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JP04232629 |
PURPOSE: To provide a process for producing a grooved substrate particularly suitable for optical disks and a multilayered structural body. CONSTITUTION: This process for producing the grooved substrate and more particularly the substrat...
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JP04228130 |
PURPOSE: To enhance the rigidity of an optical disk by casting a molten resin into the surface patterns of a metal mold, curing the resin and joining the resin to a substrate on the side of the resin opposite to the metal mold, then remo...
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JP04228129 |
PURPOSE: To stabilize the surface patterns of a matrix in a method for forming a metal mold for producing optical disks. CONSTITUTION: The method for forming the metal mold for producing the optical disks includes a step of preparing the...
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JP04226724 |
PURPOSE: To prevent increase of DC modulation generated after a hub is mounted to an optical disc. CONSTITUTION: Birefringence of the inner peripheral part of a base sheet 1 after molding is made about 15-50nm larger than those of other ...
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JP04205936 |
PURPOSE: To reduce defects and to obtain a high-quality optical disk substrate by forming the rugged information pattern of a formed medium for transfer by etching. CONSTITUTION: A photoresist 3 is formed on a mirror-finished stamper wit...
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JP04172638 |
PURPOSE: To realize complete removal of residual oxidant with no consideration on the amount of treating agent to be added by feeding sea water, with a predetermined flow rate, to cells filled with granulated calcium sulfite. CONSTITUTIO...
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JP04159634 |
PURPOSE: To obtain a manufacturing method which facilitates small quantity and many types production or mass production with a relatively simple process by a method wherein minute protrusions are formed on an original disk composed of an...
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JP03293106 |
PURPOSE: To reduce the production cost of the title product and improve a working atmosphere by forming a metallic thin film on the profile forming face of a matrix, packing resin onto the matrix to harden the resin, and forming a metall...
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JP03283114 |
PURPOSE: To enable the production of an optical disk substrate having little surface waving and acceleration of waving, excellent mechanical characteristics and no burr on the outer edge by using such a jig to retain the outer rim of a s...
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JP03276434 |
PURPOSE: To easily form the optical disk substrate which is free from intrusion of bubbles by specifying the distance between the front end face of a dropping nozzle and a dropping surface to a specific value and dropping a radiation cur...
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JP03259419 |
PURPOSE: To improve surface property and CSS characteristics and to improve adhesion property of a magnetic film by specifying the surface roughness of a titanium substrate and forming a hardened layer of specified hardness by sputtering...
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JP03245330 |
PURPOSE: To substantially prevent the peeling of stampers from the specular roll and to prolong the life of the roll by fitting the respective detaining pieces respectively provided on the rear surfaces at both ends of the respective sta...
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JP03242840 |
PURPOSE: To uniformize the resin to be stuck to a substrate and to reduce the thickness of the disk by pressurizing the substrate via a plate material having elasticity from the rear surface of the substrate at the time of curing a liqui...
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JP03241541 |
PURPOSE: To fix and reinforce the rugged shape of the underlying layer transferred from a stamper and to obviate the chipping at the time of peeling of the underlying layer by having a penetration treatment process for penetrating a phot...
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JP03227208 |
PURPOSE: To remove inferior transfer, while the occurrence of fine spaces when a base plate is placed is omitted by a method in which while ultrasonic vibration is applied onto the surface of the matrix with fine shape, a stamper is coat...
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JP03227209 |
PURPOSE: To prevent the occurrence of bubbles by a method in which the diameter of the central hole of a plastic base plate is made smaller than the diameter of the central hole of the complete object of an optical disk, and the relation...
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JP03225645 |
PURPOSE: To prevent dust or the like from being taken-in and to uniformly apply ultraviolet setting resin by enlarging the size of a screen for applying the ultraviolet ray setting resin to a disk substrate rather than the moving range o...
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JP03225641 |
PURPOSE: To well transfer the rugged patterns of a stamper to a UV curing resin layer by maintaining the stamper in a constant temp. state and bringing the stamper into pressurized contact with a disk substrate coated with a UV curing re...
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JP03224145 |
PURPOSE: To improve the adhesiveness of a glass substrate and UV curing resin by subjecting the glass substrate before or after a coupling treatment to a heating treatment under a reduced pressure at the time of transferring the rugged p...
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JP03197113 |
PURPOSE: To exclude damage of a mold by guiding a product so as to move the same over the largest distance at two opposed end parts during the movement of the product in the direction remote from a substrate and gradually reducing the mo...
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JP03187038 |
PURPOSE: To execute molding at high-speed by eliminating the need for heating at high temp. and to reduce deformation of the moldings in the production process of an optical recording medium in which recording/reproducing can be performe...
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JP03176841 |
PURPOSE: To allow stable signal reading out with small surface roughness of a signal surface by executing the curing treatment after development under the conditions of the temp. and time at and for which a resist material melts. CONSTIT...
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JP03169526 |
PURPOSE: To mold a disclike molded product superior in molding accuracy by controlling a flow of resin to a cavity, by a method wherein a gate of the cavity is formed of a circumferential part between freely-movable sprue bushing on the ...
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JP03160638 |
PURPOSE: To obtain stabilized recording sensitivity by pressing a stamper on the recording layer on a transparent resin substrate and forming a preformat pattern. CONSTITUTION: A recording layer 2 is formed on a transparent resin substra...
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JP03155921 |
PURPOSE: To prepare a roll-shaped stamper capable or manufacturing a molding roll having no strain by forming an electroforming layer by the electroforming treatment of the conductive film fixed to an electroforming apparatus so as to ha...
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JP03147834 |
PURPOSE: To remarkably reduce curling and, in addition, make continuous and consistent manufacturing including the formation of protective layer possible by a method wherein web, which is made of the same material as base material, is fi...
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JP03132940 |
PURPOSE: To provide the practicable disk substrate consisting of aluminum by heating a disk substrate consisting of the aluminum and forming a boehmite film on the disk substrate. CONSTITUTION: The boehmite film is formed on Al. For exam...
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JP03132941 |
PURPOSE: To provide the optical disk suitable for production dealing with a small quantity and diversified kinds of video sound software with a relatively simple process by forming a resin stamper by using a 2P transfer method from a mas...
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JP03116564 |
PURPOSE: To make it possible to drastically simplify production processes for compact and video disks by using a master as a direct stamper in duplication stages. CONSTITUTION: A master/stamper exists on the surface of a substrate 10, ha...
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JP03116460 |
PURPOSE: To make it possible to optically read information including relief information tracks by pressurizing a stamper to emboss the exposed surface of a photosetting film and passing chemical rays through this film to cure the photose...
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JP03113748 |
PURPOSE: To produce the photomask having a long life by forming a light shielding thin film to the thickness at which the grooves formed on a substrate are filled and applying a photoresist thereon, then selectively exposing and developi...
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JP03113750 |
PURPOSE: To allow the transfer of fine preformats by sandwiching a resin sheet in a substantially non-solidified state by compression with a heated preformat roller and a press roller, thereby transferring rugged preformats. CONSTITUTION...
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JP03113751 |
PURPOSE: To produce the optical recording medium of a low cost with excellent mass productivity by continuously executing the transfer of preformats on a resin sheet and the formation of a recording layer contg. org. dyes by coating on t...
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JP03113749 |
PURPOSE: To produce the photomask having high reliability and a long life by forming a light shielding thin film on the groove forming surface of a substrate at the thickness at which the grooves are filled and setting the selection rati...
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JP03108140 |
PURPOSE: To prevent the intrusion of bubbles into a UV curing resin and to continuous produce the substrate with good productivity by using the rugged patterns of a rolled stamper which is plastically deformable and transferring the patt...
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JP03108139 |
PURPOSE: To make continuous operation and to improve productivity by subjecting a sheet substrate to a corona discharge treatment and irradiating a UV curing resin liquid packed between the substrate and a rolled stamper with UV rays, th...
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JP03105740 |
PURPOSE: To prevent the intrusion of bubbles and to allow the effective discharge of the bubbles by applying a radiation curing type resin on both of a transparent substrate or supporting sheet and a stamper having rugged pits stored wit...
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JP03104039 |
PURPOSE: To continuously produce the substrate free from warpage by reversing the directions of the warpage of the substrate taken up in the form of a roll and the warpage generated at the time of transferring and molding a UV curing res...
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JP03097525 |
PURPOSE: To enable a base plate with small double refraction to be productively manufactured by providing a rubber-based resin layer on a first roller in manufacturing the based resin layer on a first roller in manufacturing the base pla...
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JP03095738 |
PURPOSE: To improve productivity without defects such as air bubbles, etc., by applying ultraviolet-curing type resin to both a stamper and a sheet substrate, adhering surfaces, to which the resin is applied, together, irradiating the su...
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JP03073437 |
PURPOSE: To reduce the cost of production by rotating a glass substrate coated with a photoresist film by a rotating device and passing a laser beam through a transmission type diffraction grating to form plural light beams of an equal i...
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JP03073438 |
PURPOSE: To substantially prevent the generation of peeling and to allow the use under severe environment of a high temp. and high humidity by executing the irradiation to a substrate with UV rays between a substrate molding stage and a ...
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JP03069321 |
PURPOSE: To improve productivity by performing a reliable mold-release. by a method wherein a push-up pin is provided on the center of a stamper, an optical disk board in which a guide groove is formed is released from the stamper along ...
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JP03065326 |
PURPOSE: To advantageously prepare a stamper from the aspect of yield or cost by directly preparing a work stamper for a sol/gel from a glass original plate by 2P molding. CONSTITUTION: An SiO2 layer is formed on a glass original plate a...
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JP03065327 |
PURPOSE: To advantageously prepare a stamper from the aspect of yield and cost by directly preparing a work stamper for a sol/gel from a glass original plate by 2P molding. CONSTITUTION: A photosensitive resist is applied to a glass orig...
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JP03049057 |
PURPOSE: To produce the stamper having a good release property with a relatively short process by forming a release layer having low surface energy onto an Ni sheet having fine ruggedness. CONSTITUTION: The stamper 2 is constituted by fo...
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JP03044841 |
PURPOSE: To prevent intrusion of dust in the production process and to produce the medium at low cost by successively extruding molten resin into a strip to form a resin sheet, coating the sheet with UV-curing resin, transferring a rugge...
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JP03041642 |
PURPOSE: To produce the optical recording medium of a good dynamic balance with a simple stage without generating a recessed part in the outside shape by executing cutting by irradiation with light beams and increasing the cutting speed ...
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JP03042236 |
PURPOSE: To obtain a stamper capable of duplicating a disk substrate of high quality by providing a piercing hole having a specific diameter for sending a gas for releasing in the vicinity of the center of the stamper. CONSTITUTION: A pi...
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JP03039238 |
PURPOSE: To realize the favorable shape transferring properties of pre-groove pattern by a method wherein the initial current density of plating process for reproducing a son from a mother is set to be 5 - 10 times as large as that for r...
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