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| Number | Title | Issue Date |
| 8168094 | Method for manufacturing disc and method for manufacturing stamper A method for manufacturing a disc includes the steps of performing laser exposure of an inorganic resist master on which a photosensitive layer is formed using an inorganic material, which protrudes in an exposed region, and a surface coat layer is formed on the sur... | 05/01/2012 |
| 8097189 | Method for manufacturing optical disc master and method for manufacturing optical disc A method for manufacturing an optical disc master using an existing exposure system, and a method for manufacturing an optical disc having higher recording capacity. The method for manufacturing an optical disc, using a master to produce the optical disc having an i... | 01/17/2012 |
| 8029706 | Vacuum transfer apparatus and method A vacuum transfer apparatus including an auxiliary vacuum chamber and a main vacuum chamber is used for transferring an uneven pattern to a disk substrate with a stamper. The auxiliary vacuum chamber is vacuumized or opened to air because the disk substrate is conve... | 10/04/2011 |
| 7968017 | Stamper for optical disc, method for manufacturing optical disc, and optical disc This invention relates to a stamper for optical disc and a method for manufacturing an optical disc by using this stamper. A photoresist is applied to a substrate (2) and this photoresist is exposed, developed and then transferred to form a disc master which ... | 06/28/2011 |
| 7938990 | Pattern drawing method, method of manufacturing a master disk for manufacturing information recording media, and method of manufacturing an information recording medium A pattern drawing apparatus which is capable of reducing manufacturing costs of information recording media. A partial drawing process is executed in response to output of a reference signal, for drawing, after being on standby for a predetermined standby time perio... | 05/10/2011 |
| 7914711 | Use of mother stamper for optical disk molding Optical disks are formed using mother stampers having a spiral groove and/or a spiral pattern of pits corresponding to the pattern from an original laser cut. The mother stamper is the mirror image of the corresponding father stamper. Injection molding of polycarbon... | 03/29/2011 |
| 7862750 | Apparatus and method for producing optical data carriers A device and a method are disclosed for producing an optical data medium, in particular high density optical media, such as the recently developed BlueRay™ disk for illumination with a blue laser (λ≈405 nm). The required thickness of the data and/or protective ... | 01/04/2011 |
| 7824584 | Method of manufacturing stamper, method of manufacturing resin molded article, and stamper A stamper manufacturing method comprises: forming a stamper body so as to have a concave/convex pattern on one surface and a crystalline structure on at least a side toward the other surface; forming a layer having an amorphous structure on the other surface side of... | 11/02/2010 |
| 7767117 | Manufacturing method of a flexible optical disk A flexible optical disk, includes a disk substrate, wherein a rigidity of the disk is equal to or more than 5 Pa and equal to or less than 5000 Pa where the rigidity is defined as Young's modulus of the disk×(thickness of the disk/radius of the disk)3. | 08/03/2010 |
| 7731871 | Optical disk and method for producing the same An optical disk is constructed such that a thin film including a reflective layer is formed on a substrate, or on a thermoplastic resin layer on the substrate. A stamper having an asperity pattern corresponding to information signals is directly pressed against the ... | 06/08/2010 |
| 7727428 | Method for producing optical recording medium A method for producing an optical recording medium, includes: filling a plurality of spaces with a liquid photosensitive material, wherein each of the plurality of spaces is surrounded by a surface of a sheet material and partition walls that are formed on the surfa... | 06/01/2010 |
| 7700011 | Disk forming method A boundary lubricant film 1 is formed on a stamper 22 contact portion of a stationary mirror 21 and/or a stationary mirror 21 contact portion of the stamper 22. The boundary lubricant film 1 contains one of kinds of phosphat... | 04/20/2010 |
| 7670514 | Method of producing optical disk-use original and method of producing optical disk A method for manufacturing an optical disc master using an existing exposure system, and a method for manufacturing an optical disc having higher recording capacity. The method for manufacturing an optical disc, using a master to produce the optical disc having an i... | 03/02/2010 |
| 7641822 | Master information carrier for magnetic transfer and a method for producing the carrier A method of producing a master information carrier by scanning a track a number of times. The method produces a master information carrier has a pattern of a magnetic layer representing information to be transferred to a high-density recording slave medium where the... | 01/05/2010 |
| 7632429 | Method for molding disc substrate Preventing a molded disc substrate from generating a separation pattern. To this end, a molding die 1 includes a pair of stationary die 6 and movable die 7, and an outer circumference ring 16 for molding an outer circumference end of the ... | 12/15/2009 |
| 7625506 | Optical recording medium producing method, and optical recording medium producing device When manufacturing an optical recording medium by forming a resin layer on a surface of a substrate and then forming a center hole that passes through the substrate and the resin layer, a method of manufacturing an optical recording medium according to the present i... | 12/01/2009 |
| 7488436 | Optical disk and method for producing the same An optical disk is constructed such that a thin film including a reflective layer is formed on a substrate, or on a thermoplastic resin layer on the substrate. A stamper having an asperity pattern corresponding to information signals is directly pressed against the ... | 02/10/2009 |
| 7410591 | Method and system for making a nano-plate for imprint lithography Provided is a method and system for manufacturing a nano-plate. The method includes depositing two or more types of film around a central core to form a plurality of film layers, each film layer being of a different type than its adjacent layers. Next, the deposited... | 08/12/2008 |
| 7367773 | Apparatus for combining or separating disk pairs simultaneously Various methods and apparatus are provided for merging and demerging pairs of disks. In one embodiment, pairs of merged disks are first separated and then transferred to separate cassettes such that all of the disks in the separate cassettes are oriented in the same... | 05/06/2008 |
| 7368222 | Optical data storage media with enhanced contrast Disclosed is an optical data storage medium with enhanced contrast. The optical data storage medium includes a substrate having oppositely facing first and second surfaces. A first metal/alloy layer is formed overlaying the first surface of the substrate. The first ... | 05/06/2008 |
| 7362692 | Method and system of mass producing double-sided optical discs Double-sided optical discs, such as a DVD-18 disc, are mass produced with data tracks on each layer. The tracks on one side of the discs are oriented along one spiral while the tracks on the other side are oriented along a different spiral, the two spirals being ori... | 04/22/2008 |
| 7357075 | Laser-supported reproduction method The invention concerns an apparatus and a process for producing a marking on a substrate. Substrates marked in that way are applied to documents such as for example credit cards, personal identity cards or banknotes as security features for affording protection from... | 04/15/2008 |
| 7347959 | Information recording medium and method of manufacturing same Two substrates are simultaneously produced by an injection molding apparatus, and the injection-molded substrates are alternately arranged and cooled by a cooling apparatus. The cooling apparatus has a feed screw mechanism for feeding the alternately arranged substr... | 03/25/2008 |
| 7342254 | Light-emitting device having a diffractive film on its light-output face and manufacturing method therefor Affords efficiently and at low cost practical, tiny light-emitting devices having an optically diffractive film on their light-output face. A light-emitting device (LD) includes a diffractive film (DF) formed on its light-output face; the diffractive film includes a... | 03/11/2008 |
| 7341441 | Nanoprint equipment and method of making fine structure Provided is a nanoprint apparatus in which a substrate and a mold formed on its surface with fine concavities and convexities are heated and pressed with each other through the intermediary of a buffer member interposed therebetwen, including a mechanism for success... | 03/11/2008 |
| 7341771 | Active energy ray curable composition for coating optical disk and optical disk The present invention relates to an active energy ray curable composition for coating optical disc, comprising a urethane (meth)acrylate compound having at least one amide group in the molecule, an ethylenically unsaturated compound other than the urethane (meth)acr... | 03/11/2008 |
| 7334769 | Resin molding machine and member for resin molding machine having film in passive state A member for a resin molding machine wherein it has a face contacting with a molten resin, and at least a part of the face is covered with a film of an oxide of a base material of the face or a component contained in the base material. The use of the member in the m... | 02/26/2008 |
| 7333418 | Shape-limitless optical media The present invention provides a optical media with no shape limitation and, by deposing a position mark in a recording layer and reflection layer, an encryption setup and a special shape can be obtained for more diversification in use. ... | 02/19/2008 |
| 7329114 | Isothermal imprint embossing system Isothermal imprint embossing system. In one embodiment, the system includes a heater to pre-heat a disk substrate to an embossing temperature, a die assembly with an embossing foil to imprint the embossable film disposed on the disk substrate, and a heat tunnel disp... | 02/12/2008 |
| 7322098 | Method of simultaneous two-disk processing of single-sided magnetic recording disks Various methods and apparatus for simultaneously processing two single-sided hard memory disks is provided. Disks are positioned in pairs, with one surface of one disk positioned adjacent one surface of the second disk, with the disk surfaces touching or with a slig... | 01/29/2008 |
| 7323124 | Optical disc cover layer formation method and optical disc cover layer formation device A liquid-form adhesive, which is a raw material of the cover layer, is supplied to a plate surface of the disc substrate, which has been set on a turntable, after which a dummy substrate is set on the disc substrate. The dummy substrate is positioned to be concentri... | 01/29/2008 |
| 7322814 | Film or sheet forming apparatus To form a film or sheet relatively thin and needing a high degree of precision in thickness, such as for an optical use, while suppressing temperature fluctuations at one side opposite to the other side in contact with an outer peripheral surface of a roll (11 | 01/29/2008 |
| 7319644 | Optical head, light-emitting/receiving device, and apparatus for recording/reproducing optical recording/recorded medium An optical head in which focusing error is detected by a spot size method used for recording and/or reproducing information signals on or from an optical disc. The optical head includes a unit for correcting the spot shape between the objective lens and a photodetec... | 01/15/2008 |
| 7311516 | Die for molding disk substrate and method of manufacturing disk substrate 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 the outer periphery thereof. Th... | 12/25/2007 |
| 7303381 | Device for manufacturing optical disc, method of manufacturing the same, and optical disc In an optical disc molding device, a heating medium from a low-temperature controller is made to flow in temperature controlling flow passages (passages 3a) formed at locations corresponding to boundary parts of two fixed molds 7 mounted paralle... | 12/04/2007 |
| 7305690 | Optical information recording medium A disk-shaped optical information recording medium comprising a recording layer, a pressure sensitive adhesive layer or an adhesive layer, and a cover sheet in this order on a substrate, and having a central hole, a track pitch of 300 to 600 nm and a groove depth of... | 12/04/2007 |
| 7300556 | Method for depositing a thin film adhesion layer A method of physical vapor deposition (PVD) is disclosed in which xenon is used as the operating gas in the vacuum chamber in the deposition of an adhesion layer, preferably silicon, which allows the adhesion layer to be ultra-thin with improved durability over prio... | 11/27/2007 |
| 7300609 | Injection-moulding tool for the production of information carriers in disc form An injection-moulding tool for the production of a mould in disc form, in particular in the form of information carriers such as CDs and/or DVDs, wherein the injection-moulding tool comprises a first and a second mirror block, wherein the first and second mirror blo... | 11/27/2007 |
| 7299535 | Methods for making data storage media and the resultant media Methods for forming data storage media and the media formed thereby are disclosed herein. In one embodiment, the method for forming a data storage media, comprises: injection molding a substrate comprising surface features, wherein said surface features have greater... | 11/27/2007 |
| 7294294 | Surface modified stamper for imprint lithography A method of performing imprint lithography of a surface substrate includes a stamper having a thin lubricant coating thereon to facilitate release of the stamper from the imprinted surface to reduce degradation of image replication. Embodiments of the invention incl... | 11/13/2007 |
