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JPS61502787A |
A substrate including a disk (36) having a pair of opposed faces and being coined to provide a sub-micron flatness and smoothness for the disk faces. The coined disk can then be coated with a layer of storage material and used as a stora...
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JPS61242832A |
A process for making at least a single-faced, write and/or read optical disk having a sub-layer with a smooth or high-resolution featured surface and the opaque, substantially flat substrate includes the steps of interjecting between the...
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JPS61235133A |
PURPOSE: To eliminate mixing of bubbles into resin to reduce the generating rate of defects and improve the yield of the information record carrier by a method wherein an electric field is impressed between a stamper and a base plate and...
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JPS61213132A |
PURPOSE: To prevent foams from mixing with molding resin, by a method wherein a stamper and replica substrate are arranged within a vacuum tank in a confronting state with each other, photosetting resin is applied to an information patte...
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JPS61213130A |
PURPOSE: To improve yielding and productivity of products without having mixing of foams within molding resin, by a method wherein a resin leak prevention wall is fitted to a necessary fringe part out of an external and internal fringes ...
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JPS61213131A |
PURPOSE: To improve productivity, by a method wherein photosetting molding resin is applied to a resin pattern molding surface of a stamper under atmospheric pressure and the molding resin is stretched by bonding a replica base to the mo...
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JPS6142612B2 |
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JPS61211023A |
PURPOSE: To reduce eccentricity by a method wherein the inner diameter of a base plate and a pattern on the surface of a stamper are made concentric by pushing the side surface of a central jig, abutting against the inner diameter of the...
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JPS61209139A |
PURPOSE: To prevent a data recording medium base from bending due to moisture absorption by a method wherein ultraviolet ray curing resin layer is formed on both sides of substrate sheet of the data recording medium base. CONSTITUTION: A...
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JPS61209138A |
PURPOSE: To eliminate any unfavorable effect of residual air by a method wherein a stamper pattern formed of specified track guide channel on the back and a patterning channel on the surface is pressure-welded on the surface of a sensiti...
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JPS61209140A |
PURPOSE: To facilitate the release of intermediate product from a copying stencil by a method wherein multiple handle members are bond-erected on the part of ultraviolet ray curing resin jutted out of a substrate sheet using ultraviolet ...
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JPS6141738B2 |
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JPS61206628A |
PURPOSE: To obtain a resin disk, the dimensional change due to temperature of which is small and consequently is applicable to precision machinery field such as high density magnetic disk, optical disk and the like by a structure wherein...
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JPS61203460A |
PURPOSE: To enhance dimensional stability by centrifugally molding a thermoset ting resin to form an insulating support like a seamless belt having a Young's modulus of ≥350kg/mm2, and forming a conductive layer and a dielectric layer....
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JPS61193837A |
PURPOSE: To provide the low cost substrate for an optical disc reduced in optical anisotropy, having high thermal deformation temp. and excellent in stability to temp. and humidity, by injecting a photocurable resin composition based on ...
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JPS6136077B2 |
A method of manufacturing moulds for disc-shaped record carriers, and moulds manufactured by means of such a method. A method of manufacturing moulds for disc-shaped record carriers where a glass plate which contains information and whic...
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JPS6134370B2 |
An injection moulding apparatus for use in producing centrally-apertured video disc records (10). The apparatus includes first and second mould halves (11, 17) reciprocally movable with respect to each other between a closed position, wh...
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JPS61167537A |
PURPOSE: To obtain an information recording disc whose electrically conductive surface layers of both the surfaces are connected with each other, by forming a large diameter hole on a three-layer structural member to be obtained by lamin...
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JPS61168153A |
PURPOSE: To obtain the titled medium having a high quality by providing the performed conductive second plate on at least one side of the first substrate, while forming the first plate to prepare a composite plate and then, by recording ...
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JPS6127815B2 |
The invention relates to a multilayer information disc, in particular a video disc, which is read by laser light. The disc comprises at least two radiation-reflecting optical structures each having a relief-like information track of regi...
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JPS6124167B2 |
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JPS6123085B2 |
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JPS6174423U |
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JPS6195914A |
PURPOSE: To manufacture an optical disc whose bit error rate is little and reliability is high by making content of a foreign matter decrease, by performing injection molding by making use of beady transparent resin as it is without pell...
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JPS6117650B2 |
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JPS6117606B2 |
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JPS6115815B2 |
Information storage mediums such as video discs and digital audio discs are fabricated by extruding a mass of electrically conductive synthetic resin into a block assembly composed of a pair of separable blocks in which the mass is molde...
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JPS6114937B2 |
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JPS6174151A |
PURPOSE: To improve productivity by forming a thin film having recording function on a continuous film made of a plastic or a metal, adhering the film to one side or both sides of a core member, and blanking the core into a prescribed sh...
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JPS618762B2 |
The invention relates to a method of manufacturing a plastic record carrier, in particular a video disc, in which a mold is provided with a fluid molding resin. A substrate is then deformed into a convex shape and pressed against the res...
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JPS6132239A |
PURPOSE: To improve a decrease in yield due to the entrainment of an air bubble and reduce the man power by placing light-setting resin at the center part of a stamper, lowering a transparent substrate which is positioned with columns gr...
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JPS6130692A |
A master suitable for the manufacture of electro-plated negative copies of metal in which the master comprises a preform (1) which on at least one side has a layer (3) of electroplated aluminium the surface of which has a desired profile...
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JPS614644B2 |
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JPS6122913A |
PURPOSE: To reduce the development of error of signal and at the same time enable to mold even by a smaller size pressing machine by a method wherein transparent resin material is kept under vacuum and fused by the radiant heat of an inf...
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JPS60245529A |
PURPOSE: To obtain a formed article excellent in optical properties by sticking a stamper by vacuum suction force or magnetic attraction force closely to a forming die. CONSTITUTION: In the vacuum suction passage 22 provided on a die blo...
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JPS60243838A |
PURPOSE: To perform accurate centering and to produce efficiently a stuck type disk which is less in eccentricity, by centering the disk to specified core materials at the center of a working base body together with an inner peripheral s...
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JPS60229253A |
PURPOSE: To form a disk at a low cost and with good productivity by using one metallic mold, by combining and joining two disks of the same shape having an annular projection which has divided equally the joint surface, so that the proje...
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JPS6049978B2 |
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JPS60212306A |
PURPOSE: To reduce the inner volume made by combining a pair of forces in cooling by a method wherein the holder of each force is prepared by material more excellent in thermal conductivity and large in thermal expansion coefficient than...
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JPS60209139A |
PURPOSE: To conduct an easy-to-handle test of corrosion by heating one side of a test-piece and cooling the other side. CONSTITUTION: The device consists of a heating part and a cooling part and a heating body 7 is placed surrounded with...
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JPS60205844A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS6042529B2 |
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JPS60173742A |
PURPOSE: To attain an excellent airtightness and a strong joining force and to shorten the joining time by providing annular rugged fitting parts on joint surfaces of a spacer and substrates and joining them by an ultrasonic welding meth...
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JPS6036472B2 |
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JPS60155415A |
A process is provided for forming a polymeric layer on a substrate wherein the substrate is held in a mold into which liquid monomer is injected for curing and is released during or before said curing so as to allow it to move to compens...
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JPS60154338A |
A process is provided for forming a polymeric layer on a substrate wherein the substrate is held in a mold into which liquid monomer is injected for curing and is released during or before said curing so as to allow it to move to compens...
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JPS6031569B2 |
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JPS60133556A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS60133555A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS60131657A |
The invention provides a process for manufacturing optical disks by pressing and disks obtained by such a process, for improving the inherent flatness of the optical disk of the thick type, obtained by a process of pressing between a rec...
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