EP1131202A1 - Support d'enregistrement organique pour disques flurorescents du type worm - Google Patents

Support d'enregistrement organique pour disques flurorescents du type worm

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Publication number
EP1131202A1
EP1131202A1 EP99969062A EP99969062A EP1131202A1 EP 1131202 A1 EP1131202 A1 EP 1131202A1 EP 99969062 A EP99969062 A EP 99969062A EP 99969062 A EP99969062 A EP 99969062A EP 1131202 A1 EP1131202 A1 EP 1131202A1
Authority
EP
European Patent Office
Prior art keywords
recording medium
data recording
optical data
fluorescent
group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP99969062A
Other languages
German (de)
English (en)
Other versions
EP1131202A4 (fr
Inventor
Mark Alperovich
Irene Zuhl
Eugene Levich
Arkady Khaikin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TriD Store IP LLC
Original Assignee
TriD Store IP LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TriD Store IP LLC filed Critical TriD Store IP LLC
Publication of EP1131202A1 publication Critical patent/EP1131202A1/fr
Publication of EP1131202A4 publication Critical patent/EP1131202A4/fr
Pending legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/245—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing a polymeric component
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
    • G11B7/247—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes methine or polymethine dyes
    • G11B7/2472—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes methine or polymethine dyes cyanine
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
    • G11B7/248—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes porphines; azaporphines, e.g. phthalocyanines
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B7/266—Sputtering or spin-coating layers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
    • G11B2007/24624—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes fluorescent dyes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
    • G11B7/2534—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins polycarbonates [PC]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/256—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers improving adhesion between layers

Definitions

  • This invention is related to the field of media for WORM optical discs with fluorescent reading, providing high capacity optical memory, including 3-dimensional optical memory systems.
  • All WORM optical media of practical interest is based on a photo thermal principle of recording [ 1 ] .
  • the data on such media is recorded by scanning the recording layer with the focused laser beam.
  • the laser power is absorbed by the active medium of the layer and transformed into thermal energy, causing its physical and chemical changes, which can be optically registered at reading.
  • Photochemical effects can also be used, i.e., optically detected changes in the state of medium, caused by direct interaction of photons with this medium.
  • the efforts are made to use photosensitive medium for photochemical recording on WORM discs. Hence, until now there was no practical application for WORM discs with a photon mechanism of recording.
  • the photo thermal recording on WORM optical medium with practical applications can be divided in two parts: ablative, providing optically registered geometric changes in the thin active layer during its melting, evaporation or chemical transformations, and with phase change, which does not provide geometric changing of the active layer, otherwise changing its optical constants, that causes optical contrast, which is usually not high for these materials.
  • WORM optical discs with thin (10-100 nm) layers of organic dyes with or without dye-in-polymer are of special interest.
  • Layers of organic dyes provide a range of sufficient advantages in comparison to metal or half-metal layers, used in WORM discs with ablative recording.
  • Such advantages are the following: dyes may have a stronger selective absorption on the recording laser wavelength; dye layers are more sensitive to the laser radiation because of their small thermal conductivity and low temperature of melting or decomposition. That provides a higher recording capacity; dye layers provide a higher stability at higher humidity.
  • Medium based on layers has better signal-to-noise ratios, because of the lack of noise, provided by amorphous layers. The procedure of coating the layers in the centrifuge makes this method more simple and cheap than vacuum deposition used for obtaining metal and half-metal layers on WORM discs.
  • the existing WORM optical discs based on organic dyes have a capacity up to 3.5 GB.
  • said optical memory capacity is the utmost or, at least for the diode laser with 780-830 nm wavelengths.
  • Future increasing the capacity for WORM discs is possible with the use of three-dimensional optical memory carriers with multilayer data recording and fluorescent reading [2,3].
  • Fluorescent reading offers a range of sufficient advantages in comparison to reading, based on the changes in the reflection ratio, even in the single-layer systems.
  • One of the advantages is the reduced tolerance for the sizes of recorded pits in comparison to the existing WORM discs.
  • the local heating of the medium at recording can reach 700°C.
  • Such high temperature makes it difficult to avoid changing the geometrical structure of the layer.
  • Increasing the thickness of the dye layer up to 200 nm and more by using polymer dye at preserving the surface concentration of dye leads to lowering the local heating temperature and allows to prevent the layer deformation. It also provides the appearance and growth of the dye fluorescence due to lowering the concentration suppression effect.
  • the layer sensitivity to laser radiation is dramatically lowering, that leads to drop of recording speed and density.
  • the purpose of this invention is to obtain a high- sensitive dye-in-polymer (DIP) medium for fluorescent WORM discs, providing high rates and density of photo thermal recording.
  • the other purpose of the present invention is to provide a DIP medium with high sensitivity to the recording laser radiation in visual and infrared ranges.
  • the DIP medium is comprised of a fluorescent dye, capable to absorb the recording laser radiation and transform the absorbed light power into the heat, and nitrocellulose, capable to generate decomposition products under heating.
  • the above- stated DIP media contains a fluorescent dye, which generates non fluorescent dimers with sandwich structure, capable to absorb the recording laser radiation and transform it into heat, and nitrocellulose, capable to generate decomposition products under heating.
  • the above-mentioned nitrocellulose decomposition' products cause the distinguishing of fluorescence or discoloring of the fluorescent dye, thus making the recording. If the recording laser radiation is absorbed by the monomer form of fluorescent dye, the same laser can be used for reading and recording (i.e., 650 nm, but with different power pulse). If the recording laser radiation is absorbed by the dimer form of fluorescent dye, the recording laser has a shorter wavelength (i.e., 635 nm).
  • the substrate is made in a form of a transparent disc from a glass, polymethyl methacrylate, polycarbonate or polyethylene terephthalate and is covered with a recording layer, consisting of at least a fluorescent dye, capable to absorb the recording laser radiation and transform it into the heat, nitrocellulose, capable to generate decomposition products under heating, which discolor the dye or extinguish its fluorescence, and a film- forming polymer with high transparency, low heat conductivity and capable to provide the necessary quantum output of the dye fluorescence.
  • the recording layer can contain compounds, impeding nitrocellulose decomposition, improving the dye stability at disc storage and reading, plastifier, etc.
  • the thickness of the recording layer can be 100- 1000 nm, preferably - 200-500 nm.
  • Fluorescent dye with maximum absorption value near the recording laser wavelength is selected from the components related to the xanthene dyes of the eosine and rhodamine groups, acridine, oxazine, azine, perylene, violanthrole, cyanine, phthalocyanine dyes, indigo colors and porphyries.
  • the content of the fluorescent dye in the layer is equal to 0J - 10%.
  • the offered in the present invention optical recording composition contains nitrocellulose with 10.7 up to 12.5% nitrogen and polymerization rate (number of fherificated glucose residues in anitrocellulose macromolecule) within 150-300, the so-called lacquer collodion cotton.
  • the lacquer collodion cotton decomposes spontaneously, at that the decomposition rate grows quickly at raising temperatures.
  • the lacquer collodion cotton decomposition is a self-accelerating process. The self-acceleration is especially significant in the presence of oxygen and traces of humidity [4] .
  • the film-forming polymer is selected from a wide range of resins, such as: cellulose esters, i.e., nitrocellulose, cellulose acetate, cellulose acetate butyrate; cellulose ethers, i.e., methyl cellulose, ethyl cellulose, butyl cellulose; vinyl resins, i.e., polyvinyl acetate, polyvinyl butyral, polyvinyl acetyl, polyvinyl alcohol and polyvinyl pyrrolidone; acrylic resins, i.e., polymethyl methacrylate, a polybutyl acrylate, a poly methacrylic acid, polyacrylilc amid polyacrylonitrile.
  • resins such as: cellulose esters, i.e., nitrocellulose, cellulose acetate, cellulose acetate butyrate; cellulose ethers, i.e., methyl cellulose, ethyl cellulose, butyl cellulose; vinyl resins,
  • alkyd, urea-formaldehyde and melamine- formaldehyde resins simple polyvinyl ethers and poly acrylic resins.
  • Aliphatic, aromatic and heterocyclic amines, urea derivatives, or sulfur compounds can serve for nitrocellulose decomposition impeding.
  • Film- forming properties of the used resins and the plasticity of the recording layer can be improved by adding to resins the proper plastifier, such as dibutyl phthalate, dioctyl phthalate or tricresyl phosphate.
  • the above-mentioned ingredients are dissolved in organic solvent or introduced in it as micro capsules less than 0,2 mkm in size, prepared by known methods, with future covering the substrate with this compound by spin coating, roller coating or dip coating.
  • the organic solvent is usually selected from alcohols, ketone, amide, sulfoxides, ethers, esters, halogenated aliphatic hydrocarbons or aromatic solvents.
  • solvents examples include methanol, ethanol, iso-propanol, iso-butanol, tetrafluoro-ethanol, diacetone alcohol, methyl cellosolve, ethyl cellosolve, acetone, methylethylketone, cyclohexanone, N, N- dimethhylformamide, N, N-dimethylacetamide, dimethylsulfoxide, tetrahydrofurane, dioxane, ethyl acetate, chloroform, methylene chloride, dichloroethane, toluene, xylene or their mixtures.
  • the fluorescent dye of the optical recording media forms non fluorescent dimers of sandwich structure with the maximum absorption value close to the recording laser wavelength.
  • the non fluorescent dimers absorb the laser radiation and transform it into heat, which cause determination of nitrocellulose. Its determination products lead to fluorescence distinguishing or decoloration of the dye monomer form.
  • the advantage of this variant is that non fluorescent dimers practically fully transfer the absorbed light power into heat.
  • the fluorescent monomer form is realizing it only partly.
  • the lasers with a different wavelength are used for reading and recording.
  • the single recording layer of the optical recording media is obtained either by direct disposing it on the substrate or, by providing an internal layer between the substrate and the recording layer.
  • an adhesive property and mechanical durability are obtained along with a lower heat loss due to the heat distribution in the substrate.
  • the use of an intermediate layer allows use of solvents, aggressive to the substrate.
  • the recording layer can be covered with a protective layer or with another glued substrate to protect it from outer impacts, thus improving its stability.
  • a multilayer disc for three-dimensional optical memory with fluorescent reading is obtained by consecutive bonding of the above single-layer discs one to another so that the active recording layers alternate the inactive separating layers of the substrate.
  • the glue used for obtaining a multilayer optical disc will provide good adhesion of the bonded surfaces and no contraction, which do not worsen the characteristics of recording layers and signal-to-noise ratios, which are transparent for the laser wavelength and fluorescent light.
  • Examples of such glue include UV -hardened optical glue of 3-92, UN-71, UV-69, UV-74, J-91, VTC-2, SK-9 types ("Catalog of Summers laboratories").
  • the multilayer's disc recording is provided by a consecutive scanning of every recording layer by a focused laser beam. The same way the reading of the recorded information is made.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,013% oxazine 725 perchlorate (Exciton, Inc.) and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 500 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,039% oxazine 725 perchlorate (Exciton, Inc.) and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1 % nitrocellulose, 0,078% oxazine 725 perchlorate (Exciton, Inc.) and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 200 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,013% HIDC (Exciton, Inc.) and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 500 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,039% HIDC (Exciton, Inc.) and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,078% HIDC (Exciton, Inc.) and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300 nm thickness.
  • Example 7
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,013% 3,3,3'3' tetra methyl 1,1'- diphenylindodicarbocyanine Perchlorate and dioctyl phthalate 0.2%o.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 500 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,039% 3,3,3'3' tetra methyl 1,1'- diphenylindodicarbocyanine Perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 400 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,078% 3,3,3'3' tetra methyl- 1,1'- diphenylindodicarbocyanine Perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 400 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,013% 3,3,3'3' tetra methyl-1, l'-dibutyl- 4,4,4' ,5 ' -dibenzoindo-dicarbocyanine Perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 500 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1 : 1) containing: 1% nitrocellulose, 0,039% 3,3,3'3' tetramethyl-lJ'-dibutyl-4,4,4',5'- dibenzoindo-dicarbocyanine perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,078% 3,3,3 '3' tetra methyl- lJ'-dibutyl- 4,4,4' ,5 ' -dibenzoindo-dicarbocyanine perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 200 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,013% triethylammonium salt of 1,1-di- ⁇ - sulfopropyl-3,3,3'3' tetramethylindodicarbocyanine and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 500 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,039% triethylammonium salt of 1,1-di- ⁇ - sulfopropyl-3,3,3'3' tetramethylindodicarbocyanine and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was containing: 1 % nitrocellulose, 0,078% triethylammonium salt of 1 , ⁇ -di- ⁇ -sulfopropyl- 3,3,3 '3 ' tetramethylindodicarbocyanine and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,013% 3,3,3'3'tetramethyl-lJ'- diphenylindotricarbocyanine Perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,039% 3,3,3'3'tetramethyl-lJ '- diphenylindotricarbocyanine Perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,078% 3,3,3'3'tetramethyl-lJ '- diphenylindotricarbocyanine Perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 200 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1 :1) was prepared containing: 1% nitrocellulose, 0,013% HITC (Exciton, Inc.) and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 400 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,039% HITC (Exciton, Inc.) and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,078% HITC (Exciton, Inc.) and dioctyl phthalate 0.2%o.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 300nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,013% 3,3,3'3'tetramethyl-lJ ' -diphenyl- 10,12- dimethylene-11-diphenylaminoindotricarbocyanine Perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 400 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% polyvinyl acetate, 0,039% 3,3,3'3'tetramethyl-lJ'-diphenyl- 10, 12-dimethylene- 11 -diphenylaminoindotricarbocyanine Perchlorate and dioctyl phthalate
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 500 nm thickness.
  • the ethanol and ethyl cellosolve mixture solution (1:1) was prepared containing: 1% nitrocellulose, 0,078% 3,3,3 '3'tetramethyl-l, 1 ' -diphenyl- 10,12- dimethylene-11-diphenylaminoindotricarbocyanine Perchlorate and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 500 nm thickness.
  • the ethyl cellosolve solution (1 :1) was prepared containing: 0.5% ⁇ olyvinyl acetate and 0.5% nitrocellulose, 0,039%> 3,3,3'3'tetramethyl-lJ '- diphenylindotricarbocyanine Perchlorate and dioctyl phthalate 0.2%>.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 500nm thickness.
  • the ethyl cellosolve solution (1:1) was prepared containing: 0.5% polyvinyl acetate and 0.5% nitrocellulose, 0,039% HIDC (Exciton, Inc.) and dioctyl phthalate 0.2%.
  • the compound solvent was filtered, deposited on a polycarbonate disc and dried to form a recording layer with 500 nm thickness.
  • Every optical disc obtained according to examples 1-26 was placed on the rotating table and radiated by focused laser pulses of 1 ns duration, received from a semiconductor laser with 635, 650 or 830 nm wavelength, 10 mW power. For comparison, we took a standard CD-R disc by TDK with ablative recording and reflective reading.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

L'invention concerne une composition polymère à colorant destinée à être utilisée pour les disques du type WORM, renfermant environ entre 0,1 et 10 %, en poids, de colorant fluorescent capable d'absorber le rayonnement laser et de convertir en chaleur la lumière absorbée; environ entre 10 et 80 %, en poids, de nitrocellulose et de polymère feuillogène. La solution renfermant le colorant est appliquée à un substrat de support de lecture optique via revêtement par centrifugation, application au rouleau ou enrobage par trempage. Le procédé consiste à utiliser un faisceau laser focalisé pour explorer la couche d'enregistrement.
EP99969062A 1998-09-17 1999-09-17 Support d'enregistrement organique pour disques flurorescents du type worm Pending EP1131202A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10072698P 1998-09-17 1998-09-17
US100726P 1998-09-17
PCT/US1999/021288 WO2000015425A1 (fr) 1998-09-17 1999-09-17 Support d'enregistrement organique pour disques flurorescents du type worm

Publications (2)

Publication Number Publication Date
EP1131202A1 true EP1131202A1 (fr) 2001-09-12
EP1131202A4 EP1131202A4 (fr) 2002-02-06

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EP99969062A Pending EP1131202A4 (fr) 1998-09-17 1999-09-17 Support d'enregistrement organique pour disques flurorescents du type worm

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EP (1) EP1131202A4 (fr)
JP (1) JP2002524324A (fr)
AU (1) AU1440200A (fr)
WO (1) WO2000015425A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9275671B2 (en) 2011-06-09 2016-03-01 Case Western Reserve University Optical information storage medium

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001093258A2 (fr) * 2000-06-02 2001-12-06 Trid Store Ip Llc Support optique enregistrable multicouche a lecture par fluorescence
JP2007507818A (ja) * 2003-09-30 2007-03-29 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 高コントラストの光学式情報担体
KR100837577B1 (ko) 2006-12-29 2008-06-12 재단법인서울대학교산학협력재단 반복 기록 및 삭제가 가능한 형광 메모리용 필름, 및 그필름을 이용한 비-손실 기록 판독 및 재생 방법
RU2478116C2 (ru) * 2011-03-17 2013-03-27 Государственное образовательное учреждение высшего профессионального образования "Российский химико-технологический университет им. Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) Светочувствительный полимерный материал с флуоресцентным считыванием информации
US11211091B2 (en) 2011-06-09 2021-12-28 Case Western Reserve University Optical information storage medium

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GB2036597A (en) * 1978-09-29 1980-07-02 Fuji Photo Film Co Ltd Thermal recording materials
EP0488451A1 (fr) * 1990-11-28 1992-06-03 Koninklijke Philips Electronics N.V. Disque mère
EP0503428A1 (fr) * 1991-03-14 1992-09-16 Matsushita Electric Industrial Co., Ltd. Support d'enregistrement optique et méthode l'utilisant
WO1999059142A2 (fr) * 1998-05-13 1999-11-18 Omd Devices Llc Milieu colorant-dans-polymere (dip) organique pour disques optiques inscriptibles une seule fois (worm) et a lecture fluorescente

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CA2110233C (fr) * 1992-12-02 1999-01-12 Mitsui Toatsu Chemicals, Incorporated Support d'enregistrement optique d'informations et compose pour film d'enregistrement optique d'informations
US5633106A (en) * 1994-04-08 1997-05-27 Mitsui Toatsu Chemicals, Inc. Optical recording media and a method of recording and reproducing information
US5658707A (en) * 1994-10-18 1997-08-19 Mitsui Toatsu Chemicals, Inc. Optical recording media
US5855979A (en) * 1996-08-08 1999-01-05 Mitsui Chemicals, Inc. Optical recording medium

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Publication number Priority date Publication date Assignee Title
GB2036597A (en) * 1978-09-29 1980-07-02 Fuji Photo Film Co Ltd Thermal recording materials
EP0488451A1 (fr) * 1990-11-28 1992-06-03 Koninklijke Philips Electronics N.V. Disque mère
EP0503428A1 (fr) * 1991-03-14 1992-09-16 Matsushita Electric Industrial Co., Ltd. Support d'enregistrement optique et méthode l'utilisant
WO1999059142A2 (fr) * 1998-05-13 1999-11-18 Omd Devices Llc Milieu colorant-dans-polymere (dip) organique pour disques optiques inscriptibles une seule fois (worm) et a lecture fluorescente

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Title
See also references of WO0015425A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9275671B2 (en) 2011-06-09 2016-03-01 Case Western Reserve University Optical information storage medium

Also Published As

Publication number Publication date
JP2002524324A (ja) 2002-08-06
AU1440200A (en) 2000-04-03
EP1131202A4 (fr) 2002-02-06
WO2000015425A1 (fr) 2000-03-23

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