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JP2001134990A |
To obtain an optical recording disk having good quality in which the inner peripheral edge of a hardened resin shows a beautiful concentric profile even when both of circular substrates have variance in wettability for a UV-curing resin,...
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JP3158394B2 |
PURPOSE: To provide a mold capable of taper-forming a center hole of a substrate for magneto-optical mini disks (MD-MO). CONSTITUTION: A cavity 23 of a form of a substrate 20 and a gate 63 of a ring form opened to a position correspondin...
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JP2001505349A |
A device cures an adhesive by means of UV radiation in an inert-gas atmosphere. The adhesive is interposed as an adhesive layer between two superposed layers of a disc-shaped information carrier. The device includes a UV source, a suppli...
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JP2001052384A |
To surely and uniformly bond substrates by placing a quartz or glass plate on a substrate disk while being dried, and cooling the plate before placed on a next substrate disk after the drying process in which heating is carried out. A bo...
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JP2001052383A |
To surely and uniformly bond substrates by making an inner grip and an outer grip relatively movable when a far region of one substrate is bent in a direction to separate from the other substrate. A bending apparatus 40 has an inner grip...
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JP2001038816A |
To improve smoothness by heat-treating a disk substrate while it is supported in two or more places excluding the outside end part and inside end part of one main surface of it or in the whole surface excluding the outside end part and i...
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JP3112123B2 |
PURPOSE: To rationalize the producing process by disposing one of the moving passage of a conveying carriage having a plurality of conveying arms perpendicularly to an injection molding machine, crossing the other with a turntable axis, ...
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JP3112543B2 |
A method of manufacturing an object having a surface structure, the method employing pressure members (3,5) which are movable relative to one another and which have facing pressure surfaces (23, 25). A first element (51) and a second ele...
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JP3104699B1 |
A substrate 3 on which a photoresist 2 is coated is exposed to an exposure light along a line through a lens 1. Then, the exposure position is moved from the initial position O1 to the position O2 apart from a distance corresponding to a...
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JP3104198B2 |
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JP2000513654A |
This novel method adheres two substrates (3, 6) together, forming a disc (23). This product is especially a digital video disk (DVD). Adhesive is coated onto a surface of the first substrate (3), and the second substrate (6) is laid upon...
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JP2000268417A |
To make a middle layer uniform in thickness and to enhance reliability in the read of an information signal from a 2nd information recording face by forming the middle layer disposed between two information recording faces with a light t...
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JP3090611B2 |
A method of effectively developing an adhesive (R) in a storage disc (D) and capable of differentiating a suction force applied from a surface of a rotary holding table (X) from a drawing force applied from a boss (1). The method compris...
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JP3072797B2 |
A method for forming a substrate sheet for optical recording media having a preformat on the surface is disclosed. This method has the steps of extruding a melted resin to form a melted resin sheet, pressing the melted resin sheet betwee...
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JP2000507515A |
(57) [Summary] The present invention relates to methods and devices for adhering two disc elements (12, 14) together. The two disc elements are brought together coaxially with each other to form a gap (46) between the disc elements. In t...
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JP2000507734A |
A process for manufacturing an optical data storage disk stamper includes the steps of providing an amorphous electroless nickel substrate including phosphorous in the amount in a range of about 5 to 15 percent by weight having a toughne...
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JP3043966B2 |
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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JP3032587B2 |
Resin, typically polycarbonate is injection molded into a disc substrate under select conditions, for example, at a mold temperature of 100-160 DEG C., an injection velocity of 100-120 g/sec., and a pressure of 10-60 kg/cm2, such that th...
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JP3006199B2 |
In a process for producing optical disks comprising the steps of subjecting the photoresist layer (3) on a substrate (1) formed of silicon, quartz, glass or a metal to light exposure, developing and etching treatments to obtain a stamper...
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JP2995754B2 |
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JP2995755B2 |
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JPH11515130A |
Because of peculiarities of the second layer of the DVD compact disc a Mother is used as a Stamper to replicate the proper pit structure and sequence. This has the advantages of incurring no additional cost at Mastering or Plating other ...
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JPH11514782A |
(57) [Summary] In a method of replicating the embossed structure (9) from the outer surface (5) of the first cylindrical drum (1) to the outer surface (25) of the second cylindrical drum (21): (a) said first drum ( The first in the cylin...
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JP2975588B2 |
An auxiliary device is intended to be added to an injection moulding device for manufacturing disc-like information carriers. The injection moulding device comprises a mould having two mould parts which in a closed situation bound a moul...
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JPH11312337A |
To make scratches, etc., on a disk part inconspicuous by roughening the disk part where defects of an adhesive used for sticking two sheets of disks appear. A DVD is provided with at least one roughened surface of at least one surface of...
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JPH11300842A |
To obtain a transparent substrate for an optical disk excellent in transfer properties. The glass transition temp. of a polycarbonate resin subjected to injection molding in order to form a transparent substrate is 120-142°C and the tra...
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JPH11296904A |
To provide an information recording medium which secures sufficient tilt margin and mechanical strength even if a record density is increased. This information recording medium contains a substrate 1 that has a record plane on which embo...
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JP2956989B2 |
A method for making an optically readable medium containing a relief information track comprising the sequential steps of (a) laminating a dry photohardenable film to a surface of a transparent dimensionally stable substrate; (b) embossi...
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JP2955224B2 |
A prescribed molded substrate is molded out of a melted resin with a stamper having projections for forming pits with the shape of the projections preliminarily set to be greater than the shape of pits of the substrate to be molded. The ...
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JP2949721B2 |
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JPH11224439A |
To improve the recording density of a carrier by laminating two reflecting layers respectively carrying recording information as fine recess/ projections through a transparent layer so as to include silicon in one of the reflecting layer...
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JPH11203724A |
To provide an optical disk which has a light transparent layer suppressing the generation of build-up parts in an outer peripheral part as much as possible and having a good surface characteristic and is so formed as to allow a further i...
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JP2909724B2 |
IN ADVANCE OF CARBON COATING, BY INJECTING IONS INTO THE SHAPED SURFACE OF A METALLIC MOLD MADE OF SUPER-HARD MATERIALS, IT BECOMES POSSIBLE TO INCREASE THE ADHESIVENESS OF THE CARBON COAT ONTO THE MOLD MATERIAL, AND TO INCREASE THE LIFE...
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JPH11166113A |
To provide a polycarbonate material for an optical disk substrate having an excellent transferring property, moldability, impact resistance, transparency, productivity and a decreased warpage. A polycarbonate is blended with 200-10,000 p...
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JPH11105148A |
To provide a disc-shaped molded object and to achieve the enhancement of the quality, yield and productivity of a product. Recessed parts 213 are provided to the peripheral surface 212 of the opening part 211 provided to the central part...
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JPH1186353A |
To prohibit the occurrence of warpage by residual stresses at the time of forming an optical disk by forming the embossements corresponding to recording signals on the one surface of a molded disk substrate and forming dummy embossments ...
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JP2862290B2 |
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JPH11501434A |
A process for manufacturing an optical data storage disk stamper includes the steps of providing a chemically vapor-deposited, silicon carbide substrate having a toughness of about 4.5 MPa 2ROOT m, a roughness of about 1 nm, and a flatne...
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JP2847196B2 |
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JP2844667B2 |
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JP2841188B2 |
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JPH10315345A |
To provide a method for manufacturing an optical information recording medium disc with a low bit error rate by optimizing a step to manufacture the medium disc using a substrate of a cyclic olefin resin. A specified part of the surface ...
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JP2828665B2 |
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JP2826728B2 |
PURPOSE:To decrease an initial error rate by coating an adhesive layer on substrates and sticking the substrates to each other in a vacuum atmosphere. CONSTITUTION:An optical recording medium having the tight sticking structure in which ...
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JP2822251B2 |
A disc base plate transfer device for duplication of the disc base plate (7) by transferring a pattern of projections and recesses on a stamper (10) onto a layer of a photopolymerization curable synthetic resin provided on a disc base pl...
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JPH10275362A |
To provide an optical stuck disk in which film thicknesses of adhesive layers can easily uniformized and stuck disks having uniform adhesive layers can be stably provided in large quantity. When this disk is constituted so that two sheet...
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JPH10261246A |
To produce an information recording carrier whose eccentric quantity is small with high productivity by allowing a process providing a projection on the master disk of the information recording carrier to be included in the manufacturing...
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JP2800274B2 |
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JP2799157B2 |
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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JP2790648B2 |
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