Optical Recording Nonstructural Layered Product Having A Radiation Sensitive Composition Layer Claimed Or Solely Disclosed As Optically Reorderable And Optically Machine Readable Patents (Class 430/270.11)
  • Patent number: 10255938
    Abstract: A magnetic recording medium of the present invention includes a non-magnetic substrate, and a magnetic layer containing a magnetic powder. The magnetic powder is constituted by an ?-iron oxide powder. The magnetic layer has a squareness in a thickness direction of 0.65 or more. In a differential curve obtained by differentiating a hysteresis curve in the thickness direction of the magnetic layer, two or more peaks are present. In a case where, out of peaks in the same direction among the above-described peaks, a local maximum of a largest peak in a magnetic field range of +500 oersted [Oe] or more is taken as P1 and a local maximum of a largest peak in a magnetic field range of ?500 oersted [Oe] or more and less than +500 oersted [Oe] is taken as P2, a relationship below is satisfied: 0.25?P2/P1?0.60.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: April 9, 2019
    Assignee: MAXELL HOLDINGS, LTD.
    Inventors: Toshio Hiroi, Shinji Kawakami, Kenji Tanaka
  • Patent number: 9984714
    Abstract: An apparatus including a heat sink layer and a magnetic recording layer over the heat sink layer. In addition, a thermochromic layer is over the heat sink layer, wherein the thermochromic layer includes a first optical absorbance at a first temperature and a second optical absorbance at a second temperature.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: May 29, 2018
    Assignee: Seagate Technology LLC
    Inventors: Paul M. Jones, Timothy J. Klemmer, Ruoxi Yang, Martin Giles Blaber, Xiaoding Ma, ZhaoHui Fan, Michael J. Stirniman, Yang Yang, XiaoPing Yan, Fujian Huang, Emil John Catoc Esmenda, Emir R. Kazazic, Florin Zavaliche, Hongbo Wang, Huan H. Tang, Kyoumarss Damavandi
  • Patent number: 9956761
    Abstract: An aqueous ink for ink jet containing a self-dispersible pigment, an aromatic sulfinic acid or a salt thereof and an aromatic sulfonic acid or a salt thereof.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: May 1, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshihisa Yamashita, Yuko Negishi, Ryuki Nanamiya, Toshiyuki Umesato
  • Patent number: 9665814
    Abstract: A transaction card having a first layer and a second layer, wherein the first layer is metal and the second layer is carbon.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 30, 2017
    Assignee: Black Card LLC
    Inventor: Scott Alan Blum
  • Patent number: 9483897
    Abstract: A universal escapement is provided that is configured to receive inventory products of different shapes from a dispensing system carrier unit in substantially the same orientation, and to read informational indicia on the inventory product. The escapement includes a slide plate having an integral glass portion, a reader disposed behind the glass portion to read indicia on the inventory products and scan images of the inventory products before labeling, a plurality of imaging devices configured to read informational indicia on the sides and ends of the products, and an imaging device configured to read informational indicia on a label after it is applied to the inventory product. The escapement includes a shuttle assembly having a plurality of imaging devices configured to read information indicia on the bottom of the inventory products. The escapement also includes first and second guide members movably disposed for receiving inventory products of various sizes therebetween.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: November 1, 2016
    Assignee: Tension International, Inc.
    Inventor: Robert Terzini
  • Patent number: 9466019
    Abstract: A transaction card having a first layer and a second layer, wherein the first layer is metal and the second layer is a polymer, polycarbonate, or carbon. The metal layer may be stainless steel plated with gold.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: October 11, 2016
    Assignee: Black Card LLC
    Inventor: Scott Alan Blum
  • Patent number: 8980396
    Abstract: An optical information recording medium 10 includes a plurality of recording layers 14, and intermediate layers 15 each provided between the recording layers 14. The optical information recording medium 10 is configured such that first and second intermediate layers 15A, 15B having different refractive indices are arranged alternately with one recording layer 14 interposed therebetween, that ((n3?n1)/(n3+n1))2?0.001 is satisfied, where n1 represents a refractive index of the recording layer 14, and n3 represents a refractive index of the second intermediate layer 15B, and that when a recording layer 14 is irradiated with a recording beam RB and generates heat by absorption of the recording beam RB, an interface (reflection interface 18A) between the recording layer 14 and the first intermediate layer 15A adjacent to this recording layer 14 undergoes a change of shape to record information (recording spot M).
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: March 17, 2015
    Assignee: FUJIFILM Corporation
    Inventor: Toshiyuki Kitahara
  • Patent number: 8895127
    Abstract: The embodiments disclose a method of creating two-sided template from a single recorded master, including fabricating a first template using a single recorded master, wherein the first template has a changed duty cycle and an unchanged servo arc orientation, creating a replicate of the first template, wherein the replicate has a mirrored servo arc orientation and a changed duty cycle and fabricating a second template using the replicate to produce a predetermined mirrored servo arc orientation and a predetermined duty cycle for imprinting on a second side of a patterned stack.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: November 25, 2014
    Assignee: Seagate Technology LLC
    Inventors: David Kuo, Gennady Gauzner, Kim Yang Lee
  • Patent number: 8889241
    Abstract: A component comprising a stacked interleaved film structure that includes a plurality of layers inert to light. Alternating layers are either doped with a reverse saturable absorber (RSA) material or the RSA material is located between the adjacent inert layers. In some embodiments, the inert alternating layers have different refractive indices. A data storage device and methods of manufacture are also disclosed.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: November 18, 2014
    Assignee: General Electric Company
    Inventors: Eugene Pauling Boden, Xiaolei Shi
  • Patent number: 8784965
    Abstract: The embodiments disclose a method of creating two-sided template from a single recorded master, including fabricating a first template using a single recorded master, wherein the first template has a changed duty cycle and an unchanged servo arc orientation, creating a replicate of the first template, wherein the replicate has a mirrored servo arc orientation and a changed duty cycle and fabricating a second template using the replicate to produce a predetermined mirrored servo arc orientation and a predetermined duty cycle for imprinting on a second side of a patterned stack.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: July 22, 2014
    Assignee: Seagate Technology LLC
    Inventors: David Kuo, Gennady Gauzner, Kim Yang Lee
  • Patent number: 8778476
    Abstract: This invention relates to DVDs made from polycarbonate and a special UV curable bonder material consisting of A) an urethane acrylate oligomer as binder, which is the reaction product of i) one or more polyisocyanates and ii) one or more hydroxyfunctional lactone ester (meth)acrylates having a number average molecular weight of from 200 g/mol to 2000 g/mol and having the formula: CH2?C(R1)—C(O)—O—R2—[O—C(O)—R3]n—OH wherein, n is an integer from 1 to 5, R1 is hydrogen or methyl, R2 represents an alkylene group or substituted alkylene group having from 2 to 10 carbon atoms and R3 represents a straight or branched chain alkylene group of from 3 to 8 carbon atoms, and which may be substituted with one or more alkyl groups having from 1 to 12 carbon atoms, B) a reactive thinner, comprising of mono functional acrylates and/or (meth)acrylates C) a photo initiator and D) optional additives which offers improved performance at high data transfer rates.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: July 15, 2014
    Assignee: Bayer MaterialScience AG
    Inventors: Friedrich-Karl Bruder, Wilfried Haese, Rafael Oser, Wolfgang Fischer, Michael Ludewig, Raymond Wong, Ice Zhang
  • Patent number: 8722168
    Abstract: A data disc, method and apparatus for forming the disc are disclosed. The data disc includes a first substrate structure bonded to a second substrate structure, with two curable material layers disposed on different sides of at least one of the two substrate structures, and at least one groove formed on a surface of one of the two curable material layers.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: May 13, 2014
    Assignee: Thomson Licensing
    Inventors: John Matthew Town, Patrick J. Byrne, Thomas Hartmann, Alan Bruce Hamersley
  • Patent number: 8715804
    Abstract: The present invention is directed to a method for producing a data storage medium on a surface of a substrate for storing data in the form of topographic features. The method comprises a first step wherein a crosslinking agent containing at least three alkyne groups is deposited on the surface of the substrate. In a second step the deposited cross linking agent is cured so as to obtain the data storage medium in the form of a crosslinked polymeric layer on the surface of the substrate. The invention is further directed to a data storage medium obtained by this method and a data storage device comprising this data storage medium.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: May 6, 2014
    Assignee: International Business Machines Corporation
    Inventors: Urs T. Duerig, Bernd W. Gotsmann, Armin W. Knoll, David S. Pires
  • Patent number: 8709569
    Abstract: An optical recording medium includes: a substrate; an information recording layer formed on the substrate for recording and reproducing an information signal by irradiation with light; and a light transmission layer formed on the information recording layer and transmitting the light, the storage elastic modulus of the light transmission layer at ?5° C. being within a range of 1500 MPa or less.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: April 29, 2014
    Assignees: Sony Corporation, Dexerials Corporation
    Inventors: Minoru Kikuchi, Hiroyuki Kawasaki, Takashi Ohgi, Yoshiaki Nakata
  • Patent number: 8709571
    Abstract: This invention relates to an optical recording medium in which at least a recording layer and a light transmitting layer are sequentially formed on a substrate and in which the light is illuminated from the light transmitting layer side for recording and/or reproducing information signals, said substrate comprising an injection molded part, and said substrate having a Young's modulus E of at least 2.15 GPa and a Q factor of lower than 160 measured at 25° C. at 2000 Hz in accordance to ASTM E 756-05 05 and a transcriptability of the pit/groove structure of >85%.
    Type: Grant
    Filed: December 12, 2009
    Date of Patent: April 29, 2014
    Assignee: Bayer MaterialScience AG
    Inventors: Friedrich-Karl Bruder, Wilfried Haese, Rafael Oser, Rainer Protte, Alexander Meyer, Karlheinz Hildenbrand, Raymond Wong, Ice Zhang
  • Patent number: 8673421
    Abstract: A data disc, method and apparatus for forming the disc are disclosed. The data disc includes a first substrate structure bonded to a second substrate structure, with two curable material layers disposed on different sides of at least one of the two substrate structures, and at least one groove formed on a surface of one of the two curable material layers.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: March 18, 2014
    Assignee: Thomson Licensing
    Inventors: John Matthew Town, Patrick J. Byrne, Thomas Hartmann, Alan Bruce Hamersley
  • Patent number: 8663771
    Abstract: An optical storage medium is disclosed that includes an optical disc having layers of graphene on one or both sides of the disc to provide wear protection against scratches and mechanical abrasion. Grahpene is a hard material that is 97.7% optically transparent. Thus, layers of graphene at or near the exterior sides of an optical disc provide wear protection to the optical media from mechanical abrasion and scratches while allowing laser light to pass through the graphene layers to read or write to the optical media.
    Type: Grant
    Filed: May 5, 2013
    Date of Patent: March 4, 2014
    Inventor: Tyson York Winarski
  • Patent number: 8642155
    Abstract: Provided is an information storage medium using nanocrystal particles, a method of manufacturing the information storage medium, and an information storage apparatus including the information storage medium. The information storage medium includes a conductive layer, a first insulating layer formed on the conductive layer, a nanocrystal layer that is formed on the first insulating layer and includes conductive nanocrystal particles that can trap charges, and a second insulating layer formed on the nanocrystal layer.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: February 4, 2014
    Assignee: Seagate Technology LLC
    Inventors: Seung-bum Hong, Simon Buehlmann, Shin-ae Jun, Sung-hoond Choa, Eun-joo Jang, Yong-kwan Kim
  • Patent number: 8632871
    Abstract: A film for producing a sheet for a multilayer optical recording medium, the sheet having a repeating structure containing a plurality of laminated optical recording layers, the sheet has a structure including a unit wherein an optical recording layer and an adhesive layer are laminated or a structure including a unit wherein an optical recording layer, a barrier layer and an adhesive layer are laminated, and a maximum height roughness of the optical recording layer or the barrier layer is 500 nm or smaller, the optical recording layer or the barrier layer is disposed on a process film on a face at a side for forming the optical recording layer or at a side for forming the barrier layer, the face at the side for forming the optical recording layer or at the side for forming the barrier layer having a maximum height roughness of 500 nm or smaller.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: January 21, 2014
    Assignee: Lintec Corporation
    Inventors: Masaharu Ito, Shinichi Hoshi, Ryo Takahashi, Sou Miyata, Tomoo Orui, Takeshi Kondo
  • Patent number: 8623486
    Abstract: A hybrid data disc, method and system of forming the disc are disclosed. The hybrid disc includes a first substrate structure bonded to a second substrate structure, and at least two data layers of different formats for access from different sides of the disc. One example provides the second substrate structure with a second substrate that has at least one curable material layer on each side of the second substrate, and the curable material has a property that results in shrinkage associated with curing of the material. Other examples provide a data disc with different stacking ring configurations, a thinner substrate and substrate structures of opposite curvature.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: January 7, 2014
    Assignee: Thomson Licensing
    Inventors: John Matthew Town, Patrick J. Byrne, Alan Bruce Hamersley
  • Patent number: 8617435
    Abstract: Sol-gel process for producing a photochromic composite material includes successive stages of hydrolysis, condensation, and drying, in which an alkoxysilane is selected as a precursor, and a ruthenium complex with a nitrosyl ligand is selected as a photochromic complex, and, in combination, the sol-gel process is implemented starting from the selected precursor and photochromic complex, with successive stages of hydrolysis, arrangement in a container of a selected shape, condensation, curing and aging, whereby this latter stage includes a final drying cycle, and for, the curing and aging stages, the pH, temperature and duration are selected so that in the produced xerogel, whose shape is determined by that of the container, the photochromic ruthenium complex with a nitrosyl ligand, in the crystalline state and in the form of nanoparticles, is inserted into the nanopores of the silica matrix, distributed in an at least substantially homogeneous way.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: December 31, 2013
    Assignee: Centre National de la Recherche Scientifique-CNRS
    Inventors: Isabelle Malfant, Benoit Cormary, Lydie Valade
  • Patent number: 8609217
    Abstract: An optical recording medium is equipped with a light transmitting layer to have visual effects. Patterns with different visual effects can be printed on the upper and low surfaces of the light transmitting layer. Alternatively, visual effects can be presented by directing light out of an upper light grating from a low printing layer. The optical recording medium can not only record information but also present visual effects.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: December 17, 2013
    Assignee: CMC Magnetics Corporation
    Inventors: Ying-Yen Huang, Yung-Hui Hung, Cheng-Pi Lee
  • Patent number: 8603602
    Abstract: A first substrate is formed to include a surface on which a first record layer is formed, and which includes an inner circumferential portion on which a ring-shaped member is provided. Ultraviolet curing resin is dropped onto part of the surface which is located inward of the ring-shaped member, and the first substrate is then spun to coat the first record layer with the ultraviolet curing resin. Furthermore, a second substrate is formed to include a surface on which a second record layer is formed, and the second substrate is spun to coat the second record layer with ultraviolet curing resin. Then, the first and second record layers are made to face each other, and the first and second substrates are bonded to each other by the ultraviolet curing resin.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: December 10, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Koji Takazawa
  • Patent number: 8580368
    Abstract: An optical information recording medium including three or more information layers, wherein at least one information layer provided on the light incident side is an information layer which enables information to be overwritten and includes a recording film, a transmittance adjusting film of a dielectric containing Bi, Ti and O, and an isolation film in this order from a light incident side; and the isolation film is provided between and adjacent to the transmittance adjusting film and an intermediate separation layer which separate the information layer from another information layer on the side opposite to the light incident side; and the isolation film has an optical constant at a wavelength of 405 nm such that a refractive index is 1.8 or less and an extinction coefficient is 0.05 or less. This information recording medium prevents the repeated overwriting characteristics in a sever environment from being deteriorated.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: November 12, 2013
    Assignee: Panasonic Corporation
    Inventors: Akio Tsuchino, Takashi Nishihara, Hideo Kusada, Rie Kojima, Noboru Yamada
  • Patent number: 8574699
    Abstract: A recording medium includes a substrate having a label-side surface on one side and a recording layer for recording and reproducing information on the other side. The label-side surface of the substrate has a mirror surface portion and a rough surface portion, a step having a step height of 10 ?m or less is formed between the mirror surface portion and the rough surface portion, and an average roughness of the rough surface portion is between 10 ?m and 2 ?m, inclusive. Visible information is formed on the label-side surface by using the mirror surface portion and the rough surface portion.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: November 5, 2013
    Assignee: Sony Corporation
    Inventors: Katsuya Tonosaki, Takeshi Gouko
  • Patent number: 8576681
    Abstract: An optical information recording medium includes a recording layer in which a track is formed, the track having recording marks linearly arranged thereon. Each recording mark has a dimension corresponding to a reference mark length, which serves as a reference, in a track direction along which the track extends, the dimension being smaller than dimensions of the recording mark in two directions perpendicular to the track direction.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: November 5, 2013
    Assignee: Sony Corporation
    Inventors: Goro Fujita, Takashi Iwamura
  • Patent number: 8568851
    Abstract: The method of manufacturing an optical information recording medium includes a first resin applying step of applying a first photo-curing resin to one surface of a first substrate, a first resin curing step of laminating a first stamper having an uneven surface on the first photo-curing resin, and irradiating ultraviolet rays via the first stamper to cure the first photo-curing resin, a second resin applying step of applying a second photo-curing resin to the other surface of the first substrate, a second resin curing step of laminating a second stamper having an uneven surface on the second photo-curing resin, and irradiating ultraviolet rays via the first second to cure the second photo-curing resin, a first stamper peeling step of peeling the second stamper from the second photo-curing resin, and a first recording layer laminating step of laminating a first recording layer on an exposed surface of the second photo-curing resin.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: October 29, 2013
    Assignee: NEC Corporation
    Inventor: Eiji Kariyada
  • Patent number: 8563111
    Abstract: Disclosed is a digital information media having an adhesion promotion layer supported on a dummy (L1) substrate that enables secure bonding of the L1 layer, directly or indirectly, to the rest of the stack of layers in the digital information media. Certain materials including metals, metal alloys, or metalloids enhance adhesion between the adhesive layer and the L1. By applying an adhesion promotion layer of such materials on an inner surface of the L1, the bond between the adhesive and the adhesion promotion layer improves bonding and reduces a tendency for the L1 to delaminate from the rest of the stack. The tendency for breakage of the media at the juncture between the adhesion promotion layer and the adhesive is reduced, and incursion of moisture or oxygen through the interface between the adhesion promotion layer and the adhesive is inhibited.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: October 22, 2013
    Assignee: Brigham Young University
    Inventors: Matthew R. Linford, Christopher M. Miller
  • Patent number: 8563110
    Abstract: Optical information media containing an ultraviolet protection layer are described. The protection layer will reduce or eliminate damage to the media's data layer and substrate.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: October 22, 2013
    Assignee: Brigham Young University
    Inventors: Robert C. Davis, Matthew R. Linford, Barry M. Lunt
  • Patent number: 8541087
    Abstract: A sheet (1) for manufacturing an optical disc which includes a pressure-sensitive adhesive layer (11), having a peak temperature of a loss tangent not higher than ?10° C. and a polar component (?Ps) of the surface energy not smaller than 2.0 mJ/m2, and a protective sheet (12), is laminated on a data recording layer (3) (a laminate formed of a reflecting layer (31), a dielectric layer (32), a phase change layer (33) and a dielectric layer (32?)) that is formed on an optical disc substrate (2). The sheet for manufacturing an optical disk (1) allows obtaining an optical recording medium that is provided with the pressure-sensitive adhesive layer (11) that has high adhesion to the data recording layer (3) and does not peel readily off adjacent layers.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: September 24, 2013
    Assignee: Lintec Corporation
    Inventors: Naoki Taya, Masaharu Ito, Takashi Morioka
  • Patent number: 8541088
    Abstract: The present invention is related to an optical recording media having a printable layer with high specular gloss. The optical recording media comprises a first ink-absorbing layer formed on an outermost layer at an opposite side of a recording/reading surface of the optical recording media; and a second ink-absorbing layer formed on an inner side of the first ink-absorbing layer. A surface of said first ink-absorbing layer is printed with inks of colors of cyan, magenta, yellow, black to have an average specular gloss value at 20 degree angle greater than or equal to 30GU, an average specular gloss value at 60 degree angle of the four colored inks greater than or equal to 70GU, and an average specular value at 85 degree angle of the four colored inks greater than or equal to 88GU.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: September 24, 2013
    Assignee: CMC Magnetics Corporation
    Inventors: Yung-Hui Hung, Cheng-Pi Lee, Kun-Long Li
  • Patent number: 8530025
    Abstract: An optical information recording medium comprises a plurality of recording layers, and intermediate layers provided between the plurality of recording layers. The optical information recording medium has a recess for use in tracking, in a layer which is provided in a position farther, than the plurality of recording layers, from a light-incident side on which a beam emitted for recording/reading enters. A depth D of the recess is ?/4n where ? is a wavelength of the beam emitted for recording/reading, n is a refractive index of a layer with which the recess is filled.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: September 10, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Tatsuo Mikami, Hidehiro Mochizuki
  • Patent number: 8524348
    Abstract: A data storage device includes a substrate layer, made of a moldable non-photopolymer plastic substrate and having a servo layer, adjoined to a stacked film structure that is constructed of multiple functional films, having data layers, with spacer film(s) disposed between each of the functional films. Methods of manufacturing the data storage device include using a roll-to-roll system to adhere thin spacer film extrusions between the multiple functional film extrusions so as to construct the stacked film structure. An additional method uses an application of functional film coating to thin spacer films and a roll-to-roll system.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: September 3, 2013
    Assignee: General Electronics Company
    Inventors: Xiaolei Shi, Peter William Lorraine, Victor Petrovich Ostroverkhov, Ri-an Zhao
  • Patent number: 8524347
    Abstract: Provided is a manufacturing method of an optical information storage medium irradiated with laser beams to optically record or reproduce information. A method of manufacturing an optical information storage medium according to the present invention includes forming asperity patterns for guiding laser beams on both sides of a second substrate 12, forming information recording layers 41 and 42 in the asperity patterns, bonding a first substrate 11 to a surface where one information storage layer 41 is formed in the second substrate 12 with an ultraviolet curable resin 22 formed therebetween, and bonding a third substrate 13 to a surface where another information storage layer 42 is formed in the second substrate 12 with an ultraviolet curable resin 22 formed therebetween.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: September 3, 2013
    Assignee: NEC Corporation
    Inventor: Eiji Kariyada
  • Patent number: 8518515
    Abstract: The multilayer optical recording medium with at least four or more recording and reading layers disposed one above the other has at least two or more recording and reading layer groups each including the recording and reading layers successively disposed one above the other. In adjacent recording and reading layer groups with an intermediate layer interposed therebetween, a recording and reading layer nearest a front side in the recording and reading layer group nearer a back side is higher than the higher value of the reflectances in a stacked state of two recording and reading layers nearest the back side in the recording and reading layer group nearer the front side.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: August 27, 2013
    Assignee: TDK Corporation
    Inventors: Takashi Kikukawa, Motohiro Inoue, Atsuko Kosuda, Tomoki Ushida
  • Patent number: 8518513
    Abstract: The multilayer optical recording medium with six or more recording and reading layers disposed one above the other has at least two or more recording and reading layer groups. The recording and reading layer groups each include a plurality of recording and reading layers successively disposed one above the other. The reflectance of each of the recording and reading layers in a stacked state decreases in the order from a front side near a light incident surface toward a back side far from the light incident surface. A recording and reading layer nearest the front side among the recording and reading layers in the recording and reading layer group nearer the back side has a reflectance in a stacked state higher than that of a recording and reading layer nearest the back side among the recording and reading layers in the recording and reading layer group nearer the front side.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: August 27, 2013
    Assignee: TDK Corporation
    Inventors: Motohiro Inoue, Takashi Kikukawa, Atsuko Kosuda, Tomoki Ushida, Hideki Hirata
  • Patent number: 8518512
    Abstract: A production method for an optical disc master includes the steps of: preparing a substrate; forming an intermediate layer having a predetermined thickness on the substrate; forming an inorganic resist layer having a thickness on the intermediate layer, a ratio of the thickness of the intermediate layer to the thickness of the inorganic resist layer being in a range between 0.8:1 and 1.5:1; irradiating the inorganic resist layer with a laser beam to selectively expose the inorganic resist layer; and developing the selectively exposed inorganic resist layer.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: August 27, 2013
    Assignee: Sony Disc & Digital Solutions Inc.
    Inventors: Tadahisa Aoki, Katsunori Takeuchi
  • Patent number: 8518514
    Abstract: Simple design of a multilayer optical recording medium is achieved while suppressing interlayer crosstalk and confocal crosstalk in the multilayer optical recording medium. Simple recording and reading control by a recording and reading unit is also achieved. The multilayer optical recording medium includes at least three or more recording and reading layers deposited one above the other with intermediate layers interposed therebetween, and information can be read by light irradiation from the layers. The intermediate layers have film thicknesses of two types or less, and all the recording and reading layers except the recording and reading layer farthest from a light incident surface have substantially the same optical constant.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: August 27, 2013
    Assignee: TDK Corporation
    Inventors: Takashi Kikukawa, Motohiro Inoue, Atsuko Kosuda, Tomoki Ushida, Hideki Hirata
  • Patent number: 8481141
    Abstract: A Flexible VCD Having Domed Center and Flat Central Bottom Ring and Method of Making Thereof is disclosed. The disc will has a flat data storage section of its substrate that is less than 0.7 millimeters thick, while the central region of the disc is defined by a dome structure adjacent to the spindle aperture that is of standard digital disc thickness. The disc is thin enough such that its substrate is flexible. The dome structure is shaped to provide the widest compatibility with player/recorders, as well as with disc printing systems. Disc versions are available that provide conical dome structures, as well as slivered dome structures of both conical and rectangular cross-section, and a combined design having a plurality of raised protrusions on the top surface of the disc, and a flat central ring protruding from the bottom surface of the disc. The method for manufacturing the discs simply requires the replacement of the conventional stamper holder with a stamper holding having a non-flat face.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: July 9, 2013
    Inventor: Mohamed Mohab Sabry
  • Patent number: 8475902
    Abstract: A multilayer optical recording medium in which, as a recording layer is located farther from a surface of incidence of a light beam for reading, the amount of light that reaches the surface of incidence after being reflected off the recording layer is smaller.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: July 2, 2013
    Assignee: Pioneer Corporation
    Inventors: Ayumi Mitsumori, Takuma Yanagisawa, Takanobu Higuchi
  • Patent number: 8470427
    Abstract: A method for manufacturing an information recording medium including N information layers, (N?1) intermediate layers interposed between the information layers and a protective layer laminated on the Nth information layer placed on a substrate formed with a first reference point, including: forming the information layer on the substrate; repeating (N?1) times a process of applying radiation curable resin on the information layer, a process of affixing a transfer stamper formed with a second reference point to the radiation curable resin, a process of curing the radiation curable resin by irradiation, and a process of forming the intermediate layer by peeling the transfer stamper at an interface with the radiation curable resin, in order to form the (N?1) information layers and the (N?1) intermediate layers and thereafter form the Nth information layer; and forming the protective layer on the Nth information layer, wherein in the process of affixing the transfer stamper to the radiation curable resin, the trans
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: June 25, 2013
    Assignee: Panasonic Corporation
    Inventors: Masahiko Tsukuda, Morio Tomiyama
  • Patent number: 8455079
    Abstract: The invention relates to three-dimensional optical memory devices and can be used in all areas of computing in which it is necessary to record large data files on compact carriers. The claimed device can also be used for recording, storing and playing back video and audio recordings. A multi-layer optical disc consists of a series of alternating layers of optically transparent materials arranged in groups that comprise a layer of a material with a refraction index n1 enclosed between a layer of a material with a refraction index n2, which satisfies the relationship n2<n1, and a layer of a material with a refraction index n3, which satisfies the relationship |n3-n1|<0.001, wherein the layer with the refraction index n3 contains a photosensitive compound that can exist in two forms characterized by different optical properties.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: June 4, 2013
    Assignee: Everhost Investments Limited
    Inventor: Vadim Veniaminovich Kiyko
  • Patent number: 8445091
    Abstract: An optical disc having at least two metal-containing layers with different compositions and partially overlapping areal extents in the plane of the disc and method of forming the disc are described. The optical disc with dual metallization exhibits visually distinct regions suitable for use for identification purposes.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: May 21, 2013
    Assignee: Thomson Licensing
    Inventors: Justin John Cunningham, Ibsen Lourenco, Holger Hofmann
  • Patent number: 8426002
    Abstract: A first substrate is formed to include a surface on which a first record layer is formed, and which includes an inner circumferential portion on which a ring-shaped member is provided. Ultraviolet curing resin is dropped onto part of the surface which is located inward of the ring-shaped member, and the first substrate is then spun to coat the first record layer with the ultraviolet curing resin. Furthermore, a second substrate is formed to include a surface on which a second record layer is formed, and the second substrate is spun to coat the second record layer with ultraviolet curing resin. Then, the first and second record layers are made to face each other, and the first and second substrates are bonded to each other by the ultraviolet curing resin.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: April 23, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Koji Takazawa
  • Patent number: 8426004
    Abstract: The invention provides a multilayer information recording medium manufacturing method, a multilayer information recording medium manufacturing apparatus, and a multilayer information recording medium that enable to make a distance from a light incident surface of the multilayer information recording medium to a farthest information recording layer thereof uniform within a plane of the medium.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: April 23, 2013
    Assignee: Panasonic Corporation
    Inventors: Yuuko Tomekawa, Morio Tomiyama
  • Patent number: 8426003
    Abstract: In an information recording medium including a substrate and an information layer having a recording layer, on and from which information is recorded and reproduced by laser beam application, the recording layer is made from a Te—O-MA-MB material consisting of Te, O, MA (wherein MA is at least one element selected from Au and Pd) and MB (wherein MB is at least one element selected from Ag, Cu and Ni) with a content of Te of 10 atom % to 50 atom %, the content of O of 40 atom % to 70 atom %, the content of MA of 3 atom % to 15 atom %, and the content of MB of 3 atom % to 15 atom %. This constitution provides a low-cost information recording medium which enables high-density recording and stable reproduction of recorded data for a long period of term.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: April 23, 2013
    Assignee: Panasonic Corporation
    Inventors: Haruhiko Habuta, Noboru Yamada, Shigeru Furumiya
  • Patent number: 8420199
    Abstract: Disclosed is a sheet for producing a multilayer optical recording medium having a repeating structure wherein a plurality of optical recording layers are laminated. The sheet for a multilayer optical recording medium has a structure having a unit wherein an optical recording layer and an adhesive layer are laminated, or a structure having a unit wherein an optical recording layer, a barrier layer and an adhesive layer are laminated in this order. The maximum height roughness (Rz) of the optical recording layer or the barrier layer is not more than 500 nm. A multilayer optical recording medium is produced by using the sheet for a multilayer optical recording medium. Also disclosed is a sheet for producing, with high precision, a high-quality multilayer optical recording medium having a repeating unit wherein a plurality of optical recording layers containing a multiphoton absorbing material are laminated. A multilayer optical recording medium is also produced by using this sheet.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: April 16, 2013
    Assignee: LINTEC Corporation
    Inventors: Masaharu Ito, Shinichi Hoshi, Ryo Takahashi, Sou Miyata, Tomoo Orui, Takeshi Kondo
  • Patent number: 8409685
    Abstract: An optical recording medium includes: a substrate having a first principal surface and a second principal surface; one or plural information signal layers formed on the first principal surface of the substrate for undergoing recording or reproduction of information signals upon irradiation with light; and a barrier layer formed on the second principal surface of the substrate for suppressing the gas release from the second principal surface of the substrate, wherein an area of a region exposing from the barrier layer of the second principal surface of the substrate is not more than 688 mm2.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: April 2, 2013
    Assignee: Sony Corporation
    Inventors: Masatsugu Suwabe, Hiroshi Nakayama, Takahiro Igari, Teruyuki Ota
  • Patent number: 8409686
    Abstract: An optical recording medium having three or more information recording layers reduces crosstalk caused by multi-reflected beams and improves signal quality. In the optical recording medium having three or more information recording layers, the refractive index of a plurality of intermediate layers disposed between adjacent information recording layers is greater than the refractive index of a cover layer disposed between a light incident surface and an information recording layer being the closest from the light incident surface.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: April 2, 2013
    Assignees: TDK Corporation, Panasonic Corporation, Sony Corporation
    Inventors: Hiroyasu Inoue, Takashi Kikukawa, Koji Mishima, Yoshiaki Komma, Joji Anzai, Jun Nakano, Manami Miyawaki, Shigeki Takagawa
  • Patent number: 8389096
    Abstract: Optical information media having high pressure-at-break values, and methods for determining pressure-at-break values are disclosed. The media have high structural integrities, and are designed to confer greater resistance to delamination forces as compared to conventional optical information media.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: March 5, 2013
    Assignee: Brigham Young University
    Inventors: Michael L. Bailey, Douglas P. Hansen, Barry M. Lunt, Christopher M. Miller