Novel oxonol dye compound and optical information recording medium

An optical recording medium and recording medium technology, applied in the direction of optical recording carrier, recording/reproducing by optical methods, organic dyes, etc., can solve the problems of undisclosed combination of oxonol dyes and azo dyes, etc.

Inactive Publication Date: 2007-05-30
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the combined use of oxonol dyes and azo dyes is not disclosed in these patent documents

Method used

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  • Novel oxonol dye compound and optical information recording medium
  • Novel oxonol dye compound and optical information recording medium
  • Novel oxonol dye compound and optical information recording medium

Examples

Experimental program
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specific example

[0453]Specific examples are described in JP-A-58-175693, JP-A-59-81194, JP-A-60-18387, JP-A-60-19586, JP-A-60-19587, JP-A-60- 35054, JP-A-60-36190, JP-A-60-36191, JP-A-60-44554, JP-A-60-44555, JP-A-60-44389, JP-A-60-44390, JP-A-60-54892, JP-A-60-47069, JP-A-63-209995, JP-A-4-25492, JP-B-1-38680, JP-B-6-26028, German Patent 350, 399 and Nippon Kagaku-kai Shi, October, pp. 1141 (1992).

[0454] The amount of the decolorization inhibitor, for example, a single acid quencher, is usually 0.1 to 50% by mass, preferably 0.5 to 45% by mass, more preferably 3 to 40% by mass, particularly preferably 5 to 25% by mass.

[0455] [reflective layer]

[0456] On the recording layer, a reflective layer is arranged to increase the reflectivity when information is reproduced. The reflective material used as the material for the reflective layer is a material with high laser reflectivity, examples of which include metals or semi-metals such as Mg, Se, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W , Mn...

Embodiment 1

[0481] A substrate having a thickness of 0.6 mm and a diameter of 120 mm having a spiral groove (depth: 120 nm, width: 350 nm, track pitch: 0.74 μm) was formed by injection molding with polycarbonate resin. 0.95 g of dye A shown below and 0.05 g of dye B shown below were dissolved in 100 ml of 2,2,3,3-tetrafluoropropanol to prepare a coating solution, and the resulting coating solution was passed through a spinner Coating is applied on the surface of the above-mentioned substrate on the side where the grooves are formed, thereby forming a recording layer.

[0482] Dye A

[0483]

[0484] Dye B

[0485]

[0486] Thereafter, silver was sputtered on the dye-coated surface to form a reflective layer with a thickness of about 120 nm, and then the substrate was adhered to a dummy substrate of the same size as the above substrate using a UV curable resin as an adhesive on, thereby making each DVD-R disk (optical recording medium).

Embodiment 1-1

[0507] Evaluation of Spin Coating Suitability :

[0508] The dye (total amount 0.2 g) mixed in the ratio shown in Table 1 was dissolved in 10 ml of 2,2,3,3-tetrafluoropropanol, spin-coated on a polycarbonate substrate, and then checked by visual observation Coating streaks are present.

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Abstract

An optical recording medium which has a substrate and, formed thereon, a recording layer containing at least two types of dye, that is, a dye A and a dye B, characterized in that the above dye A and the above dye B satisfy the following requirements (1) and (2): (1) they have a decomposition starting temperature of 150 to 250 DEG C, (2) a refractive index n(A) and an exhaustion coefficient k(A) of the dye (A) at the wave length of a laser light for recording, and a refractive index n(B) and an exhaustion coefficient k(B) of the dye (B) at the above wave length satisfy the following formulae: n(B) / n(A) > 0.7 k(B) / k(A) > 10.

Description

technical field [0001] The present invention relates to an optical recording medium, and more particularly, to an optical recording medium having a recording layer containing a dye and capable of high-density and high-speed recording. More specifically, the present invention relates to a heat-mode information recording medium capable of writing (recording) and writing (reproducing) information with laser light of high energy density, and an information recording method. The present invention relates to a heat pattern information recording medium such as a recordable digital versatile disc (DVD-R) on which information is recorded by using visible laser light. More specifically, the present invention relates to an optical recording medium comprising an oxonol dye having a specific structure. Background technique [0002] Information recording media (optical discs) on which information can be recorded only once using laser light are hitherto known. Such an information recordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/26C09B67/22C09B69/04G11B7/24C09B23/00G11B7/2467G11B7/2478
Inventor 御子柴尚元木益司柴田路宏新居一巳田中长彦塚濑正昭
Owner FUJIFILM CORP
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