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JP03036022 |
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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JP03032824 |
PURPOSE: To prevent dust from adhering to the surface of a board due to generation of flashes by reducing an exchange of stampers, by a method wherein an uneven pattern is transferred to ultraviolet curing resin by making use of a roll-l...
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JP03032825 |
PURPOSE: To reduce drastically breaking of a pit form, by futher thinning a board thickness of a mother stamper respectively than those of a master stamper and stampers. CONSTITUTION: A master stamper 8 is electroformed by making use of ...
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JP03030134 |
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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JP03029134 |
PURPOSE: To simplify the process for production by obviating the generation of bubbles in a photopolymer used for reproducing a stamper surface on which ruggedness for information recording is formed. CONSTITUTION: The stamper surface 7 ...
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JP03026532 |
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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JP03026373 |
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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JP03025724 |
PURPOSE: To improve the slipperiness, wear resistance and scratching resistance of a magnetic disk and to improve electromagnetic characteristics by using a polyester film which contains Al2O3 particles of a specific grain size at spe ci...
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JP03022230 |
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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JP03019154 |
PURPOSE: To manufacture a stamper in a short process and to obtain the stamper which is advantageous in yield and cost by forming a diamond-like carbon layer on a Ni sheet having a minute pattern. CONSTITUTION: The diamond-like carbon fi...
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JP03019152 |
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 l...
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JP03016720 |
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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JP03016709 |
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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JP03013322 |
PURPOSE: To prevent the contamination of air bubbles, and continuously produce a substrate having no defect and with excellent adhesiveness by bringing both first and second ultraviolet ray curing resin into contact with each other in an...
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JP03012837 |
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 substr...
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JP03012039 |
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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JP03009835 |
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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JP03008145 |
PURPOSE: To produce the high-quality stamper having less defects by peeling a mother from a master, then subjecting the mother surface to a hydrophilic treatment, peeling the son from the mother and subjecting the son surface to the hydr...
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JP03008144 |
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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JP03004010 |
PURPOSE: To improve workability for positioning-pin fixing mechanism such as in a slide table by providing a tap adaptor with a fitting hole for a positioning pin, a locking means for the inserted positioning pin and an unlocking means. ...
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JP03003132 |
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 m...
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JP02310027 |
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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JP02310016 |
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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JP02307736 |
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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JP02307737 |
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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JP02305628 |
PURPOSE: To bring a stamper to the close contact state with the surface of a die certainly and easily by inserting an inner peripheral holder in the die to thread the male screw part on the other end side of said holder with the female s...
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JP02305629 |
PURPOSE: To simplify a working process and to extend the life of a stamper by a method wherein one surface of a substrate formed into a disc shape from a metal material is polished into a mirror surface state to be coated with a resist a...
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JP02305630 |
PURPOSE: To simplify a manufacturing process and to extend the life of a stamper by a method wherein one surface of a substrate formed into a disc shape from a metal plate is polished into a mirror surface state and an etchable metal fil...
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JP02304742 |
PURPOSE: To obtain an optical disk having small retardation, excellent optical homogeneity and high read-out sensitivity for the information recorded therein by using a specified polycarbonate resin and/or polyformal resin as a substrate...
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JP02304745 |
PURPOSE: To form pits having enough depth and side walls perpendicular to the master disk and to suppress roughening of the surface of the master disk by removing photoresist by etching with an ion beam almost perpendicular to the disk a...
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JP02304741 |
PURPOSE: To obtain an optical disk having small retardation, excellent optical homogeneity and high read-out sensitivity for the information recorded therein by using a specified polycarbonate resin and/or polyformal resin as a substrate...
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JP02304746 |
PURPOSE: To priorly elute such a component in photoresist which can not be removed by oxygen ashing, by washing the photoresist with an org. solvent before oxygen ashing. CONSTITUTION: A master disk 1 having a fine structure on its surfa...
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JP02304744 |
PURPOSE: To reduce times of changing roll stampers in a continuous production process of substrate having guide grooves comprising UV-curing resin by transferring surface patterns of a stamper to UV-curing resin provided on the substrate...
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JP02303819 |
PURPOSE: To enhance the manufacturing yield of a stamper while eliminating bulging and delamination at the time of electroforming by irradiating a photosensitive resin layer with light after the developing process of said resin layer. CO...
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JP02303820 |
PURPOSE: To enhance not only the durability of a mother a stamper matrix but also the transfer properties thereof by forming a film having a homogenous fine structure by a membrane forming means when the first metal membrane is formed on...
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JP02302944 |
PURPOSE: To prevent the drastic change of a substrate shape by receiving the influence of temp., humidity, etc., by forming precoated adhesive layers on the surfaces of the substrate consisting of a glass member and applying a UV curing ...
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JP02301421 |
PURPOSE: To facilitate the separation of a substrate, on both the front and rear sides of which diffraction gratings are reproduced, by a method wherein the edge face of the substrate and the inclined plane of a flat plate, both of which...
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JP02301423 |
PURPOSE: To prevent the positional shifting of a substrate to a stamper from occurring at the pressing with a pressure roller by a method wherein a substrate feeding mechanism, which places the substrate on the stamper held on a stamper ...
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JP02301036 |
PURPOSE: To surely eliminate the waving, warpage, etc., of a substrate surface by heating the substrate, pressurizing the substrate by flat members from both sides, after substrate molding, and cooling the substrate while correcting the ...
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JP02301422 |
PURPOSE: To improve the positioning accuracies of a stamper and of a substrate and prevent the wear of the stamper and pulverized powders from generating by a method wherein the substrate is positioned by fitting the center hole of the s...
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JP02299825 |
PURPOSE: To facilitate exchange of an upper plate and a stamper, and improve the general purposing use by providing an electromagnetic plate attached on a base table and the upper plate to be electromagnetically attracted onto the electr...
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JP02295726 |
PURPOSE: To operate a stamper plate inner periphery press cylinder on one side and to reduce the load of a worker to a large extent by a method wherein the stamper plate inner periphery press cylinder is engaged with a stamper plate inne...
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JP02295725 |
PURPOSE: To perform the mounting and detachment of a stamper plate without detaching the same from an injection molding apparatus and to reduce the load of a worker by operating a clamping means on a fixed side and a clamping means on a ...
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JP02292029 |
PURPOSE: To curve a stamper, and separate a disc substrate from the stamper by constituting a resin layer on the disc substrate of an elastic material flexible enough to separate itself from the stamper part. CONSTITUTION: A glass plate ...
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JP02292028 |
PURPOSE: To obtain an optical disc stamper having a high mold releasing property and excellent durability by forming an inorganic thin film protecting layer with a high mold releasing property from radiation curing resin on a stamper sur...
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JP02289311 |
PURPOSE: To prevent the fringe part of a disc board from generating flashes, by a method wherein prior to or posterior to peeling of the board in a state of a flat plate, to which an already-cured resin film, to which a form of a stampin...
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JP02289336 |
PURPOSE: To duplicate an optical disk of high quality by reducing the generation of resin pieces as low as possible at the time of release by forming a protruding part to at least a part of the outer peripheral edge part of the upper sur...
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JP02283425 |
PURPOSE: To allow a stamper to closely adhere to the surface of a mirror surface roller without causing any gaps therebetween and fix the same to the mirror surface roller by a method wherein the stamper forming recessed and projected pa...
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JP02283424 |
PURPOSE: To allow a stamper to closely adhere to the surface of a roller without causing any gaps therebetween and fix the same or the roller by providing an auxiliary layer made of metal to alloy being a kind different from the material...
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JP02281932 |
PURPOSE: To control generation of unevenness in a development, by a method wherein a far ultraviolet irradiation process of the surface of a glass board is performed as a preprocess of a forming process of a photoresist. CONSTITUTION: We...
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