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JPH02305629A |
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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JPH02305630A |
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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JPH02305628A |
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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JPH02304741A |
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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JPH02304746A |
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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JPH02304742A |
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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JPH02303819A |
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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JPH02303820A |
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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JPH02301036A |
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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JPH0259044B2 |
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JPH02292029A |
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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JPH02292028A |
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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JPH02289336A |
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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JPH02289311A |
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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JPH0254207B2 |
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JPH02281932A |
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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JPH0252331B2 |
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JPH02270540A |
PURPOSE: To produce highly reliable grating and obviate the cutting process of substrate by a method wherein grating is reproduced on the surface of the substrate by separating the substrate from a stamper by pushing up a projected part,...
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JPH02269030A |
PURPOSE: To enhance productivity by mounting a center positioning member to the inner diameter part of the surface opposite to the groove forming surface of a stamper and subsequently bonding the stamper and a lining reinforcing member. ...
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JPH0246366B2 |
In a method of forming a video disc or a digital sound recording disc for example, a uniform layer of a predetermined thickness has to be applied to a substrate, and according to the invention, the layer material is applied in the form o...
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JPH02124135U |
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JPH02253931A |
PURPOSE: To enable reproduction of a high-quality optical disc by preventing missing of a pit, by a method wherein at the time of peeling of a mother and the sun respectively from a master and the mother, they are peeled off vertically r...
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JPH0245702B2 |
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JPH02251422A |
PURPOSE: To reduce the strain and double refraction of a sheet and to well transfer the unevenness of a stamper by holding the introducing part of the sheet of the last third roller to high temp. while holding the leading-out part of the...
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JPH0245265B2 |
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JPH02249632A |
PURPOSE: To manufacture a stamper for an optical disk of high accuracy and super durability by forming a bonding property increasing layer on a base, and then forming an etching layer. CONSTITUTION: A bonding property increasing layer 2 ...
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JPH02249154A |
PURPOSE: To shorten a time required for a peeling process by forming a metallic thin film only on a pre-group forming area on an optical disk. CONSTITUTION: An optical master disk 23a is manufactured by forming a Cr metallic film 12 on a...
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JPH02247841A |
PURPOSE: To reduce the error rate by constituting a resin composition cured with ionizing radiation of an ionizing ray-curing resin having high polarity and low viscosity to obtain good adhesion of a substrate. CONSTITUTION: The specifie...
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JPH02245320A |
PURPOSE: To manufacture stamper rich in economy for optical disc by a method wherein the stamper is produced by the following processes: the formation of photosensitive silicone resin layer on a board, the light irradiation over the resi...
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JPH02245322A |
PURPOSE: To produce a simple stamper and thereby, manufacture an economical and highly accurate optical disc board by a method wherein the simple stamper is produced in the following processes: the irradiation of laser beams over a board...
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JPH02245319A |
PURPOSE: To manufacture an economical and highly accurate optical disc board by a method wherein the stamper for optical disc is produced by the following processes: the lamination of silicone-based negative resist, thin film and positiv...
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JPH02245321A |
PURPOSE: To contrive to improve the accuracy of pattern produced by etching glass board by a method wherein the production of pattern of second resist material layer is performed by using pattern, which is produced by etching first resis...
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JPH02244440A |
PURPOSE: To control the width of broad grooves with high accuracy by adjusting the condensing position of a light beam for exposing so that the light beam exposes a photoresist on a master disk in the position exclusive of a beam west po...
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JPH02241730A |
PURPOSE: To prevent failures due to immersion of polishing liquid in a rear surface polishing process, and enable the yield to be improved by applying a glass substrate having stages in the utmost peripheries in stamper forming surfaces ...
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JPH02235230A |
PURPOSE: To obtain a good observing field by arranging an observing device so as to be directly opposed to an objective lens in the image formation side space of the objective lens in an exposure optical system. CONSTITUTION: The observi...
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JPH02235620A |
PURPOSE: To accurately transfer the pattern of a molding stamper to a substrate by providing the molding stamper to the surface of a roller subjected to mirror surface polishing and satisfying specific relation between the radius of the ...
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JPH02235228A |
PURPOSE: To produce the master plate for optical disk having a large diameter by using a substrate consisting of a glass substrate which is subjected to specular finishing and on which the thin film of alumina is formed to ≤1μm thickn...
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JPH0233293Y2 |
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JPH02218906A |
PURPOSE:To check an optical disc and a stamper by using the same optical system by receiving an electric signal outputted from the optical system, and processing the various measured results of the optical disc and the stamper. CONSTITUT...
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JPH02217234A |
PURPOSE: To produce a roll-type stamper for 2P which is easy to transmit ultraviolet rays and excellent in transferring properties of a group of track in a simple stage at low cost by applying a resist to extremely thin glass transmittin...
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JPH02217233A |
PURPOSE: To produce a roll-type stamper for 2P which is easy to transmit ultraviolet rays and excellent in transferring properties of a group for track in a simple stage at low cost by winding a paper-shaped glass-stamper on the outer ci...
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JPH02210632A |
PURPOSE: To shorten the time for production of a stamper and to necessitate just one time of an electrocasting stage at the time of the production of the stamper by using the reverse patterns of guide grooves and preformat data and using...
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JPH02203443A |
PURPOSE: To finish a stamper to nearly a uniform thickness after electrocasting by forming the outer peripheral end of the glass master disk used in a mastering stage for optical disks as a curved surface. CONSTITUTION: The glass master ...
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JPH02201447A |
PURPOSE: To enhance the yield of development and to improve the performance of a stamper formed by development and that of a substrate or an optical disk by improving the wettability of the surface of a resist with a developer and enabli...
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JPH02196640A |
PURPOSE: To manufacture a stamper for an optical disk of superior precision with high yield and without introducing particularly sophisticated process into the manufacturing method heretofore available by ozone treating a matrix surface ...
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JPH02196641A |
PURPOSE: To prevent a glass matrix surface from becoming polluted with dust or the like, form a photoresist layer of superior bonding properties and manufacturing a tamper for manufacturing an optical disk at high yield by forming a prot...
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JPH02192931A |
PURPOSE: To accurately and easily position a magnet stamper by means of Meissner effect by forming the positioning clamping jig of the stamper of a superconductor, and cooling it with refrigerant such as liquid nitrogen, etc. to a superc...
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JPH0232681B2 |
PURPOSE:To increase both the wear resistance and the fidelity of a disk record, by coating the ultraviolet-ray hardening resin on th surface of the disk record and thus facilitating an easy exfoliation of the record from the stamper duri...
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JPH02185741A |
PURPOSE: To obtain the stamper having good appearance by applying a resist to a prescribed thickness on a glass master disk and exposing the resist with a modulated laser, then putting only the extreme surface layer into the sensitized s...
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JPH02179730A |
PURPOSE: To contrive an improvement in reliability by securing a sufficient flatness of the surface of a stamper even there is a temperature change at the time of use, by a method wherein an adhesive agent whose coefficient of thermal ex...
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