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Composition for holographic recording medium, holographic recording medium, and method for producing the same

A technology of holographic recording medium and composition, which is applied in the directions of recording information storage, recording/reproducing by optical method, data recording, etc., can solve the problem of not proposing the implementation of holographic optical recording medium, etc., and achieve the effect of high-density recording

Inactive Publication Date: 2008-03-26
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, there is no proposed embodiment of using these resins for holographic optical recording media

Method used

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  • Composition for holographic recording medium, holographic recording medium, and method for producing the same
  • Composition for holographic recording medium, holographic recording medium, and method for producing the same
  • Composition for holographic recording medium, holographic recording medium, and method for producing the same

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specific example

[0228] In order to adjust the conditions of irradiation with ultraviolet rays, an ultraviolet absorber may be added to the cholesteric liquid crystal layer. The ultraviolet absorber is not particularly limited, and may be appropriately selected according to the intended application. Preferred examples thereof include benzophenone ultraviolet absorbers, benzotriazole ultraviolet absorbers, salicylic acid ultraviolet absorbers, cyanoacrylate ultraviolet absorbers, and oxalanilide ultraviolet absorbers. Specific examples of these ultraviolet absorbers are described in, for example, the following patent documents: Japanese Patent Application Laid-Open (JP-A) 47-10537, JP-A 58-111942, JP-A 58-212844, JP-A 59-19945, JP-A -A 59-46646, JP-A 59-109055, JP-A 63-53544, Japanese Patent Application Publication (JP-B) 36-10466, 42-26187, 48-30492, 48-31255, 48-41572, 48 - 54965, 50-10726, US Patent 2,719,086, US Patent 3,707,375, US Patent 3,754,919 and US Patent 4,220,711.

[0229] The t...

no. 1 approach

[0241] 6 is a schematic cross-sectional view of the structure of the hologram recording medium according to the first embodiment of the present invention. In the hologram recording medium 21 according to the first embodiment of the present invention, the servo pit pattern 3 is formed on the polycarbonate resin substrate or the glass substrate 1, and the servo pits are coated by using aluminum, gold, platinum, or the like Pattern surface, reflective surface 2 is formed on the servo pit pattern. In FIG. 6 , a servo pit pattern is formed on the entire surface of the second substrate 1 . The servo pit pattern 3 may be periodically formed as shown in FIG. 1 . The height of the servo pit pattern 3 is typically 1750 Ȧ (175 nm), and is significantly thinner than the thickness of other layers including the second substrate 1 .

[0242] The first gap layer 8 is formed by applying a material such as a UV-curable resin onto the reflective surface 2 formed on the second substrate 1 by sp...

no. 2 approach

[0252] 7 is a schematic cross-sectional view of the structure of a hologram recording medium according to a second embodiment of the present invention. In the hologram recording medium 22 according to the second embodiment of the present invention, the servo pit pattern 3 is formed on the polycarbonate resin or glass substrate 1, and the servo pit pattern surface is coated by using aluminum, gold, platinum, or the like A reflective surface 2 is formed. The height of the servo pit pattern 3 is the same as in the case of the first embodiment in which the height of the servo pit pattern is typically 1750 Ȧ (175 nm).

[0253] The difference in structure between the second embodiment and the first embodiment is that the hologram recording medium 22 according to the second embodiment has the second gap layer 7 formed between the wavelength selective reflection layer 6 and the hologram recording layer 4 .

[0254] After the first gap layer 8 is formed, the wavelength selective refle...

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Abstract

The present invention aims to provide a composition for holographic recording media which allows the preparation of filled with Disc-like media of photopolymers. The composition for a holographic recording medium includes a binder, a polymerizable polymer, and a photopolymerization initiator, wherein the binder is a polymer capable of forming a three-dimensional crosslinked structure through a non-polymerization reaction. A preferred aspect is that the polymer capable of forming a three-dimensional crosslinked structure through a non-polymerization reaction is (A) a polymer having an ionic group and forming a salt with a counter ion of the ionic group and (B) having a crystal structure at least one of the polymers.

Description

technical field [0001] The present invention relates to a composition for holographic recording media which allows the preparation of photopolymer-filled and also relates to a holographic recording medium using the composition for a holographic recording medium and a method for producing the holographic recording medium. Background technique [0002] As one of recording media capable of writing large-capacity information such as high-density image data, an optical recording medium is exemplified. For these optical recording media, although magneto-optical discs, rewritable optical recording media such as phase-change optical discs, and recordable optical recording media such as CD-R have been put into practical use, but for storing larger-capacity data in optical recording media demand is increasing. However, all conventionally proposed optical recording media use a two-dimensional recording system and have limitations in increasing recording density. Recently, holographi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/02G03H1/00G11B7/242G11B7/24044G11B7/24062G11B7/24073
CPCG03F7/033G11B7/252G11B7/245G11B7/258G11B7/24044G11B7/2585G03F7/001
Inventor 松本浩隆加茂诚
Owner FUJIFILM CORP
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