WO2005063494A1 - 光学記録媒体および色素 - Google Patents
光学記録媒体および色素 Download PDFInfo
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- WO2005063494A1 WO2005063494A1 PCT/JP2004/019387 JP2004019387W WO2005063494A1 WO 2005063494 A1 WO2005063494 A1 WO 2005063494A1 JP 2004019387 W JP2004019387 W JP 2004019387W WO 2005063494 A1 WO2005063494 A1 WO 2005063494A1
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- alkyl group
- optical recording
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B57/00—Other synthetic dyes of known constitution
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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
-
- 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
- G11B2007/24618—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 two or more dyes in two or more different layers, e.g. one dye absorbing at 405 nm in layer one and a different dye absorbing at 650 nm in layer two
Definitions
- the present invention relates to an optical recording medium and the like, and more particularly, to an optical recording medium and the like capable of supporting a blue laser.
- optical recording media such as CD-R / RW, DVD-R / RW, and MO can store large-capacity information and are easily accessed at random. It has been widely recognized and spread as an external storage device.
- an organic dye-based optical recording medium provided with a recording layer containing an organic dye compound, such as CD-R and DVD-R is low-cost and easy to manufacture. It is considered to have an advantage.
- CD-R is suitable for recording / reproducing with laser light having a wavelength of about 780 nm
- DVD-R is It is designed to be suitable for recording and reproduction using laser light with a wavelength of about 600-700 nm.
- recording and reproduction using a shorter wavelength laser beam has a low reflectance, so that recording and reproduction cannot be performed. There is a problem.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-096918
- Patent Document 2 JP 2003-127542 A
- the optical recording medium described in Patent Document 1 or Patent Document 2 uses a carbostyrilyl conjugate having an amino group at the 7-position as a dye. There is a problem that optical information is not sufficiently recorded / reproduced due to crystallization when a recording layer containing silicon is formed and immediately after that, due to this.
- the absorption maximum wavelength ( ⁇ max) is observed at about 345 to 375 nm, but almost no absorption occurs at around 405 nm, which is the long wavelength side of the absorption spectrum. Since no spectrum is observed, there is a problem that the sensitivity to blue laser light tends to be low.
- the present invention has been made to solve a problem highlighted when developing an optical recording medium on which high-density optical information is recorded and reproduced by a short-wavelength blue laser beam. .
- an object of the present invention is to provide an optical recording medium capable of recording and reproducing high-density optical information with short-wavelength laser light.
- the present invention uses a carbostilyl conjugate having a condensed ring containing an amino group and a hetero atom in a molecule as a dye. That is, the optical recording medium to which the present invention is applied has a substrate and a recording layer provided on the substrate and capable of recording or reproducing information by irradiating light, and the recording layer includes: It is characterized by containing a 7-aminocarbostiliyl conjugate represented by the following general formula [I]. [0006] [Formula 1]
- X is an oxygen atom, a sulfur atom or NR.
- R is hydrocarbon
- R is each independently a hydrogen atom or any
- R and R are each independently a hydrogen atom, carbon number 1
- n 1 to 4 and A in R represents an even number of 87 + 2n
- R and R may be different from each other. However, adjacent substitution in R—R
- the groups may form a fused ring in which the groups are bonded to each other.
- the 7-aminocarbostiliyl conjugate is a compound represented by the general formula [I], wherein R R and R are each independently a hydrogen atom or a carbon atom having 1 carbon atom.
- aralkyl base having 7 to 18 carbon atoms or a group strength.
- the 7-aminocarbostyril compound is represented by the general formula [I]:
- R are each independently a hydrogen atom, a linear or branched alkyl group having 1 to 12 carbon atoms, a cyclic alkyl group having 3 to 12 carbon atoms, or a linear or branched alkenyl group having 2 to 12 carbon atoms.
- a C7-C18 aralkyl group a C11-C12 linear or branched alkoxy group, a C11-C12 linear or branched alkylthio group, a C6-C18 aryl group, a saturated or Unsaturated heterocyclic group, halogen atom, nitro group, cyano group, mercapto group, hydroxy group, formyl group, acyl group represented by COR, amino group represented by NRR, NHCOR
- a sulfonamide group represented by a sulfonate group and NHSO R (however, R
- R 1, R 2, R 3, R 4, R 5 represent a hydrocarbon group or a heterocyclic group
- R 1, R 2 and R 3 represent a hydrogen atom, a hydrocarbon group or a heterocyclic group.
- R-R may combine with each other to form a condensed ring
- the sulfonamide group represented by 23242 be selected. Furthermore, 7—Ami
- n is preferably 2.
- the light on which information is recorded or reproduced is preferably laser light having a wavelength of 350 nm to 530 nm.
- the present invention comprises a 7-aminocarbostilyl irrigated product represented by the above general formula [I]. It is regarded as a dye characterized by the following.
- the 7-aminocarbostiliyl conjugate is represented by the formula (I), wherein X is an oxygen atom or NR.
- R is a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms, and R and R are each independently a hydrogen atom
- R is a hydrogen atom
- n is 1 to 4;
- R and R are each independently a hydrogen atom, a linear or branched alkyl having 11 to 12 carbon atoms;
- a in R represents an even number of 8 7 + 2n, and B in R is 8 7
- a and R are each
- an optical recording medium capable of recording and reproducing high-density optical information with a short-wavelength laser beam is provided.
- FIG. 2 is a measurement spectrum of an absorption wavelength of a coating film in Example 2.
- FIG. 4 is a measurement spectrum of an absorption wavelength of a coating film in Comparative Example 2.
- FIG. 5 is a measurement spectrum of an absorption wavelength of a coating film in Example 16.
- the 7-aminocarbostyril compound represented by the above general formula [I] used in the optical recording medium to which the present embodiment is applied has an appropriate absorption in a blue light region of 350 nm to 530 nm, and a blue laser. It is a dye compound suitable for recording by light.
- the substituents described as “optionally substituted.” Or “optionally substituted” or “optional substituents” Does not contain water-soluble groups such as acid groups and carboxylic acids. In addition, there must be an appropriate amount of absorption at the wavelength of the recording / reproducing light.
- the substituent may be appropriately selected from the viewpoint of the solubility and absorbability of the solvent.
- X represents an oxygen atom, a sulfur atom, or -NR in the above general formula [I].
- R, R, and R are each independently a hydrogen atom,
- an unsubstituted linear or branched alkyl group or cyclic alkyl group is particularly preferable.
- the number of carbon atoms is too large, there is a problem that the effect is not so large in terms of wavelength, and conversely, there are problems such as a decrease in absorption intensity and a problem that the product is not solidified.
- a force of about 8 is particularly preferred.
- R, R, R, and R each independently represent a hydrogen atom or an arbitrary substituent. like this
- Examples of the arbitrary substituents include, for example, those having 1 carbon atom such as a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, a tert-butyl group, and an n-heptyl group.
- a linear or branched alkaryl group having 2-18 carbon atoms such as a group
- a cyclic alkenyl group having 3-18 carbon atoms such as a cyclopentyl group or a cyclohexyl group
- Heterocyclic groups such as 2-pyridyl group, 4-piperidyl group and morpholino group
- aryl groups having 6 to 18 carbon atoms such as phenyl, tolyl, xylyl, mesityl and naphthyl
- R, R, R, and R include halo such as fluorine, chlorine, and bromine.
- a hole group a sulfier group represented by SOR; a sulfamoy represented by SONRR
- Sulfonic acid ester group represented by SO R Sulfonic acid ester group represented by SO R
- sulfone represented by NHSO R Amide groups are mentioned.
- hydrocarbon group and the heterocyclic group may be substituted as necessary.
- the hydrocarbon group represented by R -R includes a methyl group, an ethyl group, a propyl group, and an isoprene group.
- a straight-chain or branched alkyl group having 118 carbon atoms such as a pill group, n-butyl group, sec-butyl group, tert-butyl group, n-heptyl group, cyclopropyl group, cyclopentyl group,
- a linear or branched alkenyl group having 2 to 18 carbon atoms such as a cyclic alkyl group having 3 to 18 carbon atoms such as a xyl group or an adamantyl group, a butyl group, a propyl group, or a hexyl group;
- C3-C18 cyclic alkenyl, benzyl, phenethyl and other C7-20 aralkyl, phenyl and tolyl groups, such as pentyl and cyclohexyl groups Represents a C 6-18 aryl group such as, xylyl group and mesityl group.
- the heterocyclic group represented by R—R is a 4-piperidyl group, a morpholino group, or a 2-morpholino group.
- Examples of the amino group (one NR R) include substituents having the following structures.
- the carbamate group (one NHCOOR) includes a substituent having the following structure.
- the carboxylate group (one COOR) includes a substituent having the following structure.
- the acyl / reoxy group (one OCOR) includes a substituent having the following structure, [0034] [Formula 7]
- Examples of the sulfiel group include substituents having the following structures.
- the sulfamoyl group (one SONRR) includes a substituent having the following structure.
- the sulfonic acid ester group (one SO R) includes a substituent having the following structure.
- the sulfonamide group (one NHSO R) includes a substituent having the following structure.
- R, R, R, and R each have a hydrogen atom or a substituent.
- V may have a straight-chain or branched alkyl group having 1 to 12 carbon atoms, having a substituent! /, May have! / ⁇ having a cyclic alkyl group having 3 to 12 carbon atoms, having a substituent / !, may! /, A straight-chain or branched alkenyl group having 2 to 12 carbon atoms, an aralkyl group having 7 to 18 carbon atoms which may have a substituent, having a substituent A straight-chain or branched alkoxy group having 1 to 12 carbon atoms, having a substituent! /, A good!
- a straight-chain or branched alkylthio group having 1 to 12 carbon atoms, substituted Having a group, V may be an aryl group having 6 to 18 carbon atoms, having a substituent! /, May have a saturated or unsaturated heterocyclic group, a halogen atom, a nitro group, a cyano group; , Mercapto group, formyl group, hydroxy group, formyl group, acyl group represented by COR, amino group represented by NR R, NH
- Carboxylic acid ester group represented by R acyloxy group represented by OCOR, CO
- R is hydrogen atom, carbon number 1
- Bonate ester group acyloxy group represented by —OCOR, —CONR R
- substituents can enhance the solubility in coating solvents described below (especially those having an alkyl group portion) and can shift the dye max to longer wavelengths (aryl groups, unsaturated heterocycles). And an electron-withdrawing group such as a halogenated alkyl group and a cyano group).
- R—R represents a linear or branched alkyl group, a cyclic alkyl group, a linear or branched alkenyl group, a cyclic alkenyl group, a linear or branched alkoxy group.
- the kill chain portion may have additional substituents.
- substituents include an alkoxy group having 11 to 10 carbon atoms such as a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, a sec-butoxy group and a tert-butoxy group;
- An alkoxyalkoxy group having 2 to 12 carbon atoms such as a group, an ethoxymethoxy group, a propoxymethoxy group, an ethoxyethoxy group, a propoxyethoxy group, a methoxybutoxy group; a methoxymethoxymethoxy group, a methoxymethoxyethoxy group, a methoxyethoxymethoxy group; C3-C15 alkoxyalkoxyalkoxy groups such as methoxymethoxyethoxy and ethoxyethoxymethoxy groups; C6-C12 aryloxy groups such as phenoxy, toly
- adjacent substituents of R to R may be bonded to form a saturated or unsaturated condensed ring.
- a saturated hydrocarbon ring having a 5- to 7-membered ring structure is preferable.
- n represents 1-4, R is independently a hydrogen atom, a carbon atom,
- R It is a straight-chain or branched alkyl group having the number of 11 to 12.
- a in R is of 8 7 + 2n
- B in R represents an odd number of 8-7 + 2n. For example, if n is 1
- the plurality of Rs and Rs may be the same or different from each other.
- n 2, 3, 4! /, Near N (nitrogen atom) at the 7th position, from the carbon side as R, R-R Yes.
- R to R in such a condensed ring are a hydrogen atom, a linear or branched alkyl group having 11 to 12 carbon atoms.
- R-R is an alkyl group which may be substituted as described above (provided that a hydroxyl group and
- the more preferable 7-amino-rubic acid rub-down conjugate used in the optical recording medium to which the present embodiment is applied is as follows. That is, in the general formula [I], X is an oxygen atom or NR. R is a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms;
- R 3 is each independently a hydrogen atom, a linear or branched alkyl group having 18 carbon atoms, a linear or branched alkoxy group having 18 carbon atoms, a halogen atom, an aralkyl group having 7 to 12 carbon atoms. , An unsaturated heterocyclic ring, or an optionally substituted aryl group.
- R and R are hydrogen atoms, each of which is independently unsubstituted carbon atom 1
- the A in R represents an even number of 8 7 + 2n, and B in R represents 8 7 + 2n
- A, R is it
- the compound represented by the general formula [I] has a molecular weight of preferably 1000 or less, particularly preferably 600 or less. It is preferably at least 180, particularly preferably at least 200. Within this range, good recording characteristics can be expected. If the molecular weight is excessively large, the gram extinction coefficient decreases, which is not preferable.
- Preferred examples of the compound represented by the general formula [I] include the compounds (1)-(66) shown below.
- FIG. 1 is a diagram illustrating an optical recording medium to which the present embodiment is applied.
- FIG. 1A shows the first embodiment
- FIG. 1B shows the second embodiment.
- 1A includes a substrate 1 made of a light-transmitting material, a recording layer 2 provided on the substrate 1, a reflective layer 3 and a protective layer laminated on the recording layer 2. 4 are stacked in order.
- the side on which the protective layer 4 is present is referred to as the upper side, and the side on which the substrate 1 is present is referred to as the lower side.
- the bottom surface is referred to as the upper side.
- the substrate 1 various materials can be used as long as the material is basically transparent at the wavelengths of the recording light and the reproduction light.
- resins such as acrylic resin, methacrylic resin, polycarbonate resin, polyolefin resin (particularly, amorphous polyolefin), polyester resin, polystyrene resin, and epoxy resin.
- Glass Further, a structure in which a resin layer made of a radiation-curable resin such as a photocurable resin is provided on glass is exemplified.
- polycarbonate resins used in the injection molding method, and amorphous polyolefins are preferred from the viewpoints of chemical resistance and moisture absorption resistance. Further, from the viewpoint of high-speed response, glass is preferable.
- a guide groove for recording / reproducing light is formed on the upper surface. Pits may be formed. Examples of the shape of the guide groove include a concentric shape and a spiral shape based on the center of the optical recording medium 10. When a spiral guide groove is formed, the groove pitch is preferably about 0.2 to 1.2 m.
- the recording layer 2 is formed directly on the substrate 1 or on an undercoat layer or the like provided on the substrate 1 as necessary, and includes a compound represented by the general formula [1].
- Examples of the method for forming the recording layer 2 include various generally used thin film forming methods such as a vacuum evaporation method, a sputtering method, a doctor blade method, a casting method, a spin coating method, and an immersion method. From the viewpoint of mass productivity and cost, from the viewpoint of obtaining the recording layer 2 having a uniform thickness, which is preferred by the spin coating method, the vacuum deposition method or the like is more preferable than the coating method. Film formation by spin coating In this case, the rotation speed is preferably 500-15000 rpm. In some cases, after spin coating, treatment such as heating or exposure to solvent vapor may be performed.
- the compound represented by the general formula [1] is dissolved and applied to the substrate 1.
- the coating solvent used for this purpose is not particularly limited as long as it does not erode the substrate 1.
- ketone alcohol-based solvents such as diacetone alcohol and 3-hydroxy-3-methyl-2-butanone
- cellosolve-based solvents such as methyl sorb and ethyl sorb
- n-hexane and n-octane Cyclic hydrocarbon solvents such as cyclohexane, methylcyclohexane, ethylcyclohexane, dimethylcyclohexane, n-butylcyclohexane, tert-butylcyclohexane, cyclooctane, etc .
- tetrafluoropropanol Pertanolalkyl alcohol solvents such as otafanololepentanol and hexafenoleolobutanole
- hydroxycarboxylic acid ester solvents such as methyl lactate, ethyl lactate and methyl 2-hydroxyisobutyrate.
- the vacuum evaporation method for example, the compound represented by the general formula [1] and, if necessary, the recording layer components such as other dyes and various additives are placed in a vacuum container. placed in the installed crucible, the vacuum vessel 10 to a suitable vacuum pump 2 - after evacuating to about 10 5 Pa, evaporation of the recording layer components are heated the crucible, placed to face the crucible The recording layer 2 is formed by vapor deposition on the substrate.
- the recording layer 2 includes, in addition to the compound represented by the general formula [1], a transition metal chelate compound (for example, acetone) as a singlet oxygen quencher to improve stability and light resistance.
- a transition metal chelate compound for example, acetone
- a recording sensitivity improver such as a metal compound to improve recording sensitivity. May be.
- the metal-based compound refers to a compound in which a metal such as a transition metal is included in the compound in the form of an atom, an ion, a cluster, or the like.
- ethylenediamine-based complexes ethylenediamine-based complexes, azomethine-based complexes, phenylhydroxyamine-based complexes, phenantophorin-based complexes, dihydroxyazobenzene-based complexes, dioxime-based complexes, nitrosoaminophenol-based complexes, pyridyltriazine-based complexes, acetyl Organometallic compounds such as acetonate-based complexes, metallocene-based complexes, and vorphyrin-based complexes are exemplified.
- Metal atom Is not particularly limited, but is preferably a transition metal.
- a plurality of compounds represented by the general formula [1] may be used in combination, if necessary.
- a dye of another system can be used in combination as needed.
- the other type of dye is not particularly limited as long as it has an appropriate absorption mainly in the oscillation wavelength region of the recording laser light.
- the recording layer 2 differs in that a dye or the like suitable for recording and reproduction using a red laser beam having an oscillation wavelength in a wavelength band of 690 nm is contained in the recording layer 2 in combination with the compound represented by the general formula [1].
- An optical recording medium 10 that can be used for recording and reproduction using a plurality of types of laser beams belonging to a wavelength band can also be manufactured.
- Examples of the dyes other than the compound represented by the general formula [1] include metal-containing azo dyes, benzophenone dyes, phthalocyanine dyes, naphthalocyanine dyes, cyanine dyes, and dyes. Azo dyes, squarylium dyes, metal-containing indoor-phosphorus dyes, triarylmethane dyes, merocyanine dyes, azurenium dyes, naphthoquinone dyes, anthraquinone dyes, indophenol dyes, xanthene dyes, and oxazine dyes And pyridium dyes.
- a binder, a leveling agent, an antifoaming agent, and the like can be used in combination.
- Preferred binders include polyvinyl alcohol, polyvinylpyrrolidone, nitrocellulose, cellulose acetate, ketone resin, acrylic resin, polystyrene resin, urethane resin, polyvinyl butyral, polycarbonate, polyolefin and the like.
- the film thickness of the recording layer 2 is not particularly limited because a suitable film thickness varies depending on a recording method or the like, but a certain film thickness is required to enable recording. It is at least lnm or more, preferably at least 5nm. However, if it is too thick, it may not be possible to record well, and it is usually 300 nm or less, preferably 200 nm or less, more preferably 100 nm or less.
- the reflection layer 3 is formed on the recording layer 2.
- the thickness of the reflective layer 3 is preferably 50 nm to 300 nm.
- the material of the reflective layer 3 has a sufficiently high reflectance at the wavelength of the reproduction light.
- metals such as Au, Al, Ag, Cu, Ti, Cr, Ni, Pt, Ta, and Pd can be used alone or as an alloy.
- Au, Al, and Ag are suitable as the material of the reflective layer 3 having high reflectance.
- other materials may be additionally contained.
- the main component means one having a content of 50% or more.
- Materials other than the main component include, for example, Mg, Se, Hf, V, Nb, Ru, W, Mn, Re, Fe, Co, Rh, Ir, Cu, Zn, Cd, Ga, In, Si, Metals and metalloids such as Ge, Te, Pb, Po, Sn, Bi, Ta, Ti, Pt, Pd, Nd and the like can be mentioned.
- those containing Ag as a main component are particularly preferable in that they are inexpensive, easily reflect a high reflectance, and provide a white and beautiful ground color when a print receiving layer described later is provided.
- an alloy containing about 0.1 atomic% to 5 atomic% of at least one selected from Au, Pd, Pt, Cu, and Nd in Ag has high reflectance, high durability, high sensitivity and low sensitivity. Cost and preferred.
- examples thereof include an AgPdCu alloy, an AgCuAu alloy, an AgCuAuNd alloy, and an AgCuNd alloy.
- a low-refractive-index thin film and a high-refractive-index thin film are alternately stacked to form a multilayer film, which can be used as the reflective layer 3.
- Examples of a method for forming the reflective layer 3 include a sputtering method, an ion plating method, a chemical vapor deposition method, and a vacuum vapor deposition method.
- a known inorganic or organic intermediate layer or adhesive layer may be provided on the substrate 1 or under the reflective layer 3 in order to improve the reflectance, the recording characteristics, and the adhesion. You can also.
- the protective layer 4 is formed on the reflective layer 3.
- the material of the protective layer 4 is not particularly limited as long as it protects the reflective layer 3 from external force.
- Examples of the material of the organic substance include a thermoplastic resin, a thermosetting resin, an electron beam-curable resin, and a UV-curable resin.
- Examples of the inorganic substance include silicon oxide, silicon nitride, MgF, and SnO.
- the protective layer 4 can be formed by applying a coating solution prepared by dissolving in an appropriate solvent onto the reflective layer 3 and drying. it can.
- a coating solution prepared by dissolving in an appropriate solvent is applied on the reflective layer 3 and irradiated with UV light.
- UV curable resins include, for example, urethane acrylates, epoxy acrylates, polyester acrylates and other acrylates A series resin can be used. These materials may be used alone or as a mixture of two or more. Further, the protective layer may be formed as a single layer or as a multilayer.
- the method for forming the protective layer 4 as in the case of the recording layer 2, a coating method such as a spin coating method or a casting method, or a method such as a sputtering method or an evaporation method is used. Is preferred.
- the thickness of the protective layer 4 is generally 0.1 ⁇ m or more, preferably 3 ⁇ m or more, because a certain thickness is required to perform its protective function. However, if the thickness is too large, the effect is not changed and the formation of the protective layer 4 may take a long time and the cost may increase. Therefore, the thickness is usually 100 ⁇ m or less, preferably 30 ⁇ m or less.
- the layer structure of the optical recording medium 10 As described above, as the layer structure of the optical recording medium 10, a structure in which a substrate, a recording layer, a reflective layer, and a protective layer are laminated in this order has been described as an example. You can take it.
- another substrate 1 may be attached to the upper surface of the protective layer 4 in the layer structure of the above example, or to the upper surface of the reflective layer 3 with the protective layer 4 omitted from the layer structure of the above example.
- the substrate 1 may be a substrate without any layer, or may have an arbitrary layer such as the reflective layer 3 on the bonding surface or the opposite surface.
- the optical recording medium 10 having the layer structure of the above example and the optical recording medium 10 in which the protective layer 4 is omitted in the layer structure of the above example are obtained by arranging the upper surfaces of the protective layers 4 and Z or the reflective layer 3 respectively. Two sheets may be bonded to face each other.
- FIG. 1 (b) is a diagram for explaining a second embodiment of the optical recording medium. Portions common to the optical recording medium 10 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
- An optical recording medium 20 shown in FIG. 1 (b) includes a substrate 1 made of a light transmitting material, a reflective layer 3 provided on the substrate 1, a recording layer 2 laminated on the reflective layer 3, and a protective coating. 5 are stacked in order. In the optical recording medium 20, information is recorded / reproduced by laser light irradiated from the protective coating 5 side.
- the protective film 5 may be a film or sheet-like material bonded with an adhesive, or may be formed of a material similar to the above-described protective layer 4 by applying a coating liquid for film formation and curing or drying. Do It may be formed from the following.
- the thickness of the protective coating 5 is generally at least 0.1 ⁇ m, preferably at least 3 m, since a certain thickness is required to fulfill its protective function. However, if the thickness is too large, the effect is not changed and the formation of the protective coating 5 may take a long time or increase the cost. Therefore, the thickness is usually 300 ⁇ m or less, preferably 20 or less.
- each of the layers such as the recording layer 2 and the reflective layer 3 can be usually the same as the optical recording medium 10 described above.
- the substrate 1 does not need to be transparent. Therefore, opaque resin, ceramic, metal (including alloy), and the like are used in addition to the above-described materials. Even in such a layer configuration, an arbitrary layer may be provided between the above-described layers as needed as long as the characteristics of the present invention are not impaired.
- the substrate and the protective film as thin as possible.
- the structure of the optical recording medium 20 (substrate 1, reflection layer 3, recording layer 2, It is preferable to use an optical recording medium 20) having a basic layer configuration of the protective film 5. Since the protective film 5 of the optical recording medium 20 is thinner and thinner than the case where the substrate 1 of the optical recording medium 10 is thinned, the optical recording medium 20 is preferably used.
- the optical recording medium 10 having the basic layer structure of the substrate 1, the recording layer 2, the reflective layer 3, and the protective layer 4
- the recording / reproducing laser light passes therethrough.
- the thickness of the transparent substrate 1 By reducing the thickness of the transparent substrate 1 to about 50-300 m, the aberration can be reduced and it can be used.
- an ultraviolet-cured resin layer or inorganic thin film is applied to the recording / reproducing laser beam incident surface (usually, the lower surface of the substrate 1) for the purpose of protecting the surface and preventing adhesion of dust and the like.
- the recording / reproducing laser beam incident surface usually, the lower surface of the substrate 1.
- Surface that is not the recording / reproducing laser beam incident surface usually a reflective layer
- a print receiving layer On the upper surface of the protective layer 3 and the protective layer 4), there may be provided a print receiving layer which can be filled in and printed by using various printers such as ink jet and thermal transfer, or various writing tools.
- laser light having a wavelength of 350 to 530 nm is preferable.
- Typical examples of such laser light include laser light having a central wavelength power of 05 nm, 410 nm, and 515 nm.
- Laser light having a wavelength of 350 to 530 nm can be obtained by using a high-power semiconductor laser light having a wavelength of 05 nm, 410 nm or blue or 515 nm blue-green.
- a semiconductor laser beam having a fundamental oscillation wavelength of 740 to 960 nm capable of continuous oscillation and (b) a continuous oscillation having a fundamental oscillation wavelength of 740 to 960 nm excited by the semiconductor laser beam. It can also be obtained by converting the wavelength of any of the oscillation laser beams of the solid laser beam from the second harmonic generation element (SHG).
- SHG second harmonic generation element
- the SHG may be any piezo element that lacks inversion symmetry, but is preferably KDP, ADP, BNN, KN, LBO, or a compound semiconductor.
- the second harmonic include a semiconductor laser beam having a fundamental oscillation wavelength of 860 nm, which is a harmonic of the fundamental oscillation wavelength of 430 nm, and a solid-state laser beam excited by a semiconductor laser beam has a C 430nm of harmonics from r-doped LiSrAlF crystal (fundamental oscillation wavelength 860nm)
- the recording layer 2 (usually, the substrate 1 is transmitted from the substrate 1 side) Irradiate a laser beam focused to about 0.4-0.6 m.
- the portion of the recording layer 2 irradiated with the laser beam undergoes thermal deformation such as decomposition, heat generation, and dissolution by absorbing the energy of the laser beam, so that the optical characteristics change.
- the recording layer 2 When information recorded on the recording layer 2 is reproduced, the recording layer 2 is irradiated with a lower energy laser beam (usually from the same direction as the recording). In the recording layer 2, by reading the difference between the reflectance of the portion where the optical characteristic has changed (that is, the portion where the information is recorded) and the reflectance of the portion where no change has occurred, the information of the information is obtained. Playback is Done.
- reaction solution was released into 600 ml of water, 200 ml of toluene was added to extract the organic layer, and then 150 ml of toluene was recovered in the extracted aqueous layer, and the mixed toluene layer was washed twice with 400 ml of water. Then, sodium sulfate was added to the toluene layer and allowed to stand still.
- reaction solution was released into 200 ml of water, extracted with 300 ml of toluene, extracted and then added with 110 ml of toluene to the aqueous layer, and the mixed toluene solution was washed twice with 300 ml of water, and sodium sulfate was added. ⁇ ⁇ Stood still.
- the exemplified compound (51) had a ⁇ max of 379.5 nm and a molar extinction coefficient of 2.5 X 10 4 in chloroform.
- the mass spectrum (EI) of this compound was measured.
- mZz 258 (M +), which was consistent with the target compound, was observed.
- the peak was 1.0 (1H, s, NH-1), which coincided with the target compound.
- the reaction solution was mixed with 150 ml of water and 150 ml of ethyl acetate, stirred and extracted, and the aqueous layer was extracted again with 50 ml of ethyl acetate.
- the combined organic layer was washed twice with 50 ml of water, and sodium sulfate was added. Placed. After filtration, the solvent was distilled off with an evaporator, and the obtained solid was dissolved in hexane. The solid was filtered, filtered and dried in vacuo to synthesize 2.98 g (yield: 82.6%) of the following exemplified compound (52).
- the ⁇ max of this exemplified compound (52) in black hole form was 380.5 nm, and the molar extinction coefficient was 2.6 ⁇ 10 4 .
- the above exemplified compound (52) was dissolved in octafluoropentanol and adjusted to ⁇ %.
- a solution obtained by filtering the solution is dropped on an injection-molded polycarbonate resin substrate having a diameter of 120 mm and a thickness of 1.2 mm, and is applied by a spinner method (500 rpm). Dried.
- the maximum absorption wavelength ( ⁇ max) of this coating film was 384 nm.
- a film of Ag or the like is formed by a sputtering method to form a reflective layer, and then a UV curable resin is applied by spin coating or the like.
- a protective layer is formed to obtain an optical recording medium.
- recording / reproducing can be performed using a semiconductor laser beam having a center wavelength of 405 nm, for example, based on the value of ⁇ max of the coating film.
- the compound has a hetero atom at the 6-position and is condensed with the amino group at the 7-position.
- the compound has a structure effective for recording blue laser light.
- Exemplified compound (53) was obtained in the same manner as in Example 1. ⁇ max of this exemplified compound (53) in black hole form was 380.5 nm, and the molar extinction coefficient was 2.4 ⁇ 10 4 .
- the optical recording medium was prepared as follows.
- the aforementioned exemplified compound (53) was dissolved in octafluoropentanol and adjusted to 0.9 wt%.
- the solution obtained by filtration is dropped onto an injection-molded polycarbonate resin substrate with a track pitch of 425 nm, a groove width of 163 nm, a groove depth of 90 nm and a diameter of 120 mm and a thickness of 0.6 mm, and spinner method. Applied.
- the application was carried out by increasing the rotation speed from 600 rpm to 4900 rpm over 25 seconds and maintaining the rotation speed at 4900 rpm for 5 seconds. Further, it was dried at 100 ° C for 30 minutes to obtain a recording layer.
- a silver alloy was formed to a thickness of 100 nm by a sputtering method to form a reflective layer.
- a protective coating agent composed of a UV curable resin was applied by a spinner method, and irradiated with UV light to form a protective layer having a thickness of 5 m.
- a polycarbonate substrate having a thickness of 0.6 mm was adhered to the surface having the protective layer using a delay-setting adhesive to prepare an optical recording medium for evaluation.
- T is a reference clock cycle corresponding to a frequency of 66 MHz.
- the number of divided pulses is the mark length nT ( ⁇ -1), head recording pulse width 2 ⁇ , subsequent recording pulse width 0.6 ⁇ , bias power 0.2 mW, reproduction power 0.2 mW, variable recording power
- a signal with a modulation degree of 28.3% was recorded at 12 mW. It is considered that the degree of modulation is increased by optimizing the recording conditions such as the pulse strategy.
- Exemplified Compounds (54) to (66) were synthesized by the same method as the above synthesis method, and a coating film was formed in the same manner as in Example 1, and the absorption spectrum of the coating film was measured.
- the maximum absorption wavelength of these compounds in solution, the molar extinction coefficient, and the maximum absorption wavelength of the coating film were measured. Table 1 shows the results.
- a film of Ag or the like is formed by a sputtering method to form a reflective layer, and then a UV curable resin is applied by spin coating or the like.
- a protective layer is formed to obtain an optical recording medium.
- recording / reproducing can be performed using a semiconductor laser beam having a center wavelength of 405 nm, for example, based on the maximum value of the coating film.
- a carbostyrilich compound having a hetero atom at the 6-position and condensed with an amino group at the 7-position is a compound having a structure effective for recording with blue laser light.
- This compound [8] was dissolved in octafluoropentanol, and lwt. / c ⁇ adjusted.
- the solution obtained by filtration was dropped onto an injection-molded polycarbonate resin substrate with a diameter of 120 mm and a thickness of 0.6 mm, applied by a spinner method (500 rpm), and dried at 100 ° C for 30 minutes after application. did.
- the maximum absorption wavelength ( ⁇ max) of this coating film was 370.5 nm, and a good spectrum of the coating film was obtained. It can be seen that recording cannot be expected for a laser beam having a center wavelength of 405 nm, which absorbs light at a wavelength of 405 nm. The spectrum is shown in FIG. In other words, even if the carbostilyl conjugate having an amino group at the 7-position does not have a hetero atom at the 6-position, it may be an insufficient dye compound for blue laser light recording. I understand.
- Compound [9] is dissolved in octafluoropentanol, A solution obtained by filtering the solution is dropped on an injection-molded polycarbonate resin substrate having a diameter of 120 mm and a thickness of 0.6 mm, applied by a spinner method (500 rpm), and dried at 100 ° C for 30 minutes after the application. did.
- the maximum absorption wavelength ( ⁇ max) of this coating film was 354 nm, a spectrum having a low refractive index and a low reflectance was obtained, and the disk surface was slightly clouded and crystallization occurred. The spectrum is shown in FIG.
- the carbostilyl conjugate having an amino group at the 7-position does not have a hetero atom at the 6-position, it may be an insufficient dye compound for blue laser light recording. I understand.
- Exemplified compound (58) was obtained in the same manner as in Example 1.
- the ⁇ max of this exemplified compound (58) in black hole form was 384.5 nm, and the molar extinction coefficient was 2.4 ⁇ 1CT.
- the aforementioned exemplified compound (58) was dissolved in octafluoropentanol and adjusted to 0.6 wt%.
- the solution obtained by filtering this solution has a groove with a track pitch of 425 nm, a groove width of 200 nm, and a groove depth of 70 nm.
- ZnSZSiO is sputtered onto this groove with a diameter of 120 mm and a thickness of 0.6 mm.
- the recording pulse strategy is the mark length nT ( ⁇ -1), the first recording pulse width 2 ⁇ , the subsequent recording pulse width 0.6 ⁇ , bias power 0.2 mW, reproduction power 0.2 mW, recording Variable power.
- a signal having a modulation degree of 72% was recorded at 9.9 W. It is considered that the degree of modulation is increased by optimizing the recording conditions such as the pulse strategy.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Description
Claims
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EP04807743A EP1698478A1 (en) | 2003-12-26 | 2004-12-24 | Optical recording medium and dye |
US11/416,373 US20060223003A1 (en) | 2003-12-26 | 2006-05-03 | Optical recording medium and dye |
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JP2003-433328 | 2003-12-26 | ||
JP2003433328 | 2003-12-26 |
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US11/416,373 Continuation US20060223003A1 (en) | 2003-12-26 | 2006-05-03 | Optical recording medium and dye |
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WO2005063494A1 true WO2005063494A1 (ja) | 2005-07-14 |
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PCT/JP2004/019387 WO2005063494A1 (ja) | 2003-12-26 | 2004-12-24 | 光学記録媒体および色素 |
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US (1) | US20060223003A1 (ja) |
EP (1) | EP1698478A1 (ja) |
CN (1) | CN1902057A (ja) |
TW (1) | TW200531060A (ja) |
WO (1) | WO2005063494A1 (ja) |
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WO2005082637A1 (ja) * | 2004-02-26 | 2005-09-09 | Mitsubishi Chemical Corporation | 光記録材料及び光学記録媒体 |
JP2008027549A (ja) * | 2006-07-25 | 2008-02-07 | Ricoh Co Ltd | 光記録媒体の製造方法 |
JP4537430B2 (ja) * | 2007-07-31 | 2010-09-01 | 太陽誘電株式会社 | 光ディスク記録方法、光ディスク記録再生装置及び光ディスク |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001096918A (ja) * | 1999-10-01 | 2001-04-10 | Tdk Corp | 光記録媒体 |
JP2001287466A (ja) * | 2000-02-04 | 2001-10-16 | Mitsubishi Chemicals Corp | 光学記録媒体 |
JP2003508402A (ja) * | 1999-08-27 | 2003-03-04 | リガンド・ファーマシューティカルズ・インコーポレイテッド | アンドロゲン受容体モジュレーター化合物および方法 |
JP2003096330A (ja) * | 2001-09-25 | 2003-04-03 | Fuji Photo Film Co Ltd | 顔料分散剤、これを含む顔料分散組成物及び着色感光性組成物 |
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US4891352A (en) * | 1988-12-23 | 1990-01-02 | Eastman Kodak Company | Thermally-transferable fluorescent 7-aminocarbostyrils |
WO2005082637A1 (ja) * | 2004-02-26 | 2005-09-09 | Mitsubishi Chemical Corporation | 光記録材料及び光学記録媒体 |
KR100766764B1 (ko) * | 2004-07-16 | 2007-10-17 | 미츠비시 가가쿠 메디아 가부시키가이샤 | 광기록 매체 및 광기록 매체의 광기록 방법 |
-
2004
- 2004-12-24 EP EP04807743A patent/EP1698478A1/en not_active Withdrawn
- 2004-12-24 WO PCT/JP2004/019387 patent/WO2005063494A1/ja not_active Application Discontinuation
- 2004-12-24 CN CN200480039147.6A patent/CN1902057A/zh active Pending
- 2004-12-27 TW TW093140824A patent/TW200531060A/zh unknown
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2006
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2003508402A (ja) * | 1999-08-27 | 2003-03-04 | リガンド・ファーマシューティカルズ・インコーポレイテッド | アンドロゲン受容体モジュレーター化合物および方法 |
JP2001096918A (ja) * | 1999-10-01 | 2001-04-10 | Tdk Corp | 光記録媒体 |
JP2001287466A (ja) * | 2000-02-04 | 2001-10-16 | Mitsubishi Chemicals Corp | 光学記録媒体 |
JP2003096330A (ja) * | 2001-09-25 | 2003-04-03 | Fuji Photo Film Co Ltd | 顔料分散剤、これを含む顔料分散組成物及び着色感光性組成物 |
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US20060223003A1 (en) | 2006-10-05 |
TW200531060A (en) | 2005-09-16 |
EP1698478A1 (en) | 2006-09-06 |
CN1902057A (zh) | 2007-01-24 |
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