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JP2790648B2 |
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JPH10199054A |
To reduce the disk inclination by laminating disks back to back, which are coated with a photosetting adhesive material, irradiating a second disk front surface with light for a first prescribed time, irradiating a first disk front surfa...
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JPH10199041A |
To obtain a two-program information recording medium by covering the light reflection coating surfaces of one or both of first and second disks with a photosetting adhesive material in succession to the formation of these disks and stick...
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JP2778988B2 |
PURPOSE:To decrease the amt. of the unreacted monomer included in a surface part by irradiating the specific optical disk substrate with UV rays in an inert gaseous atmosphere to increase the degree of polymn. of the optical disk substra...
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JP2778939B2 |
To reduce the thickness fluctuation of a resin layer and, at the same time, to improve the productivity of a multilayered optical recording medium by forming a substrate unit layer by injecting molten resin between a transparent substrat...
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JPH10188356A |
To eliminate the need for use of adhesives over the entire part of substrates of an optical recording medium, such as DVD, formed by joining two sheets of the substrates by fixing two sheets of the substrates by a system to fit the subst...
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JP2771762B2 |
The invention relates to a device and a method for manufacturing a mould for a disc-shaped registration carrier, said device being provided with a station for applying a photosensitive layer, such as a photoresist layer, to a substrate, ...
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JP2767638B2 |
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JP2758288B2 |
Grooved substrates and multilayer structures, especially suitable for optical disks, are taught. The major process steps include spin coating of a supporting plate (1) with dissolved material forming a soft layer (7) thereon, stamping gr...
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JP2751395B2 |
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JP2748547B2 |
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JPH10106049A |
To prevent the warpage of a substrate due to contraction of a resin immediately after manufacture of a multilayered optical recording medium, the warpage, etc., of the substrate due to water absorption and dehydration of steam in the air...
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JP2742090B2 |
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JPH1087050A |
To provide a disk carrying mechanism which can carry disks by maintaining the evenness of the temperature distribution of the disk, and a disk dryer which can dry the disks evenly by using the above disk carrier mechanism. By rotating (R...
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JP2733579B2 |
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JP2718992B2 |
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JP2714188B2 |
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JP2709144B2 |
PURPOSE:To make a substrate flat with respect to a secular change and a thermal change by previously correcting the secular change of the form of the plastic substrate and a change quantity owing to thermal stress, film stress and the li...
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JP2708847B2 |
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JP2708229B2 |
PURPOSE:To improve properties such as low absorptivity for water, heat resistance and hardness of a disk and to obtain proper viscosity in the molding process by incorporating stylene macro monomers containing polystylene units in its ma...
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JPH1029724A |
To increase/decrease the number of stations with a simple method by composing each station of a plate interposed continuously between two side walls and the side walls and moving a transport mechanism among various stations on a guiding ...
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JP2698148B2 |
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JPH1011800A |
To provide an optical disk with which the sure suppression of the swelling out of an excess adhesive is possible, the suppression of the deformation accompanying the heat at the time of photosetting is possible, and the possibility of im...
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JP2693585B2 |
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JP2672170B2 |
A roll-stamper for forming substrates of an information-recording medium includes at least one stamper being fastened along a peripheral face of a mirror roller, carrying on a surface thereof patterns each corresponding to a preformat fo...
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JP2670865B2 |
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JP2546013Y2 |
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JP2644877B2 |
PURPOSE:To measure the amplitude of an wobble pit and evaluate a manufacturing state in the manufacturing process of the disk by providing a group for deflection quantity monitor and a reference group in one part of a master disk. CONSTI...
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JP2642158B2 |
A mold for forming an optical disk base provided with a movable specuiar plate (1), a stationary specular plate (2), an annular stamper (12) having inner and outer peripheral edges. The reverse surface of the stamper is in contact with o...
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JP2640535B2 |
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JPH09180251A |
To assure a sufficient printing display part without flawing even being stacked, by transferring the information patterns inscribed on a stamper surface, cutting unnecessary materials to be molded, forming stack ribs on one surface and s...
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JPH09174589A |
To prevent the abnormality of birefringence due to local support and deformation etc., of a substrate for an optical disk in annealing by implementing annealing in which the inner and outer peripheral parts of the substrate are covered a...
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JP2622880B2 |
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JP2622871B2 |
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JP2622879B2 |
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JPH09167385A |
To suppress the deformation of a stamper of a 2P molding device and the occurrence of foreign matter. This device transfers the patterns of a stamper surface to a transparent substrate by bringing a transparent substrate and the stamper ...
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JPH09155986A |
To improve the mechanical properties of a laminated disc. A disc substrate D capable of storing different types of information at the same time is molded by packing a molten resin by injection into paired cavities formed when molding die...
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JP2612622B2 |
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JPH09134545A |
To provide a high density optical disc on which digital information is optically recorded in a plurality of reflective layers and also provide a method of mass-production of an optical disc. Each thickness of a plurality of layers of an ...
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JP2607961B2 |
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JPH09115191A |
To obtain an optical disk of a multilayered structure having excellent accuracy and productivity. A substrate 4 and a stamper 21 are superposed on each other interposing a radiation-curing resin 22 between them and, thereafter, the subst...
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JPH09109276A |
To provide a method for manufacturing a high-quality stamper at a high yield by automated steps. This method for manufacturing a stamper for an optical disc consists of a photosensitive layer forming step of forming a photosensitive laye...
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JPH0991769A |
To obtain a metal mold capable of absorbing the dimensional tolerance for production of a stamper for molding an optical disk having a good double refractive index distribution by specifying the range of the total volume of the clearance...
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JPH0973670A |
To lessen the formation of the flashes of a UV curing resin protruding from the outer periphery of a rotary stamper by forming the outside diameter of a substrate and the outside diameter of the rotary stamper nearly equal to each other....
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JPH0973671A |
To easily and rapidly form a spacer layer made uniform over the entire part and to improve productivity by rotating both of a substrate and a rotary stamper while crushing a UV curing resin by bringing the substrate and the rotary stampe...
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JPH0973672A |
To make it possible to improve the accuracy of a spacer layer by supplying a UV curing resin between a rotary stamper and a first reflection layer and rotating a substrate and the rotary stamper at the time of crushing this resin between...
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JPH0973669A |
To make it possible to form a spacer layer having excellent productivity by supplying a UV curing resin between a rotary stamper arranged to face the first reflection surface on a substrate and a first reflection layer and rotating the s...
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JPH0919952A |
To prevent the defective peeling and transfer at demolding when an optical disk substrate is molded by an injection-compression molding method. A movable mold 2 is moved toward a fixed mold 1, after a cavity, which was formed by closing ...
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JPH0922545A |
To obtain a method for manufacturing a substrate for an optical recording medium which is small in optical anisotropy and does not generate streaky defects. A fused resin 13, heated and fused via an extruding machine 11 from a die 12, is...
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JP2571968B2 |
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