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JP09194227 |
To obtain the mold for press forming having improved adhesion of the carbon coating layer to the mold member and an improved service life by performing ion implantation into the forming surface of the mold member to modify the surface la...
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JP09183622 |
To improve the adhesiveness of a carbon coat, mold life, etc., by subjecting the forming surface of a press forming mold made of a sintered hard material to ion implantation to modify the surface layer of the forming surface before subje...
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JP09180271 |
To make it possible to shorten the molding cycle and to easily produce an optical disk having good quality by molding a prescribed molded substrate from molten resin by a stamper set larger in the shape of projections for forming pit tha...
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JP09180251 |
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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JP09174589 |
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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JP09167385 |
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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JP09155986 |
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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JP09150439 |
To facilitate removal of a stamper plate by generating no attracting force between a parmanent magnet of a disc cavity plate on the fixed side and a cavity ring when the cavity ring is at the second angular position and generating an att...
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JP09134545 |
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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JP09115191 |
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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JP09109276 |
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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JP09091770 |
To prevent the formation of burrs at an optical disk substrate by applying force on a stamper from the surface on the side opposite to a rugged pit surface, thereby blanking the center hole of this stamper. The stamper 5 is placed on a s...
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JP09091769 |
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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JP09091765 |
To obtain a process for production suitable for the production of many kinds in small quantities with simple stages by holding radiation curing type resins between the reflection layers of first and second substrates and the reflection l...
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JP09073671 |
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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JP09073672 |
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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JP09073669 |
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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JP09073670 |
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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JP09022545 |
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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JP09019952 |
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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JP09017035 |
PURPOSE: To obtain a composite optical disk structural body with which the formation of clamping areas as display regions without the creation of ruggedness on their surfaces is possible and the display regions are thereby expanded. CONS...
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JP08306067 |
PURPOSE: To obtain a process for producing an optical disk having a multilayered structure formed in such a manner that the occurrence of a deviation in the signal control regions between recording parts is averted. CONSTITUTION: This pr...
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JP08306069 |
PURPOSE: To satisfactorily mass-produce optical disks each having large capacity and excellent in signal quality. CONSTITUTION: Pits or grooves in an optical disk are formed with a photosetting resin 202 on a substrate 203 consisting mai...
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JP08273220 |
To enable easy peel-off of a master from a photoresist layer, by causing a first layer provided on the photoresist to be precipitated from a sputtering target made of an NiV alloy. A first layer is made of a metal covering an embossing s...
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JP08238877 |
To efficiently recycle an old plastic sheet by using a new form capable of biologically separating color information or particularly a plastic capable of recycling by melting. An old plastic sheet which has not been used is suitably mech...
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JP08235644 |
PURPOSE: To obtain a multilayer recording medium in which an intermediate layer is formed simply, in which an irregularity in a thickness can be suppressed and which can be manufactured in a short time and with high accuracy. CONSTITUTIO...
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JP08235649 |
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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JP08224779 |
PURPOSE: To efficiently produce a high quality substrate for a information recording medium by introducing the edge part of a molten resin sheet into groove parts formed on the surfaces of a roll and a roll stamper when a molten resin sh...
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JP08221812 |
To obtain method and device for producing a multilayer optical recording medium comprising a reflective layer and a first recording layer formed on a transparent substrate with at least one resin layer having a second recording layer bei...
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JP08212600 |
PURPOSE: To speed up the production cycle and to improve the production efficiency by executing a forced cooling after formation of metallic films, then forming protective films. CONSTITUTION: Moldings of disks are obtd. integrally with ...
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JP08207161 |
PURPOSE: To peel off an optical disk excellently from a stamper. CONSTITUTION: A fixed specular plate 19 is supported displaceably by a plate displacing mechanism 20 in relation to a movable specular plate 3 to which a stamper 12 is fitt...
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JP08203125 |
PURPOSE: To obtain a laminated optical disk having a high recording density and high transfer rate in which information can be reproduced from plural recording planes by irradiation with beams from one surface without causing reading def...
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JP08180470 |
PURPOSE: To obtain a replica having a high surface precision by employing an original mold and a substrate having respective specific thermal expansion coefficients and thicknesses and canceling the warping of the original mold and the s...
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JP08180473 |
PURPOSE: To prevent the occurrence of the warping caused by the hardening of resin in at least effective area region and to obtain a highly precise stamper master disk by successively reducing the irradiation light quantity of ultraviole...
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JP08171744 |
PURPOSE: To obtain a master stamper disk which is entirely free from air bubble defects on the surface of photosetting (2P) resins and is faithfully transferred with rugged patterns of an original mold by adding an adsorbent to the repli...
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JP08171740 |
PURPOSE: To inexpensively produce an embossed optical card by arranging an embossable resin in an embossed region and a resin suitable as a substrate for an optical card in another region including an optical recording region, respective...
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JP08167178 |
PURPOSE: To provide a master disk for a stamper with a resin surface perfectly free from bubbles and defects and having a rugged pattern faithfully transferred from an original die by carrying out replica forming in a vacuum system after...
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JP08161774 |
PURPOSE: To prevent a 2P resin from generating a lifting or a shrinkage after the 2P resin has been hardened by a method wherein, when a cell is formed via spacer, a filler such as glass beads or the like is filled into its inside space ...
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JP08161776 |
PURPOSE: To lower a stress applied to a substrate when it is stripped and to prevent a crack and a chip in the substrate by a method wherein the surface of a mold which forms grooves in uneven shapes corresponding to guide grooves on an ...
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JP2521849 |
PURPOSE: To attain a good development by measuring and distributing a fixing agent on a substrate surface to prepare the surface while rotating a glass substratd at a relatively low speed and drying the surface by rotating the substrate ...
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JP08124224 |
PURPOSE: To prevent defective reproduction characteristics by preparing a sheet- like translucent board having a thermoplastic resin layer, thermally pressing a stamper against the board thereby transferring the protrusions and recesses ...
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JP08124222 |
PURPOSE: To mass produce an optical disc at low cost by providing a synthetic resin film layer on the surface of a smooth translucent board produced through injection molding including no stamper and forming protrusions and recesses ther...
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JP08124212 |
PURPOSE: To color a plastic board, on which a signal recording part for reading out an information signal optically is formed, such that the type, the use, and the like can be determined instantaneously while sustaining good optical char...
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JP08124223 |
PURPOSE: To attain mass production of an optical disc at low cost by laminating a synthetic resin film on a planar translucent board, making a central hole therein and transferring protrusions and recesses, representative of information,...
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JP08069639 |
PURPOSE: To produce a recording medium with a uniform recording layer by depositing an LB film of an org. material as a recording layer by the Langmuir- Blodgett's(LB) technique on a substrate, peeling the LB film and depositing it on ot...
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JP08063807 |
PURPOSE: To prevent the local abnormality of birefringence by receiving the self-weight of a plastic substrate for optical disc at one point at the time of annealing. CONSTITUTION: A plastic substrate 1 for optical disc is held by a hold...
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JP08036794 |
PURPOSE: To make optical and mechanical characteristics sufficient by a method wherein an index of double refraction compensating the amount of change in the double refraction of a base occurring in each process is given to the base befo...
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JP08034068 |
PURPOSE: To provide the structure of the stamping display part of a disc molded product capable of easily reading characters even when characters are stamped in a state overlapped with an annular groove or a bonding line. CONSTITUTION: A...
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JP08031025 |
PURPOSE: To obtain a process for producing a substrate for optical information recording media which improves transferability of preformat patterns and suppresses double refraction down to a low level and a device therefor. CONSTITUTION:...
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JP08031024 |
PURPOSE: To produce a plastic substrate for a recording medium having improved performance as a recording medium by eliminating warp and wave which are generated at the time of molding. CONSTITUTION: Each molded plastic substrate 1 for a...
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