/246G11B7/2495G11B7/259G11B7/2531G11B7/2536G11B7/2467G11B2007/24612
Inventor 门田敦志新海正博田辺顺志
Owner TDK CORPARATION
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