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JP02137141 |
PURPOSE: To improve quality and to attain massive duplication by composing a stamper of a transparent board, which has a fine rugged pattern on a surface, and a metal film formed on the fine rugged pattern side surface of this transparen...
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JP02127030 |
PURPOSE: To reduce the oxidized surface of an original plate of an optical disk to an original metal and thereby to increase smoothness by forming the original plate having a minute structure formed on the surface, by means of precision ...
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JP02122916 |
PURPOSE: To make a mirror roller and stamper to be brought into contact with each other uniformly without any gaps, and enable the replacement of the stamper to be conducted easily by disposing low melting point metal between the stamper...
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JP02118931 |
PURPOSE: To prevent the deterioration in a reproduced signal by directing a face of an optical disk stamper with no signal recorded thereupon downward and using a magnet chuck mechanism so as to attract a face with no signal recorded the...
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JP02106328 |
PURPOSE: To eliminate troubles such as cracks of a thin film layer and a peeling from a board by forming a signal pattern surface with resin having no urethane group, and introducing the urethane group into a boundary with the layer. CON...
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JP02098848 |
PURPOSE: To easily obtain a disk base which has high-accuracy track pitch and a format recording position at low cost by varying the moving speed of a recording head from a moving speed of the recording head found from prescribed track p...
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JP02095813 |
PURPOSE: To obtain a comparatively simple and not expensive device by a structure wherein a matrix made of ultraviolet transmitting material, a pressing means, with which the surface of ultraviolet non-transmitting plastic board material...
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JP02091835 |
PURPOSE: To shorten an injection molding process for a carrier and to prolong a service life of a metallic mold by providing two or more spiral tracks centering prescribed positions on a master disk. CONSTITUTION: In an annular area 6 be...
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JP02076728 |
PURPOSE: To prevent distortion of a base by forming an inserting signal recording guide channel by a flat sheet stamper and rollers while a transparent resin material for the base is delivered continuously in a sheet shape by a molding m...
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JP02069224 |
PURPOSE: To enable photosetting resin to be spread in a short time and to eliminate the need for making a base plate, a stamper mold and a peripheral jig heat resistant by irradiating photosetting resin with specified electromagnetic wav...
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JP02064941 |
PURPOSE: To obtain the thickness of the optical master disk with good accuracy by providing a recess of the same thickness as the thickness required after the optical master disk is polished to a substrate to be stuck with the optical ma...
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JP02061837 |
PURPOSE: To improve the release property and to prevent the generation of the cloud appearing on the surface of a molded disk by retarding the cooling of the molten resin on the stamper surface. CONSTITUTION: The rear surface of the stam...
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JP02056749 |
PURPOSE: To obtain the disk master plate having guide grooves of high accuracy by providing guide grooves for tracking by photolithography on WC coated with an Ir alloy film, cemented carbide alloy contg. Cr3C2 or thermet. CONSTITUTION: ...
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JP02011318 |
PURPOSE: To avoid a situation where an information pattern transferred on a base is damaged by projections of a stamper by removing a molding from the stamper while it is adhered on a flat plate and then removing the molding from the fla...
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JP02010536 |
PURPOSE: To manufacture the optical disk substrate having wide grooves easily and accurately by irradiating a photoresist layer formed on a substrate of a resist mother disk with laser light while rotating the disk and then developing th...
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JP01320653 |
PURPOSE: To correspond a molding and production conditions and to more surely administer production by inscribing the intrinsic serial number inscribed by the depth of desired holes or the direction of an arrow to the substrate. CONSTITU...
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JP01312749 |
PURPOSE: To eliminate the influence of heat by irradiation of UV light and to prevent the partial deformation of transferred rugged shapes by the distortion in a transverse direction by preheating a metallic mold for reproduction and a r...
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JP01311437 |
PURPOSE: To obtain high reliability by consisting the above process of a 1st stage of a peeling a disk for reproduction of an information recording surface and a substrate, a 2nd stage of forming a thin film layer for recording and a 3rd...
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JP01311436 |
PURPOSE: To increase the yield of production to 100% by pressurizing the center of a glass disk via a spacer and executing pressure reduction while a transfer mold and the glass substrate are held non-parallel with each other to remove a...
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JP01308617 |
PURPOSE: To shorten the production time by irradiating a composition forwarded with the revolution of an embossing roll with light, curing the composition, punching the composition to a specified shape, evaporating a metal on the irregul...
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JP01294242 |
PURPOSE: To assure the adhesive region where two sheets of substrates are adhered and stuck by a UV curing resin or the like by masking a magnetic material to the part of a disk-shaped transparent substrate exclusive of the recording sur...
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JP01291926 |
PURPOSE: To enhance productivity and reliability of a disc by keeping an area surrounding a pressure fixed surface of a disc stamper coated with photo-setting resin and a base in the vacuum state. CONSTITUTION: A base 3 is retained in a ...
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JP01285333 |
PURPOSE: To improve the wettability of a substrate when a recording layer is formed by applying an org. dye solution and to reduce the adhesion of dust and foreign matter due to electrostatic attraction, by molding a resin using a mold h...
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JP01275126 |
PURPOSE: To compact a stamper washer by incorporating a sink and a working bench into a frame body, providing the sink with a pure-water supply means, the bench with a drying means with an air filter and an arbitrary position with the in...
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JP01264820 |
PURPOSE: To prevent deterioration of transfer properties by a method wherein the inside of a movable mold is made a mirror surface and the inside of a stationary mold is fitted with a stamper to transfer information bits to a molded disc...
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JP01264816 |
PURPOSE: To prevent deterioration of transfer properties ascribable to a flow phenomenon of a pit, by a method wherein the surface set with a format signal on a stamper side and/or a guide groove and the surface on the opposite side of t...
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JP01264822 |
PURPOSE: To prevent deterioration of transfer properties ascribable to a flow phenomenon of a pit, by a method wherein at the time of release of a molded optical disc board, priority is given to that of the surface of a split mold corres...
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JP01264639 |
PURPOSE: To facilitate the administration of the optical disk in the production process from injection molding to packing by putting a mark for title identification to a specific region in the non-recording area where information is not ...
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JP01242238 |
PURPOSE: To obtain a highly reliable stamper, by recording a guide groove or data on the surface of the stamper and radially providing a large number of streaks to the rear thereof from the center of the stamper to the peripheral edge th...
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JP01235628 |
PURPOSE: To remarkably improve productivity and efficiently cope with multikind and small quantity demand by a method wherein serial cure inhibitive photosensitive composition is partially cured by exposing to light and, after that, irra...
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JP01211342 |
PURPOSE: To improve the fitting accuracy of a center hub to a disk substrate by firmly forming a photopolymer layer to which a track pattern is transferred on the disk substrate and, at the same time, by fixing the center hub to the disk...
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JP01188332 |
PURPOSE: To enable manufacture of an information record carrier which is free from facial deflection and distortion and has favorable S/N, by forming a material of a stamper as glass. CONSTITUTION: A negative type photoresist 8 is applie...
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JP01180328 |
PURPOSE: To obtain a high quality optical disc, by synchronizing the rotation of a pressing roller with the pressing operation of a substrate mounted on a stamper, and pressing said substrate by a predetermined area of the pressing surfa...
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JP01176518 |
PURPOSE: To prevent a pressure roller from getting stained by resin and manufacture information recording mediums efficiently by providing a recessed section on a pressure roller to correspond with an open section of a base and moving th...
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JP01163049 |
PURPOSE: To obtain a disk without using a disc base plate, by a method wherein an upper mold composed of a transparent plate and a stamper stand having a resin outflow port provided to the upper surface thereof are arranged in opposed re...
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JP01159225 |
PURPOSE: To enable uniform mold release by preventing a deformation of a molded product by a method wherein the central part and a circumferential part of a record carrier after molding are separated from a stamper by ejecting them simul...
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JP01152044 |
PURPOSE: To enable transfer duplication of a desired fine pattern to be performed efficiently and with high accuracy, by conducting by a continuous take-up system a series of steps of supplying a flexible base material and a resin, trans...
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JP01150529 |
PURPOSE: To obtain an optical recording medium with an adhesive layer excellent in adhesive strength, water-proofness and moisture resistance and a substrate layer excellent in dimensional stability even in high-temperature and high-humi...
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JP01146715 |
PURPOSE: To make the shape of a cut section of a central hole better and prevent a resin material from overflowing to a sprue side through a gate by providing a projection mechanism to project a sprue bush to a cavity side according to t...
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JP01141017 |
PURPOSE: To obtain a disc base having excellent quality, by setting a mirror plate of a fixed mold being movable between a molding position regulating the thickness of a disc base and a retreating position to a mold main body under the c...
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JP01141725 |
PURPOSE: To strongly bond ultraviolet-curing resin onto a board by a method wherein the surface of the epoxy board for optical disc is pre-treated with specified silane compound and, after that, coated with the ultraviolet-curing resin. ...
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JP01127324 |
PURPOSE: To improve adhesion of ultraviolet-curing resin to a board, by a method wherein a matter whose surface has been treated beforehand with a vinyl chloride copolymer containing carboxylic acid is used as an epoxy board. CONSTITUTIO...
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JP01118433 |
PURPOSE: To keep favorable characteristics as optical recording medium even at elevated manufacturing rate and realize its mass-production by a method wherein the manufacturing of the medium is done through the fixation and transferring ...
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JP01115621 |
PURPOSE: To enable mass production by simplifying a reproduction process, by a method wherein the title method is constituted so that an original sheet of a laser disk abuts against a metallic reflection layer of a film for forming the l...
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JP01103430 |
PURPOSE: To perform a large number of times of accurate transfer printing by a method wherein the title stamper is provided with a die base comprised of a metal and a transfer printing plate where it is comprised of a fluorinated synthet...
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JP01101122 |
PURPOSE: To reduce inclusion of bubbles in a photopolymer in a transfer step, and reduce drop-out in reproduction of a signal transfer layer, by a method wherein a moving base wherein a turntable, a center boss and a gas pressure control...
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JP01088941 |
PURPOSE: To mold a sub-substrate fat supporting a magneto-optical recording layer by horizontally mounting a metal mold and allowing a hot liquid plastic material to flow uniformly in a radial direction from the symmetrical axis of the p...
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JP01077511 |
PURPOSE: To obtain the double refraction of almost uniform value throughout the total information holding face of a video disc member by using an annular sprue passage on an intermediate position between a main sprue passage and a video ...
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JP01064834 |
PURPOSE: To mitigate a stress generated upon absorbing moisture, permit the restriction of generation of a crack in a radiation curing resin layer and improve the reliability of the base of a disc, by interposing a stress mitigating laye...
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JP01043830 |
PURPOSE: To obtain a substrate having good warpage by subjecting the substrates for information recording having an air sandwich structure to ultrasonic welding by using a horn and anvil having the steps corresponding to the difference i...
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