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Information medium

A medium and general formula technology, applied in the field of information media, can solve problems such as difficulty in ensuring the balance of image quality and strength, inability to ensure surface hardness, and difficulty in adding cross-linking agents

Inactive Publication Date: 2004-09-22
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the color material receiving layer of this optical recording medium, it is difficult to add a crosslinking agent, and the surface hardness formed by the crosslinking agent cannot be ensured.
That is, in this optical recording medium, it is difficult to ensure a balance between image quality and strength.

Method used

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  • Information medium
  • Information medium
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0274] "Manufacturing of disc-shaped substrates"

[0275] Polycarbonate resin (resin trade name: Panlight AD5503, Teijin Co., Ltd.) is injected into an injection molding machine equipped with a disc stamper that has a predetermined groove shape at a predetermined track pitch. , and molded at a temperature of 115°C to produce a disc-shaped resin substrate made of polycarbonate. The obtained disc-shaped resin substrate had a diameter of 120 mm and a thickness of 1.2 mm, and spiral concave grooves (pregrooves) were formed on the surface thereof. The track pitch of the concave groove was 1.6 μm, the groove width was 500 nm, and the groove depth was 180 nm.

[0276] 2.5 g of a cyanine dye represented by the following structural formula was dissolved in 100 ml of 2,2,3,3-tetrafluoropropanol to prepare a coating solution for forming a recording layer. On the surface of the disc-shaped polycarbonate substrate obtained above, on which the pregroove is provided, the coating solution i...

Embodiment 2

[0310] The information medium of Example 2 was produced in the same manner as in Example 1 except that the crosslinking agent solution A (second coating liquid) was applied by spin coating in Example 1.

Embodiment 3

[0312] By injection molding, a polycarbonate substrate (thickness: 0.6 mm, outer diameter: 120 mm, inner diameter: 15 mm, manufactured by Teijin Co., Ltd., trade name " パンライトAD5503"). The groove depth is 140nm, the groove width is 310nm, and the groove pitch is 740nm.

[0313] A recording layer was prepared by dissolving 1 g of a dye obtained by mixing the following oxonol dye (A) and oxonol dye (B) in a ratio of 65:35 in 100 ml of 2,2,3,3-tetrafluoropropanol Forming coating liquid. While changing the rotational speed from 300 rpm to 3000 rpm, the coating liquid for forming a recording layer was applied to the grooved surface of the obtained substrate by spin coating and dried to form a recording layer. When measuring the layer thickness of the recording layer, the cross section of the recording layer was observed and measured by SEM. As a result, it was 150 nm in the groove and 110 nm in the land.

[0314] [chemical formula 2]

[0315] Pigment (A)

[0316]

[0...

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Abstract

The present invention provides an information medium comprising a substrate having successively disposed thereon an undercoat layer and a colorant receiving layer, wherein the colorant receiving layer comprises at least fine particles, polyvinyl alcohol, a boron compound and a mordant, and the diffusion reflectance of the undercoat layer is 10% or more; and an information medium comprising a substrate having disposed thereon a colorant receiving layer, wherein the colorant receiving layer is formed by successively applying a first coating solution and a second coating solution which are different from each other.

Description

technical field [0001] The invention relates to an information medium having a color material receiving layer. Background technique [0002] As specifications of information media widely accepted in the market, there are CD (Compact Disc) and DVD (Digital Video Disc). [0003] As CDs, there are read-only CD-ROMs, write-once CD-Rs in which information can be recorded only once, and rewritable CD-RWs in which information can be rewritten any number of times. [0004] CD-ROM is formed by forming bit strings with a track pitch of 1.6 μm on a transparent substrate with a diameter of 120 mm and a thickness of 1.2 mm. It has a recording capacity of about 650 Mbytes, and the linear velocity is specified as 1.2-1.4 m / s. Information can be reproduced by irradiating laser light with a wavelength of 770-790nm. [0005] On the other hand, similar to CDs, DVDs include DVD-ROM, DVD-R, and DVD-RW. [0006] The recording density of DVD-ROM is about 6-8 times that of CD. In terms of struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24B41M5/00B41M5/40G11B7/245G11B7/246G11B7/247G11B7/2472G11B7/2478G11B7/249G11B7/251G11B7/253G11B7/2534G11B7/257G11B7/258G11B7/259
CPCG11B7/257G11B7/251G11B7/245G11B7/252G11B7/2478G11B7/259G11B7/2534G11B7/256G11B7/2472G11B2007/24612B41M5/00
Inventor 宇佐美由久小林孝史杉崎力大濑隆义
Owner FUJIFILM CORP