WO2004005371A1 - 光学記録媒体 - Google Patents
光学記録媒体 Download PDFInfo
- Publication number
- WO2004005371A1 WO2004005371A1 PCT/JP2002/006952 JP0206952W WO2004005371A1 WO 2004005371 A1 WO2004005371 A1 WO 2004005371A1 JP 0206952 W JP0206952 W JP 0206952W WO 2004005371 A1 WO2004005371 A1 WO 2004005371A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- recording medium
- substrate
- optical recording
- thermoplastic resin
- medium according
- Prior art date
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Classifications
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- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/04—Aromatic polycarbonates
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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
- G11B7/252—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
- G11B7/258—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 reflective layers
- G11B7/2585—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 reflective layers based on aluminium
-
- 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
- G11B7/258—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 reflective layers
- G11B7/2595—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 reflective layers based on gold
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
Definitions
- the present invention relates to an optical information recording medium, and more particularly, to an optical information recording medium for surface recording / reproduction.
- embossed pits corresponding to recorded data are formed on one surface of a 1.2 mm thick transparent substrate.
- a reflective film made of aluminum (A1) or the like is formed thereon. The information recorded on such a CD disk is reproduced by irradiating a focused beam from the transparent substrate side opposite to the surface provided with the reflective film.
- DVDs and DVD-ROM discs with higher recording density (these are abbreviated as "DVD discs") have a 0.6 mm thick transparent substrate on one side. Finer emboss pits are formed than in the case of a CD disk, and a reflective film made of A1 or the like is formed thereon. Reproduction of information recorded on the recording surface of such a DVD disc is performed by irradiating a condensed beam from the transparent substrate side opposite to the surface on which the reflective film is formed, as in the case of a CD disc. .
- a transparent resin material As a material for a 0.6 mm thick substrate, a transparent resin material, PC (polycarbonate) is generally used.
- PC polycarbonate
- the mechanical characteristics of a 0.6 mm thick PC board are not sufficient, and the board warps as it is.Therefore, two 0.6 mm PC boards are bonded together so that the recording surface is on the inside. The mechanical properties are secured as a 1.2 mm thick disk.
- the thickness of the DVD disc substrate is 0.6 mm is that the tilt margin It is to secure. If the track pitch and pit density become tighter, the tilt of the disk will decrease, so-called tilt margin will decrease. By reducing the substrate thickness from 1.2 mm to 0.6 mm, a tilt margin can be secured, but ⁇ a reduction in mechanical strength is inevitable.
- the following summarizes the conditions required for an optical recording medium to achieve a high storage density of 8 GB.
- the recording / reproducing optical system meets ⁇ 0.68 im and ⁇ . A./ ⁇ 1.20
- the thickness t of the transparent protective layer in the recording area is 3 to 177 xm.
- US Pat. No. 6,159,572 Japanese Patent Application Laid-Open No. 11-296904 discloses a single-sided recording method, which describes “a substrate having a recording surface provided with embossed pits or guide grooves; A reflective film formed on the reflective film, a protective film formed on the reflective film, a first surface on which the protective film is formed, and a first surface facing the first surface.
- An information recording medium comprising a first surface and a second surface, the first surface being irradiated with a light beam, and reproducing the recorded information based on a change in the light intensity of the reflected light.
- an information recording medium characterized in that the distance from the recording surface of the substrate to the first surface is smaller than the thickness of the substrate, and the first surface is smooth.
- a substrate having embossed pits or guide grooves, and having opposing first and second recording surfaces, and first and second recording surfaces formed on the first and second recording surfaces of the substrate, respectively.
- a surface is constituted by two surfaces of a certain first surface and a second surface on which the second protective film is formed, and the first surface and the second surface respectively include:
- An information recording medium that irradiates a light beam and reproduces recorded information based on a change in light intensity of reflected light, a distance from a first recording surface of the substrate to the first surface, and The distance from the second recording surface of the substrate to the second surface is bX / (4n) or more and 0.6 or more. mm or less ( ⁇ is the wavelength of the light beam, ⁇ is the light refractive index of the first or second protective film of the light of the wavelength ⁇ ), and the thickness of the substrate is 0.6 mm or more. 2 mm or less, and the distance from the first surface to the second surface is 1.2 mm or less.
- An information recording medium characterized by the fact that it has been proposed.
- the purpose of these is to provide an information recording medium that can secure a sufficient tilt margin and mechanical strength even when the recording density is increased.
- An optical recording medium in which at least a recording layer and a transparent protective layer are sequentially formed on a substrate, and light is incident from the transparent protective layer side to record and Z or reproduce an information signal.
- the substrate has a first resin layer forming the surface on which the recording layer is formed, and a flexural modulus higher than that of the resin material forming the first resin layer laminated on the first resin layer.
- An optical recording medium "characterized by comprising a second resin layer made of a resin material having a large thickness.
- U.S. Pat. No. 6,201,833 Japanese Patent Application Laid-Open No. 2000-114,149 discloses that "a substrate and A disc-shaped information recording medium that has a recording layer for recording information signals and a transparent protective layer laminated on the recording layer, and records information signals by reproducing light from the transparent protective layer side.
- This substrate has a resin core layer and an integral part of the core layer. On one surface of the substrate, there is an unevenness of the information signal on the recording layer side, and the substrate is made of a resin having fluidity compared to the core layer.
- An information recording medium characterized by comprising a resin having a water absorption of 0.3% or less as a surface resin of a substrate. The direction to solve the problem with a complicated substrate configuration by sandwich molding is indicated.
- an object of the present invention is to provide a substrate having a thickness of 0.3 to 2.0 mm, comprising a thermoplastic resin, provided with emboss pits or guide grooves. It has a reflective layer provided thereon and a transparent protective layer having a thickness of 3 to 200 m provided thereon, and irradiates an optical beam from the surface side of the transparent protective layer to reduce the reflected light.
- the substrate includes: (i) at least one selected from the group consisting of 1,1-bis (4-hydroxyphenyl) -1,3,3,5-trimethylcyclohexane and 9,9-bis (4-hydroxy-3-methylphenyl) fluorene Formed from a thermoplastic resin containing at least 50% by weight of an aromatic polycarbonate resin polymerized as a bisphenol component containing a dihydroxy compound containing at least 20% by mole of one kind of aromatic dihydroxy compound with respect to the total dihydroxy compound. More generally, the substrate is
- thermoplastic resin having the following characteristics (1) to (4).
- the deflection temperature under load is 125 C or more and
- the optical recording medium of the present invention is an optical recording medium for recording and reproducing a recording medium by irradiating an optical beam from a surface side of a transparent protective layer of 3 to 200 m, and recording and reproducing a large amount of information. It can be applied to an optical recording medium using a short-wavelength laser (for example, a blue-violet semiconductor laser having a wavelength of 405 nanometers). Such an optical recording medium is sometimes referred to as a Blu-ray Disc, distinguishing it from a conventional CD or DVD.
- a short-wavelength laser for example, a blue-violet semiconductor laser having a wavelength of 405 nanometers.
- Such an optical recording medium is sometimes referred to as a Blu-ray Disc, distinguishing it from a conventional CD or DVD.
- FIG. 1 shows a partial schematic view of a perpendicular cross section of a disk surface in an example of an optical recording medium applied to the present invention.
- FIG. 4 shows a partial schematic view of a perpendicular cross section of a disk surface in another example of the optical recording medium applied to the present invention.
- FIG. 4 shows a partial schematic view of a perpendicular cross section of a disk surface in another example of the optical recording medium applied to the present invention.
- This graph shows the change over time in Ti 1 t at a position 58 mm from the center of the optical disk caused by environmental changes, based on a stable time.
- FIGS. 1 to 3 are partial schematic views each showing an example of the optical recording medium of the present invention, which is a vertical cross section on the disk surface. Note that the configuration of the optical recording medium proposed in the present invention is not limited to the examples described here.
- an optical recording medium 1 to which the present invention is applied is one in which a light reflecting layer 3, a recording layer 4, and a transparent protective layer 5 are sequentially laminated on a substrate 2 having a guide groove.
- a substrate 2 having a guide groove.
- guide grooves formed of predetermined irregular patterns such as phase pits for recording data information and tracking servo signals, and fine irregularities such as pre-groups. .
- the optical recording medium 2 has a multilayer structure in which a recording film or a reflective layer and a plurality of transparent protective layers are laminated on a substrate 2 having a guide groove, as shown in FIG. Further, the optical recording medium 3 is characterized in that embossed pits or guide grooves are provided on both sides of the substrate 2 as shown in FIG. 3, and the reflection layer and the transparent protective layer are both sequentially laminated on both sides. .
- materials having the same or similar characteristics can be used for the substrate, light reflection layer, recording layer, and transparent protective layer that constitute these optical recording media (optical disks).
- optical disk the substrate constituting the optical recording medium of the present invention
- the substrate 2 has a thickness of 0.3 to 2.0 mm, preferably 0.5 to 1.1 mm.
- the transparent protective layer has a thickness of 3 to 200 m, preferably 10 to 120 m.
- the total thickness of the substrate and the transparent protective layer is the actual thickness of the optical recording medium shown in FIG. About 1.2 mm.
- the flexural modulus of the thermoplastic resin used for the substrate 2 is preferably 24,000 kgf / cm 2 or more, more preferably 26,000 kgf Z cm 2 or more. Most preferably, it is 27,00 Okg cm 2 or more. If the flexural modulus is less than 24,000 kgf Zcm 2, the runout that occurs when the molded optical disk rotates at high speed increases, which is not preferable as an optical disk that requires a high-density storage capacity. The higher the flexural modulus is, the better the formability can be maintained. Typically 37, 000 kg iZcm 2 or less, preferably 35, 000 kg ⁇ Zc m 2 or less.
- the thermoplastic resin of the present invention preferably has a saturated water absorption of 0.33% by weight or less when immersed in 23X: pure water. More preferably, the content is 0.30% by weight or less. Most preferably, the saturated water absorption is 0.27% by weight or less. If the saturated water absorption exceeds 0.33% by weight, the optical disk is likely to be warped and deformed in the process of absorbing and dehumidifying, which tends to cause a focus error and a tracking error.
- the following measurement method was used for the warpage deformation of the optical disc during the moisture absorption and dehumidification processes. In other words, it occurs when the disc is exposed to an environment with a temperature of 30 and a humidity of 90% RH (environment A) until it reaches the saturated water absorption, and then moved to an environment with a temperature of 23 ° C and a humidity of 50% RH (environment B).
- the change in tilt (Tilt) at 58 mm from the center is measured over time, and the difference ( ⁇ i 1 t) between the maximum value of the tilt (Tilt) change and the value when the steady state is reached is compared. is there.
- ⁇ ⁇ ⁇ ⁇ ⁇ i 1 t of the disk is 0.6 degrees or less, preferably 0.5 degrees or less.
- the thermoplastic resin according to the present invention preferably has a deflection temperature under load (HDT) measured at 1.82 MPa according to ASTM D-648 of 125 ° C or more, more preferably 127 ° C or more. Is more preferable, and 129 ° C. or higher is even more preferable. If the deflection temperature under load is lowered, the heat resistance of the disc becomes insufficient.
- the load deflection temperature is generally 150 ° C or less, preferably 140 ° C or less when applied to ordinary injection molding.
- the thermoplastic resin preferably has a loss tangent (tan ⁇ ) value of 0.006 or more, more preferably 0.006, measured at 40 ° C. and 18 Hz according to ISO 6721-4. 008 or more, and most preferably 0.01 or more. If the loss tangent (tan (5) is less than 0.06), the vibration damping property of the resin is reduced, and the surface run-out that occurs when the molded optical disk rotates at high speed is not preferable.
- the upper limit of (tan S) is generally 0.08 or less, usually 0.07-or less.
- the resin is required to have a high transfer rate to guide grooves (groups) during molding.
- the transfer rate of the resin is suitably 95% or more, preferably 98% or more.
- the recording and Z or reproduction of the information signal is performed by irradiating light from the transparent protective layer 5 side, so that the substrate 2 does not affect the optical recording and Z or reproduction characteristics. It does not provide and does not require any particular transparency.
- a blend of two or more resins with significantly different refractive indices generates haze due to light scattering, so it is easy to use it as a substrate material for conventional CDs, DVDs, etc. that require optical characteristics.
- examples of such a thermoplastic resin will be described.
- the thermoplastic resin forming the substrate in the present invention is not limited to the following examples as long as the properties satisfy the above (1) to (4).
- the thermoplastic resin according to the present invention may be any resin that has a low water absorption, a good damping property and a good bending elastic modulus, and a resin having good heat resistance as a disc material and satisfying the above characteristics.
- a thermoplastic resin can be selected from a polycarbonate resin, an amorphous polycyclic olefin, hydrogenated polystyrene, and the like.
- a thermoplastic resin mainly composed of a polycarbonate resin is used. It is preferable to choose from.
- the polycarbonate resin is usually obtained by polymerizing an aromatic dihydroxy compound and a carbonate bond precursor by, for example, a solution method or a melting method.
- the aromatic dihydroxy compound used here can be any compound as long as the above conditions can be satisfied.
- the a, '-bis (4-hydroxyphenyl) m-diisopropylbenzene is a compound represented by the following chemical structural formula.
- the polycarbonate resin may be a homopolycarbonate using the above-mentioned aromatic dihydroxy compound alone, or may be a copolycarbonate using two or more thereof. Further, a copolycarbonate obtained by combining the above-mentioned aromatic dihydroxy compound with another dihydroxy compound may be used.
- An example of another dihydroxy compound is 2,2-bis (4-hydroxyphenyl) propane (bisphenol A).
- polyphenol resin made of bisphenol A alone does not fall under the category of resins satisfying all of the above properties (1) to (4) of the present invention.
- the polycarbonate resin may be used alone or as a blend of two or more.
- Preferred resin compositions are 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane (a-l component) and 9,9-bis (4-hydroxy-3-methylphenyl) )
- a dihydroxy compound containing at least 20 mol% of at least one aromatic dihydroxy compound (component A) selected from the group consisting of fluorene (a-two components) with respect to all dihydroxy compounds is polymerized as a bisphenol component.
- component A aromatic dihydroxy compound selected from the group consisting of fluorene (a-two components) with respect to all dihydroxy compounds is polymerized as a bisphenol component.
- a thermoplastic resin containing 50% by weight or more of an aromatic polycarbonate resin.
- thermoplastic resins include 1,1-bis (4-hydroxyphenyl) -13,3,5-trimethylcyclohexane and Z or 9,9 —Bis (4-hydroxy-13-methylphenyl) fluorene and ⁇ , ⁇ ′-bis (4-hydroxyphenyl) m-diisopropylbenzene in a ratio of 20:80 to 70:30, preferably 40:60 to 70:30
- examples include a copolymerized polycarbonate resin obtained by reacting a bisphenol component contained in a molar ratio with a carbonate precursor, or a blended polycarbonate composition thereof.
- the polycarbonate resin is preferably one in which 0.7 g of the polymer is dissolved in 10 Oml of methylene chloride and has a specific viscosity of 0.2 to 0.5 measured at 20 ° C., and 0.25 to 0.4. Is more preferable. If the specific viscosity is less than 0.2, the molded product becomes brittle. If the specific viscosity is higher than 0.5, the melt fluidity is poor, and molding failure occurs, and it is difficult to obtain an optically good molded product.
- the thermoplastic resin of the present invention may contain at least one phosphorus compound selected from the group consisting of phosphoric acid, phosphorous acid, phosphonic acid, phosphonous acid and esters thereof as a heat stabilizer. These phosphorus compounds may be condensates. By blending this phosphorus compound, the thermal stability of the resin for an optical disk is improved, and a decrease in molecular weight and deterioration of hue during molding are prevented.
- the amount of the heat stabilizer is 0.001 to 0.05% by weight, preferably 0.0005 to 0.02% by weight, more preferably 0.001 to 0.02% by weight, based on the thermoplastic resin. 1% by weight is particularly preferred.
- the thermoplastic resin of the present invention may contain an antioxidant generally known for the purpose of preventing oxidation.
- examples thereof include phenolic antioxidants.
- the preferable range of the addition amount of these antioxidants is 0.0001 to 0.05% by weight with respect to the thermoplastic resin.
- thermoplastic resin of the present invention a higher fatty acid ester of a monohydric or polyhydric alcohol can be added to the thermoplastic resin of the present invention, if necessary.
- a higher fatty acid ester of a monohydric or polyhydric alcohol By blending the higher fatty acid ester of a monohydric or polyhydric alcohol, the releasability from the mold at the time of molding the thermoplastic resin is improved. Typeless Deformation of the disk substrate and pit shift due to good quality can be prevented. There is also an advantage that the melt fluidity of the thermoplastic resin is improved.
- the compounding amount of the ester of the alcohol and the higher fatty acid is 0.01 to 2% by weight, preferably 0.015 to 0.5% by weight, and more preferably 0.02 to 2% by weight based on the thermoplastic resin. ⁇ 0.2% by weight is more preferred.
- the resin for the optical disc substrate of the present invention further contains additives such as a thermoplastic resin, a light stabilizer, a coloring agent, an antistatic agent, a lubricant, and the like, in the transferability, and in the process of absorbing and dehumidifying the molded disc. It can be added within a range that does not impair the warp reduction effect.
- the mixing of the polycarbonate resins and the mixing with the resin or other resins may be performed at each stage of the molded article such as a polymer solution, a powder or granules,
- a container with a stirrer is mainly considered at the stage of the polymer solution, and at the stage of a molded product such as a granular material and a pellet, for example, a tumbler, a V-type blender, and a Nowaichi.
- a method of mixing with a mixer, Banbury mixer, kneading roll or extruder is used.
- an arbitrary method can be adopted, and there is no particular limitation.However, a method of passing the mixture in a polymer solution state and then passing through a filter having an appropriate aperture is preferable because of a simple method of removing foreign matter during the mixing operation. preferable.
- a solvent in which both the polycarbonate resin and the other resin are soluble In this case, it is preferable to remove impurities and foreign substances such as unreacted components by performing a filtration treatment in a solution state. Extrusion step of obtaining a pellet-shaped resin composition for further injection molding
- the (pelletizing step) it is preferable to remove foreign matter by passing through a sintered metal filter or the like having a filtration accuracy of 50 or less in a molten state. If necessary, it is also preferable to add an additive such as a phosphorus-based antioxidant. In any case, it is necessary to minimize the content of foreign materials, impurities, and solvents in the raw resin before injection molding.
- an injection molding machine including an injection compression molding machine equipped with a stamper that achieves the pitch and group satisfying the specifications required for the optical recording medium and the surface accuracy. And made by injection molding.
- the thickness of the disk substrate is set to 0.3 to 2.0 mm.
- This injection molding machine may be a commonly used one, but from the viewpoint of suppressing the generation of carbides and increasing the reliability of the disk substrate, the adhesion between the cylinder screw and the shelf is low, and the corrosion resistance is high. It is preferable to use a material made of a material having wear resistance.
- the environment in the molding step is preferably as clean as possible in view of the object of the present invention. It is also important to sufficiently dry the material to be molded to remove water and to prevent stagnation that may cause decomposition of the molten resin.
- the resin for an optical disk substrate in the present invention has sufficient fluidity to improve transferability during injection molding or injection compression molding.
- the optical disk substrate of the present invention becomes an optical disk by forming at least a reflective film on one surface thereof.
- a metal element can be used alone or in combination.
- A1 and Au are used alone, or 0.5 to 10% by weight, particularly preferably 3.0 to 10% by weight of A1 alloy containing Ti. It is preferable to use an A1 alloy containing 5% by weight or more and 10% by weight or less of Cr.
- the reflection film can be formed by a method such as an ion beam sputtering method, a DC sputtering method, or an RF sputtering method.
- This metal thin film (reflective layer) alone may be used, but in addition, a recording layer 4 (a phase-change film and a dye for DVD-RAM and DVD-R, and a magneto-optical recording for a magneto-optical disk). And a transparent protective layer 5 formed thereon to form the optical disk of the present invention.
- a recording layer 4 a phase-change film and a dye for DVD-RAM and DVD-R, and a magneto-optical recording for a magneto-optical disk.
- a transparent protective layer 5 formed thereon to form the optical disk of the present invention.
- phase change film recording material layer for example, a simple chalcogen or chalcogen compound is used. Specifically, each element of Te and Se, Ge-Sb-Te, Ge-Te, In-Sb-Te, InSe-Te-Ag, InSe, InSe-T1- Co, I nS bS e, B i 2 Te 3, B i Se, Sb 2 S e 3, S b 2 A chalcogenite-based material such as Te 3 is used.
- the magneto-optical recording film layer As the magneto-optical recording film layer, a perpendicular magnetization film having magneto-optical properties such as a force effect / Faraday effect, such as an amorphous alloy thin film such as Tb-Fe-Co, is used.
- the transparent protective layer 5 is formed on the recording layer 4.
- the transparent protective layer 5 is made of a material that transmits laser light. Examples of such a material include a thermoplastic resin such as a polyolefin resin and an amorphous polycyclic olefin resin, and various thermosetting resins. Are listed.
- Means for forming the transparent protective layer include, for example, a method of laminating a transparent plate such as a glass plate or the like made of a thermoplastic resin such as a polyolefin resin, an amorphous polycyclic olefin resin on the recording layer 4,
- a method of laminating a transparent plate such as a glass plate or the like made of a thermoplastic resin such as a polyolefin resin, an amorphous polycyclic olefin resin on the recording layer 4
- An example is a method in which an ultraviolet curable resin is applied by a method such as spin coating, and is formed by irradiation with ultraviolet light.
- the thickness of the transparent protective layer is limited to 3 to 200 m in order to keep coma aberration small.
- the transparent protective layer is preferably formed of a transparent resin which satisfies the same properties (1) to (4) as the thermoplastic resin of the substrate of the present invention, and is formed of the same resin as the substrate resin. Is particularly preferred.
- a dielectric layer may be provided to control optical characteristics and thermal characteristics.
- the light reflection layer 3, the first dielectric layer, the recording layer 4, the second dielectric layer, and the transparent protective layer 5 can be formed on the substrate 2.
- the measurement was performed under a load of 1.82 MPa according to ASTM D-648.
- a disk substrate of 12 Om ⁇ , 1.2 mm thickness was prepared from each pellet using M35B-D-DM manufactured by Meiki Seisakusho Co., Ltd. equipped with a stamper with a group depth of 40 nm and a group pitch of 0.6 m. Injection molded. Table 1 shows the molding conditions for each substrate (set to conditions that give a high transfer rate). Then, a reflective film, a dielectric layer 1, a phase change recording film, and a dielectric layer 2 having the following structures are sequentially deposited on the disk substrate obtained by injection molding by sputtering, and a polycarbonate thin film cover layer is laminated thereon. Thus, the desired optical disk was obtained.
- Reflective film 100 nm Ag, Pt, Pd, Cu-alloy (Vnaxis TTT40-A) layer
- Dielectric layer 1 15 nm Z n S ⁇ S i O 2 layer
- Phase change recording film 15nm GeSbTe layer
- Dielectric layer 2 40 nm ZnS ⁇ Si ⁇ 2 layers
- Cover layer 80 rn polycarbonate (C-1400, Teijin Chemicals Ltd.) layer with 20 m of isocyanate cross-linked acrylic adhesive
- the 10 discs were left in an environment at a temperature of 23 ° C and a humidity of 50% RH for 2 days or more, with the spacers sandwiched so as not to contact each other.
- the Ti 1 t (initial disk) is measured using the DLD-3000U three-dimensional shape measuring device manufactured by Japan, Ltd. Shape) and evaluated as initial mechanical properties. Values are averages of 10 disks.
- the disks whose initial mechanical properties were evaluated were exposed to a temperature of 30 ° (: 90% RH environment (A environment) until saturated water absorption was reached, and then exposed to a temperature of 23 and a 50% RH environment (B environment). Moved.
- the product is diluted with methylene chloride, washed with water, acidified with hydrochloric acid, and washed with water.
- methylene chloride is evaporated in a kneader equipped with a chamber, and the component a-1 and 86.4 parts of a colorless polymer having a molar ratio of component a-2 of 53:47 and a specific viscosity of 0.27 was obtained (yield 97%).
- the methylene chloride phase was acidified with hydrochloric acid, and the centrifugation operation was repeated under the same conditions.
- the methylene chloride was evaporated by a kneader provided with an isolation chamber with a foreign material outlet in the bearing part, and 2,400 parts of powdery and granular colorless polycarbonate resin (yield 92%) Got.
- the product was diluted with methylene chloride, washed with water, acidified with hydrochloric acid, and washed with water.
- methylene chloride is evaporated in a kneader provided with a chamber, and 86.4 parts of a colorless polymer having a molar ratio of component a-1 to component a-2 of 53:47 and a specific viscosity of 0.27 is obtained. (97% yield)
- the weight ratio of the polymer in the solution (polymer A) was obtained by mixing the homopolymer of bisphenol A (polymer A) synthesized in (A) with a methylene chloride solution and the copolymer of polymer B synthesized in (B) with a methylene chloride solution. : Polymer B) was added to the stirrer-equipped container such that the ratio became 80:20, and then stirred and mixed. After mixing, the mixture was passed through a filter having an aperture of 0.3 zm, and then the mixed solution was poured into a kneader provided with an isolation chamber having a foreign substance outlet in the bearing portion, and methylene chloride was evaporated to evaporate the polycarbonate. Pone-grain powder was obtained.
- An optical disk was prepared in the same manner as in Example 1, and each characteristic was evaluated.
- Example 4 320. 32 118 127 26 100
- Example 1 0.21 0.20 0.37 0.014 100
- Example 3 0.32 0.30 0.59 0.007 100
- Comparative Example 1 2.00 0.36 5.00 or more 0.078 100
- Comparative Example 2 0.05 0.35 0.01 or less 0.015 100
- the resins shown in Examples 1 to 4 and the resin of Example 5 have a saturated water absorption of 0.33% by weight or less and a deflection temperature under load of 125 ° C or more.
- AT i 1 t can be suppressed to 1.0 or less.
- the flexural modulus and the loss tangent (tanS) are sufficiently large, it was possible to suppress the surface runout that occurs when the molded optical disk rotates at high speed.
- the AT i 1t was extremely large at 5.0 or more, which proved to be unsuitable for practical use.
- the polystyrene of Comparative Example 2 had a low water absorption, so that ⁇ ⁇ 1t could be kept very small, but the glass transition point (T g) was low, and the heat resistance as a disk substrate was insufficient. The result was.
- the polycarbonate resin of Comparative Example 3 had a slightly higher saturated water absorption of 0.35% and a slightly insufficient flexural modulus, so that the properties of the optical disc substrate were not sufficiently satisfactory.
- the maximum change value ( ⁇ ⁇ i 1 t) of 0.7 ° has a risk of interfering with the reading of the record.
- the substrate of Comparative Example 3 had a low transfer rate, and the molding characteristics as the substrate were unsatisfactory.
- the optical recording medium of the present invention at least a reflective film, a recording layer, and a transparent protective layer are sequentially formed on a substrate, and light is irradiated from the transparent protective layer side to record and / or reproduce information symbols. It is intended for optical discs to be performed. Some optical disks have a recording capacity of more than 15 GB on one side of a disk with a diameter of 12 cm, but the optical disk substrate of the present invention does not have a complicated structure and can be used for these optical disks. It is possible to
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Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60229888T DE60229888D1 (de) | 2002-07-09 | 2002-07-09 | Optisches aufzeichnungsmedium |
JP2004519190A JPWO2004005371A1 (ja) | 2002-07-09 | 2002-07-09 | 光学記録媒体 |
EP02743880A EP1518880B1 (en) | 2002-07-09 | 2002-07-09 | Optical recording medium |
US10/488,704 US6875489B2 (en) | 2002-07-09 | 2002-07-09 | Optical recording medium |
PCT/JP2002/006952 WO2004005371A1 (ja) | 2002-07-09 | 2002-07-09 | 光学記録媒体 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/006952 WO2004005371A1 (ja) | 2002-07-09 | 2002-07-09 | 光学記録媒体 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004005371A1 true WO2004005371A1 (ja) | 2004-01-15 |
WO2004005371A8 WO2004005371A8 (ja) | 2005-04-07 |
Family
ID=30022630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2002/006952 WO2004005371A1 (ja) | 2002-07-09 | 2002-07-09 | 光学記録媒体 |
Country Status (5)
Country | Link |
---|---|
US (1) | US6875489B2 (ja) |
EP (1) | EP1518880B1 (ja) |
JP (1) | JPWO2004005371A1 (ja) |
DE (1) | DE60229888D1 (ja) |
WO (1) | WO2004005371A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012514280A (ja) * | 2008-12-25 | 2012-06-21 | バイエル・マテリアルサイエンス・アクチェンゲゼルシャフト | 高速光ディスク用基板材料 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1294177C (zh) * | 2002-03-28 | 2007-01-10 | 帝人化成株式会社 | 聚碳酸酯共聚物和由该共聚物制成的耐热部件 |
US7407698B2 (en) * | 2003-05-07 | 2008-08-05 | Ricoh Company, Ltd. | Flexible optical disk |
US7767284B2 (en) * | 2004-04-28 | 2010-08-03 | Ricoh Company, Ltd. | Optical recording medium, and, method for manufacturing the same, and method and apparatus for optical recording and reproducing thereof |
JP2006313585A (ja) * | 2005-05-06 | 2006-11-16 | Toshiba Corp | 光ディスク、光ディスクの製造方法、情報再生装置、情報再生方法、情報記録装置、および情報記録方法 |
EP2051251A1 (en) | 2007-10-19 | 2009-04-22 | Bayer MaterialScience AG | Disc shaped high density recording medium |
KR20110113620A (ko) | 2008-12-25 | 2011-10-17 | 바이엘 머티리얼사이언스 아게 | 디스크 형상의 고밀도 기록 매체 |
CN102265342B (zh) * | 2008-12-25 | 2014-11-12 | 拜尔材料科学股份公司 | 用于高速光盘的基片材料 |
US8277919B2 (en) * | 2009-07-23 | 2012-10-02 | VMO Systems, Inc. | Reflective coating for an optical disc |
EP2336246A1 (de) * | 2009-12-12 | 2011-06-22 | Bayer MaterialScience AG | Copolycarbonat-Zusammensetzungen mit verbesserten thermischen Eigenschaften auf Basis von Blends |
US8691915B2 (en) | 2012-04-23 | 2014-04-08 | Sabic Innovative Plastics Ip B.V. | Copolymers and polymer blends having improved refractive indices |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000109669A (ja) * | 1998-10-02 | 2000-04-18 | Teijin Chem Ltd | 芳香族ポリカーボネート樹脂組成物および光学用成形品 |
US6159572A (en) * | 1998-04-03 | 2000-12-12 | Kabushiki Kaisha Toshiba | Information recording medium and method of manufacturing resinous substrate for use in the recording medium |
JP2002117580A (ja) * | 2000-10-03 | 2002-04-19 | Teijin Chem Ltd | 光ディスク基板および光ディスク |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5633060A (en) * | 1994-07-08 | 1997-05-27 | Teijin Chemicals, Ltd. | Optical disk substrate, optical disk and aromatic polycarbonate resin |
KR100718864B1 (ko) * | 1999-12-14 | 2007-05-16 | 데이진 가세이 가부시키가이샤 | 제진성 열가소성 수지 조성물 및 성형품 |
DE10001036A1 (de) * | 2000-01-13 | 2001-07-19 | Bayer Ag | Polycarbonat-Substrate |
KR100454176B1 (ko) * | 2000-03-29 | 2004-10-26 | 데이진 가부시키가이샤 | 광기록 매체용 보호막 및 광기록 매체 |
JP3718627B2 (ja) * | 2000-10-20 | 2005-11-24 | 帝人化成株式会社 | 湿式成形用ポリカーボネート樹脂の保存方法 |
JP2001220508A (ja) * | 2000-10-23 | 2001-08-14 | Teijin Chem Ltd | 芳香族ポリカーボネート樹脂組成物および光学用成形品 |
JP2002334482A (ja) * | 2001-05-10 | 2002-11-22 | Teijin Chem Ltd | 光学記録媒体 |
CN1294177C (zh) * | 2002-03-28 | 2007-01-10 | 帝人化成株式会社 | 聚碳酸酯共聚物和由该共聚物制成的耐热部件 |
-
2002
- 2002-07-09 EP EP02743880A patent/EP1518880B1/en not_active Expired - Lifetime
- 2002-07-09 US US10/488,704 patent/US6875489B2/en not_active Expired - Fee Related
- 2002-07-09 JP JP2004519190A patent/JPWO2004005371A1/ja active Pending
- 2002-07-09 WO PCT/JP2002/006952 patent/WO2004005371A1/ja active Application Filing
- 2002-07-09 DE DE60229888T patent/DE60229888D1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6159572A (en) * | 1998-04-03 | 2000-12-12 | Kabushiki Kaisha Toshiba | Information recording medium and method of manufacturing resinous substrate for use in the recording medium |
JP2000109669A (ja) * | 1998-10-02 | 2000-04-18 | Teijin Chem Ltd | 芳香族ポリカーボネート樹脂組成物および光学用成形品 |
JP2002117580A (ja) * | 2000-10-03 | 2002-04-19 | Teijin Chem Ltd | 光ディスク基板および光ディスク |
Non-Patent Citations (1)
Title |
---|
See also references of EP1518880A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012514280A (ja) * | 2008-12-25 | 2012-06-21 | バイエル・マテリアルサイエンス・アクチェンゲゼルシャフト | 高速光ディスク用基板材料 |
KR101604156B1 (ko) * | 2008-12-25 | 2016-03-16 | 바이엘 머티리얼사이언스 아게 | 고속 광학 디스크용 기판 물질 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2004005371A1 (ja) | 2005-11-04 |
EP1518880A4 (en) | 2006-03-08 |
EP1518880A1 (en) | 2005-03-30 |
US20040241375A1 (en) | 2004-12-02 |
EP1518880B1 (en) | 2008-11-12 |
DE60229888D1 (de) | 2008-12-24 |
US6875489B2 (en) | 2005-04-05 |
WO2004005371A8 (ja) | 2005-04-07 |
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