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WO/1996/004652A1 |
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 m, a roughness of about 1 nm, and a flatness of ...
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WO/1995/028705A1 |
A stamper for manufacturing a substrate for an optical disk including grooves of 1.3 'mu'm or less in width and a track pitch of 1.6 'mu'm has a plurality of projections and recesses for forming the grooves. Each of these projections has...
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WO/1994/020288A1 |
The mould according to the invention has the feature that the said end surface is an end surface of a plate with a thickness of at least 0.3 and preferably at least 0.4 mm, which plate consists at least predominantly of a material with h...
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WO/1994/013454A1 |
Optical disks, which require precision replication of the surfaces, are injection molded using molds (4 and 5) with inserts (6) that are heated by circulating heat transfer fluids. By initially heating the inserts (6) with a fluid suppli...
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WO/1994/012390A2 |
A coolable rotor blade (14) is disclosed. Various construction details are developed to decrease tensile stresses in critical regions of the airfoil (20). In one embodiment, the center of gravity of the airfoil sections (28) is shifted f...
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WO/1994/000283A1 |
The invention concerns a device for producing bars (30) from a curable material such as a plastic or a casting resin, the bars being intended in particular for use in the production of buttons. The device is designed essentially in the s...
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WO/1993/024296A1 |
A floor covering is composed of several layers of pieces (6, 7) of thermoplastic foils compacted and at least partially agglomerated by pressure and heat application.
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WO/1993/024308A1 |
A foil-shaped plastic material (2) is composed of pieces or strips (1) of waste thermoplastic foils agglomerated by pressure and heat application.
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WO/1993/024293A1 |
A formed body with agglomerated thermoplastic material, in particular plastic foil material, is composed of plastic and/or plastic foil material pieces (1, 2) and of cellulose-containing pieces or strips (3) mutually linked by pressure a...
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WO/1993/024719A1 |
A cork covering (1, 10), in particular a floor cork covering, has a top cork layer (2, 11) constituted by at least one layer of cork pellets (4) and a support layer (3). The support layer, which is fixedly linked to the top layer (2, 11)...
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WO/1991/011805A1 |
When an uneven pattern of a stamper is to be transferred to a UV-curable resin applied to a disc substrate, the present invention keeps the stamper at a constant temperature where the UV-curable resin has a viscosity suitable for receivi...
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WO/1989/003852A1 |
A self-supporting body of homogeneous hydrophilic polymer, typically a cross-linked acrylic polymer based on 2-hydroxyethyl acrylate, contains water at a concentration of 1 to 20 weight % such that the the body has anti-static properties...
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WO/1988/009990A1 |
An optical storage disk consists of a glass substrate (1) into which guide tracks (3) for servo-controlling the focussed light beams are directly stamped in by hot stamp process. After stamping, the glass substrate is thermally quenched ...
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WO/1988/007924A1 |
The invention concerns a mould insert, in particular for casting and injection moulding machines, made of technical ceramics on an oxide, nitride, carbide or cermet basis or mixtures thereof with a polished scratch-resistant mould surfac...
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WO/1988/003311A1 |
A flexible optical information recording medium consists of a flexible resin layer (110) having formed on its surface a corrugated pattern (111) corresponding to the information to be recorded and a reflection layer (120) which is formed...
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WO/1988/001564A1 |
Two injection presses (1, 2) are connected in series with a metallization installation (16) and two paint tracks (23, 24) by a manipulation and transport system. The unprocessed compact discs (3) made by the two injection presses (1, 2) ...
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WO/1987/002934A1 |
A process for making optical write-and-read recording disk media by applying a thin uniform layer of fluid composition between predetermined inside and outside diameters (34 and 36) of a substantially flat disk substrate (30). A circular...
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WO/1987/002935A1 |
A process for making an optical write-and-read recording disk medium by applying to a substantially flat disk substrate (30) a thin uniform layer of fluid composition between radially inner and outer boundary control rings (34 and 36) th...
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WO/1986/006198A1 |
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 an opaque, substantially flat substrate includes the steps of interjecting between the ...
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WO/1986/000741A1 |
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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WO/1985/003669A1 |
An article of manufacture and method for assisting the lamination of printed circuits in a flat bed press, in which a stratiform sheet (10) has a thermoplastic layer (16), a polymeric release layer on one side (12), a polymeric stabilizi...
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WO/1982/001098A1 |
Most information carrying discs are made by impressing an information carrying surface onto a substrate and subsequently providing a metallic coating over the surface. This requires that disc manufacturers have sophisticated coating equi...
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WO/1981/002236A1 |
The manufacture of information carrying discs (2) has required relatively slow processing because of the need to conform materials to exact mold shapes and to remove entrapped gases. The use of either preformed films or liquids provides ...
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WO/1981/001981A1 |
It has been found that a layered recording disc having an inexpensive core layer and high quality recording groove-accepting outer layers can be made in a relatively simple manner through an application of the technique known as coextrus...
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JP5173420B2 |
A method is disclosed to purify a polymeric material by filtering a melt comprising poly(arylene ether) and poly(alkenyl aromatic) through a melt filtration system. The method provides a filtered polymeric composition having reduced leve...
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JP2012224865A |
To obtain a filtered polymeric composition having a reduced amount of particulate impurities.A method is disclosed to purify a polymeric material by filtering a melt containing poly(arylene ether) and poly(alkenyl aromatic) through a mel...
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JP5065461B2 |
A disc-shaped optical data recording medium has a signal recording layer for reading and/or writing data using light, and a 10 ¼m to 200 ¼m thick transparent protective layer disposed over the signal recording layer. The optical data r...
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JP5032397B2 |
Hollow, cylindrical, seamless metal master for producing seamless diffuser sheets of preselected length and width. Additional aspects of the invention include a hollow cylindrical seamless invertible elastomeric master and method of maki...
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JP4993618B2 |
Hollow, cylindrical, seamless metal master for producing seamless diffuser sheets of preselected length and width. Additional aspects of the invention include a hollow cylindrical seamless invertible elastomeric master and method of maki...
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JP4638918B2 |
A disc-shaped optical data recording medium has a signal recording layer for reading and/or writing data using light, and a 10 ¼m to 200 ¼m thick transparent protective layer disposed over the signal recording layer. The optical data r...
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JP4616341B2 |
An inventive method for producing a disc shaped workpiece comprises the steps of producing a first and a second disc-shaped substrate, applying a first adhesive at least partially onto one of the flat sides of said first substrate, curin...
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JP4338688B2 |
An optical disc manufacturing method suppresses thickness variation in intermediate layers disposed between any two substrates luminated together to achieve an intermediate layer of uniform thickness. In a first step a radiation curable ...
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JP4318992B2 |
To form a disk substrate 42 having a no information area at low cost and without failure, a mold 12 is provided for forming a disk substrate 42 having a no information area 44 . A cavity 32 of the mold 12 has a surface 50 corresponding t...
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JP4286866B2 |
In the described method of producing a plurality of bodies bearing equal imprints of a stamp as optical structures, a stamp ( 13 ) is initially produced, by attaching particles ( 14 ) to a surface ( 15 ) of an auxiliary body ( 16 ); than...
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JP4276116B2 |
The invention relates to a method of manufacturing a multilayer optical disc which is not formed with voids in an optically transparent zone, and a multilayer optical disc. The method of manufacturing a multilayer optical information rec...
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JP4262707B2 |
An optical disc manufacturing method suppresses thickness variation in intermediate layers disposed between any two substrates luminated together to achieve an intermediate layer of uniform thickness. In a first step a radiation curable ...
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JP4248197B2 |
An optical recording medium including a light transmitting layer having a uniform thickness formed on a substrate, in which a burr or stripping hardly occurs at the inner periphery of the light transmitting layer, and a manufacturing met...
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JP4197183B2 |
A die for molding a disk substrate capable of forming fine recessed and projected pits and grooves up to the outer periphery of the disk substrate by preventing low heat conductive elements from peeling off and burrs from occurring on th...
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JP4185140B2 |
The present invention provides an apparatus for optical disc spin-coating that prevents leakage of a photocurable resin due to a capillary phenomenon by controlling a contact area between a cap and a disc so that contamination of the dis...
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JP4180113B2 |
PCT No. PCT/GB97/00204 Sec. 371 Date Mar. 1, 1999 Sec. 102(e) Date Mar. 1, 1999 PCT Filed Jan. 23, 1997 PCT Pub. No. WO97/27584 PCT Pub. Date Jul. 31, 1997A method and apparatus forming a micro-relief pattern on a surface of an optical d...
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JP4139515B2 |
A disc recording medium that is capable of being rotated at a high speed to improve an information transfer rate. The recording medium has a residual stress acting as a tensile force. An annular reinforcing member having a temperature co...
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JP4105513B2 |
There is provided a mold component which makes it possible to mold a substrate for an optical recording medium which enables a functional layer having a uniform thickness to be formed thereon without using a resin-coating assisting membe...
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JP4105217B2 |
A disc-shaped optical data recording medium has a signal recording layer for reading and/or writing data using light, and a 10 ¼m to 200 ¼m thick transparent protective layer disposed over the signal recording layer. The optical data r...
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JP4089383B2 |
A method of producing an information recording medium having enhanced planarity with high productivity, comprising steps of processing a surface of a disk substrate by satin-like finishing, heating and pressing the disk substrate through...
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JP4078678B2 |
PCT No. PCT/JP97/02418 Sec. 371 Date Mar. 9, 1998 Sec. 102(e) Date Mar. 9, 1998 PCT Filed Jul. 11, 1997 PCT Pub. No. WO98/02875 PCT Pub. Date Jan. 22, 1998To provide an optical disk with high mass producibility and excellent optical prop...
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JP4068655B2 |
A disc-shaped optical data recording medium has a signal recording layer for reading and/or writing data using light, and a 10 ¼m to 200 ¼m thick transparent protective layer disposed over the signal recording layer. The optical data r...
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JP4053342B2 |
In an injection molding apparatus 62 on which a disk molding die is mounted, wherein the disk molding die is comprised of a stationary die 10 and a movable die 20, a plurality of principal parts of which are separately temperature contro...
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JP4028850B2 |
The present invention aims at increasing service life of an inner circumferential stamper holder in a die for molding disc substrates that is used when the disc substrates are injection molded. To that end, in the die for molding the dis...
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JP3976655B2 |
There is provided an intermediate for an optical recording medium, which can be uniformly coated with resin by the spin coating method without using a resin coating-assisting member, and allows formation of a central mounting hole withou...
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JP3965336B2 |
To provide techniques for creating molded substrates for use in various different data storage media. The molded substrates have improved thickness distributions that can improve media quality, and in some cases facilitate higher data st...
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