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JPH03197113A |
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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JPH03187038A |
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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JPH0346895B2 |
In a method of forming a video disc or a digital sound recording disc for example, a uniform layer of a predetermined thickness has to be applied to a substrate, and according to the invention, the layer material is applied in the form o...
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JPH03160638A |
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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JPH0341905B2 |
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JPH03147834A |
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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JPH0338098B2 |
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JPH03132940A |
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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JPH03132941A |
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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JPH03113749A |
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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JPH03113748A |
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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JPH03108139A |
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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JPH03105740A |
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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JPH0330931B2 |
PURPOSE:To produce the titled low-warpage, optical memory disc in a concentrically and uniformly oriented state, by injection-molding poly-4-methyl-1-pentene of a specified melt flow rate under specified conditions. CONSTITUTION:Poly-4-m...
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JPH03104039A |
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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JPH0397525A |
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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JPH0395738A |
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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JPH0373438A |
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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JPH0313865Y2 |
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JPH0369321A |
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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JPH0319049B2 |
This invention relates generally to a manner of cooling an injection mold assembly which is designed for molding a centrally apertured part such as a video disc. The mold assembly comprises two halves 14, each including a platen 148 whic...
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JPH0349057A |
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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JPH0314910B2 |
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JPH0314614B2 |
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JPH0344841A |
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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JPH0341642A |
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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JPH0342236A |
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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JPH0339238A |
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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JPH0339239A |
PURPOSE: To improve the releasability between a stamper and resin and conse quently prolong the service life of the stamper and reduce the cost of medium by a method wherein the surface of the stamper is covered by solid lubricant such a...
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JPH0337842A |
PURPOSE: To prevent the flawing on the grooved surface of the stamper for information recording by using a father stamper contg. ruggedness and producing a mother stamper by using a resin base material. CONSTITUTION: Resist patterns 5 fo...
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JPH0336022A |
PURPOSE: To prevent fluctuation in film thickness due to the stepped film thickness from developing by a method wherein the diameter of the roll of a roll stamper is set to be 5 times or more as large as the diameter of the stamper and t...
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JPH0336024A |
PURPOSE: To make the direct formation of fine projected and recessed patterns such as track grooves, information pits and the like on the peripheral wall of a cylindrical base material possible by a method wherein exposure is performed b...
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JPH0336023A |
PURPOSE: To facilitate the exchange of stamper at the changing-over of the kind of product by a method wherein a press plate, which is produced by forming guide tracks on a thermosetting or photo-setting resin layer produced on the surfa...
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JPH0336021A |
PURPOSE: To make it possible to form a stamper having no warpage without adhering dusts to and impairing a signal face by a method wherein high hard thin film made of oxide ceramics, nitride ceramics and carbide ceramics or their complex...
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JPH0330134A |
PURPOSE: To prevent deterioration of signal characteristics and to produce the information recording medium at low cost by subjecting a mother disk which has recessed recording signal to peeling treatment, electroforming with the mother ...
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JPH0326532A |
PURPOSE: To make it possible to suppress birefringence and to enhance productivity, by incorporating a specified phosphorous acid ester into a polycarbonate resin, and continuously extruding the resultant resin. CONSTITUTION: A bis(hydro...
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JPH0326373A |
PURPOSE: To improve the adhesion of a base material to UV-curing resin and to straighten the base material by irradiating the base material with UV before transfer while pressing a shaping roll against the base material. CONSTITUTION: A ...
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JPH0322230A |
PURPOSE: To make the back of a metallic main body completely smooth, to improve mass-productivity and to eliminate distortion to be generated when a stamper is peeled off from a glass master disk by adhering a reinforce disk to the back ...
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JPH035974B2 |
PURPOSE:To smooth a releasing process from a metal mold by forming a flexible backing support material for coating a resin having a radiant light curable resin filling gap provided between said support material and an information recordi...
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JPH0316709A |
PURPOSE: To obtain a high-quality product free from defective transfer or duplicated transfer, by a method wherein a stamper is fixed to a template under an expanded state during a period of time estending from the later half of a moldin...
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JPH0316720A |
PURPOSE: To obtain a board for an optical recording medium whose warp is little, by constituting the title method so that a base film to both sides of which ultraviolet- curing resin is applied is put between a stamper and impression dru...
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JPH0312039A |
PURPOSE: To realize the use of an optical disk at high-speed rotation by spreading photosetting resin between a supporting body and a transfer pattern, disposing an optical flat plate above the supporting body, inspecting flatness of the...
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JPH039835A |
PURPOSE: To solve the trouble such as the generation of fin without lowering productivity by a method wherein light is irradiated from either one side or from both sides of a transparent board side and of a stamper side by spreading phot...
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JPH038144A |
PURPOSE: To stabilize peelability after reproduction and to obtain the stamper having high quality by decreasing the potential difference between an anode and cathode for plating to zero in a plating stage for reproducing a mother from a...
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JPH0263260B2 |
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JPH02310016A |
PURPOSE: To obtain a low birefringent optical disc board by eliminating inequalty in a temperature distribution on the surface of a cavity at the time of injection of resin, by a method wherein the surface of a cavity is heated by provid...
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JPH02310027A |
PURPOSE: To reduce the time for producing a mother stamper, which defects are not easily generated on the group surfaces of the stampers for information- recording medium by producing the mother stamper from resin base. CONSTITUTION: Whi...
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JPH0262373B2 |
This invention relates generally to a manner of cooling an injection mold assembly which is designed for molding a centrally apertured part such as a video disc. The mold assembly comprises two halves 14, each including a platen 148 whic...
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JPH02307736A |
PURPOSE: To prevent the positional shift and slide at the time of transfer and to easily replace a stamper by providing the continuous feed holes engageable with the projections provided to the roller supporting the belt-like stamper to ...
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JPH02307737A |
PURPOSE: To eliminate the flaw of an optical disk generated by the change of the surface state of a stamper as the number of optical disks due to injection molding increases and to enhance the yield of injection molding under the same mo...
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