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WO/2002/045082A1 |
An optical disc for recording/reproducing an information signal by irradiating a disc substrate (1) having an information signal section (1c) on one main surface with a laser beam from the information signal section (1c) side has a clamp...
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WO/2001/063605A1 |
The invention relates to a method for producing a DVD comprised of two DVD substrates A and B. According to the invention, the first substrate (disc A) of the DVD is produced using a first injection aggregate (A), and the second substrat...
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WO/2001/052252A1 |
The invention relates to a method for producing optical storage media, for example of the CD type, in an at least semi-continuous manner. The inventive method comprises the following steps: continuously coating a plastic film strip (2) w...
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WO/2001/049482A2 |
An improved method and apparatus for making a dual-layer DVD disc that does not require a stamping step during its manufacture. A polycarbonate substrate (64) is molded and coated with a semireflective data layer (66). A PMMA substrate (...
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WO/2001/048750A1 |
An optical recording medium which comprises a substrate having a pattern of protrusions and recesses formed in a major surface and on / from which a signal is recorded / reproduced by irradiating the pattern with light. The substrate com...
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WO/2001/015153A1 |
The present invention relates, amongst other things, to a method for forming a single information-carrying medium (12) composed of two first information-carrying media, utilising a first production line or arrangement (A) for producing a...
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WO/2000/077781A1 |
The invention relates to a simple and economical method for coating an optically readable data carrier, whereby a method and a device for coating said data carrier are disclosed. According to said method, a transparent adhesive film, is ...
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WO/2000/077782A1 |
The invention aims to provide a simple and cost-effective method for coating an optically readable data carrier. The invention is characterised in that a transparent adhesive film which has adhesive on one side is applied onto a data car...
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WO/2000/074047A1 |
A substrate (3) coated with photoresist (2) is exposed to light lineally through a lens (1). The portion to be exposed is shifted from the first exposure position (O¿1?) to a position (O¿2?) spaced from the first exposure position (O¿...
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WO/2000/071323A1 |
A system for manufacturing a CD (3) of any shape that is no larger than a standard round CD (2), wherein the specially shaped CD (3) is manufactured using an injection molding process which only requires enough polycarbonate material as ...
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WO/2000/050321A1 |
The invention relates to a device for conveying and simultaneously cooling discoid substrates (5) such as, in particular, injection molded plastic discs for optical data carriers such as a CD, DVD or the like. A so-called walking beam sy...
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WO/2000/029808A1 |
According to the inventive method for determining the thickness of at least one layer provided on a substrate, the measurement can be constructed simply and reliably and a reliable measuring result can be obtained by measuring reflection...
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WO/2000/022619A1 |
An improved substrate and stamper holder and method of forming substrates are disclosed. According to a preferred embodiment of the invention, a substrate for a DVD has a moat (304) with a capillary barrier shape. Under one embodiment, t...
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WO/2000/018531A1 |
A dual-layer DVD disc that does not require a stamping step (typically as part of the 2P prior art manufacturing process) during its manufacture. A polycarbonate substrate (64) is molded and coated with a semireflective data layer (66), ...
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WO/2000/016957A1 |
The invention relates to a shaping tool for the injection molding or injection compression of information carrier disc blanks (11) made of polymethacrylate plastic which is suited as a component of an injection molding or injection compr...
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WO/2000/015420A1 |
The invention relates to a device for transporting circular disk-shaped substrates (1, 1',...) from a feeding station (5) to an end station via several intermediate stations (10, 11, 12, 13), by means of a first revolving table (3) with ...
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WO/2000/005053A1 |
A mold assembly for forming a replica disk in a disk molding process. The replica disk includes a formatted surface on both sides. The mold assembly includes a disk substrate cavity defined by a first block (26) having a first major surf...
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WO/1999/063535A1 |
In a method of manufacturing a matrix for making optical storage media a plate-shaped matrix body is formed. Then a resist coating is applied on one side of the body by spinning a polymer over the body starting from a central portion of ...
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WO/1999/052104A1 |
A method of making a stamper for use in a data storage disk molding process. The method includes making a first stamper including the steps of providing a stamper body having an information layer thereon. The information layer is covered...
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WO/1999/047327A1 |
Processes for producing the multilayered optical recording medium shown in figure 2 using the embossing master (20) shown in figure 3, where an etched metal thin layer (22) has been electroplated with a thick metal layer and the luminesc...
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WO/1999/043490A1 |
The invention relates to a method for gluing two disc elements (10, 12) together, in particular substrates for digital audio, video or data discs, such as Digital Versatile Discs (DVDs). The disc elements (10, 12) are held essentially ho...
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WO/1999/037471A1 |
An injection mould for manufacturing disc-like information carriers comprises: two mould parts (22, 25) mutually movable between a closed and an open position, which mould parts bound in closed position a mould cavity (7) into which in t...
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WO/1999/010153A1 |
A compact apparatus for the production of an optical recording medium by curing a curable resin (102b) between a substrate (101) and a casting mold (103) while reducing the time required for the transfer of the mold which is provided wit...
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WO/1999/003100A1 |
The present invention relates to a method, starting from a micro-structured substrate disc (18) of a first diameter, of manufacturing a master disc unit intended for the manufacture of a disc-shaped matrix of a second, larger diameter fo...
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WO/1998/057806A1 |
Automatic process control of the optical disc (1) bonding process is achieved by tacking the adhesive (27) and deforming the composite prior to final bonding. A separator chuck (21) is used to maintain the separation of the disc halves (...
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WO/1998/057799A1 |
The invention relates to a process for preparing molded discs suitable for use in optical information recording carriers and to the optical information recording carriers thereby obtainable. The process comprises plasticating a homopolym...
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WO/1998/054708A1 |
Substrates to be paired are alternately aligned, one substrate of a pair of substrates adjacent to each other is turned over thereby to be faced to the other substrate, substrates caught in a state faced to each other are sent to a bond ...
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WO/1998/054227A2 |
The invention relates to a device for curing an adhesive by means of UV radiation in an inert-gas atmosphere, which adhesive is interposed as an adhesive layer between two superposed layers of a disc-shaped information carrier (7). The d...
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WO/1998/049681A1 |
A digital versatile disc ('DVD') (20) for storing digital or digitized information that includes two sub-discs. Each sub-disc has an outer peripheral edge (28, 38), a top surface (34, 44), a bottom surface (36, 46), and a bore (30, 40) h...
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WO/1998/049010A2 |
The invention relates to a method for gluing two substrates (3, 6) to a substrate disk (23), wherein an adhesive is applied to the surface of the first substrate (3, 6) which is to be glued and the surface of a second substrate (6, 3) wh...
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WO/1998/047140A1 |
Hubless optical disc having low radial runout. The optical disc (20) is capable of containing a high capacity of information therein. The optical disc includes a disc substrate (24) having a formatted surface (34). A mechanism (32) is pr...
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WO/1998/041984A1 |
A method of production producing with high productivity an information recording carrier having small eccentricity and capable of high density recording, comprising applying a curable resin to an original (1) having a pattern correspondi...
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WO/1998/037556A1 |
In an optical disk stamper manufacturing step, a laser beam reflected at a rear surface of an original glass board results in multi-exposure of photo resist at the time of the laser exposure, causing total exposure and reproduction signa...
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WO/1998/032590A1 |
A method for the replication of diffractive optical elements (32) using audio/video disc manufacturing equipment and processes. The audio/video disc manufacturing process and mold mastering tooling create diffractive optical elements (32...
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WO/1998/027551A1 |
Method for producing a press-form (a stamper) for shaping an information-carrying optical storage medium, wherein in a first step, tracks are burned into the covering layer-coated (5) surface (3) of a blank (1) by a laser beam (6) accord...
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WO/1998/009806A1 |
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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WO/1998/009282A1 |
A method of copying a relief structure (9) from the external surface (5) of a first cylindrical drum (1) to the external surface (25) of a second cylindrical drum (21), comprising the following steps: a) placing the first drum (1) within...
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WO/1998/002875A1 |
An optical disc exhibiting high mass-producibility and being excellent in optical characteristics, mechanical accuracy and mechanical strengths; and a process for producing the disc simply and efficiently. This disc is constituted of a b...
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WO/1997/041557A1 |
Process for producing a disc-shaped information carrier (10), such as a CD or DVD, provided with a central opening and optically readable information which is arranged (can be arranged) around this opening. This information carrier is bu...
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WO/1997/040494A1 |
An adhesive layer (AS) is formed between a first substrate (6) and a second substrate (9) and the first substrate (6) and the second substrate (9) are joined to manufacture a disc (OD). Various conditions such as the temperature (T) are ...
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WO/1997/039449A1 |
A device for carrying out a plurality of successive treatments of a disc-shaped substrate, such as with a disc-shaped information carrier, comprising a plurality of module-shaped treating stations which are removably put together in a cl...
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WO/1997/037348A1 |
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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WO/1997/036737A1 |
The invention relates to a method and a device for glueing together two disc elements (12, 14). The two disc elements are brought together coaxially against each other to form a gap (46) between the disc elements. In an inner area of the...
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WO/1997/035720A1 |
A method for laminating boards includes placing boards (10) with a narrow gap (H) therebetween, inserting an adhesive injection nozzle (32) into the gap, discharging adhesive (40) from the nozzle into the gap so that the discharged adhes...
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WO/1997/027584A2 |
A method and apparatus forming a micro-relief pattern on a surface of an optical disc, which micro-relief pattern may form a holographic image in which a shim bearing a micro-relief pattern is pressed onto the surface of the disc and the...
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WO/1997/026120A1 |
A novel apparatus and a novel method for manufacturing an endless rubber track for large vehicles such as tractors or earth moving machines. A plurality of sprocket-engaging core bar inserts (60) are disposed in the inner portion or inne...
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WO/1997/005608A1 |
Method of making an optical information record. A substrate (44) having a surface (46) for carrying an information bearing layer is provided. A curable polymer (40) is provided on said surface of the substrate. A flexible stamper (20) is...
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WO/1996/036046A1 |
An optical disk of high density and high quality, which is compatible with conventional disks. This optical disk includes a disk-like substrate made mainly of a cyclolefin polymer coated with a photosetting resin layer provided with prot...
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WO/1996/013834A1 |
An optical information recording medium which has a reflecting layer for optically reading information signals. The medium is composed of a plastic substrate. The substrate is colored with a dye so that the kind of information recorded o...
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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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