Optical Recording Medium Or Carrier Patents (Class 428/64.4)
  • Publication number: 20090269539
    Abstract: The present invention provides an information recording medium with high reliability and excellent repeated rewriting performance even when no interface layer is formed and a method for manufacturing the same. Accordingly, the information recording medium for carrying out recording and/or reproducing by light irradiation or electric energy application has a material layer containing at least one element selected from a group GM consisting of Sn and Ga, at least one element selected from a group GL consisting of Ta and Y, and oxygen.
    Type: Application
    Filed: March 24, 2006
    Publication date: October 29, 2009
    Inventors: Yukako Doi, Rie Kojima, Noboru Yamada
  • Publication number: 20090269543
    Abstract: An optical recording medium comprises a laminate of at least two recording layers; each of the recording layers contains a metal complex dye and an organic dye in a predetermined concentration; when the recording layers comprise a first recording layer and a second recording layer in order from a light entrance side, the first recording layer contains 20 to 50 parts by weight of the metal complex dye where a total amount of the metal complex dye and the organic dye is 100 parts by weight, and the second recording layer contains 20 to 100 parts by weight of the metal complex dye where a total amount of the metal complex dye and the organic dye is 100 parts by weight. The optical recording medium is provided as one with a satisfactorily excellent initial error rate and a satisfactorily excellent error rate after a light resistance test, in each of the recording layers.
    Type: Application
    Filed: September 25, 2006
    Publication date: October 29, 2009
    Applicant: TDK CORPORATION
    Inventors: Atsushi Monden, Masahiro Shinkai, Motohiro Inoue
  • Publication number: 20090269540
    Abstract: Provided is an extremely high-density optical recording medium with excellent jitter characteristics and good recording/reproducing characteristics. An optical recording medium 20 comprises a substrate 21 with a guide groove formed therein, a layer 23 with a light reflection function, a recording layer 22 comprising a dye as a main component with a light absorption function for a wavelength of recording/reproducing light in an unrecorded state, and a cover layer 24 capable of transmitting the recording/reproducing light incident to the recording layer 22, in the order mentioned; an interlayer 30 containing at least one element selected from the group consisting of Ta, Nb, V, W, Mo, Cr and Ti, is provided between the layer 23 with the light reflection function and the recording layer 22.
    Type: Application
    Filed: January 11, 2007
    Publication date: October 29, 2009
    Applicant: Mitsubishi Kagaku Media Co.Ltd.
    Inventors: Michikazu Horie, Kenjirou Kiyono, Masae Kubo
  • Publication number: 20090269541
    Abstract: An optical recording material comprising at least one kind of chalcone type compound represented by the following general formula (I) or a metal complex using the chalcone type compound as a ligand: wherein ring A represents a 5- or 6-membered heterocyclic ring or an aromatic ring; ring B represents a 5- or 6-membered heterocyclic ring, an aromatic ring, or a metallocene structure; the above-mentioned heterocyclic and aromatic ring may be condensed with other rings or may be substituted; n is 0 or 1.
    Type: Application
    Filed: April 24, 2007
    Publication date: October 29, 2009
    Applicant: ADEKA CORPORATION
    Inventors: Toru Yano, Yohei Aoyama
  • Publication number: 20090268579
    Abstract: An optical information recording medium 1 is constructed by sequentially layering a reflective layer 11, a protective layer 12, a recording layer 13, a protective layer 14, and a light transmissive protective layer 15 on a substrate 10. As the recording layer 13, a recording layer containing ZnS, SiO2, and Sb as principal components, or preferably, a recording layer expressed by a compositional formula [(ZnS)x(SiO2)1-x]y(SbzX1-z)1-y (where 0<x?1.0, 0.3?y?0.7, and 0.8<z?1.0 are met and X denotes at least one element selected from a group of Ga, Te, V, Si, Zn, Ta, and Tb) is adopted.
    Type: Application
    Filed: February 19, 2008
    Publication date: October 29, 2009
    Applicant: SONY CORPORATION
    Inventors: Manami Miyawaki, Yuji Kuroda
  • Patent number: 7608384
    Abstract: Ternary optical data storage method and apparatus for Write Once Read Many Times (WORM) optical data storage with two-photon fluorescent writing and readout. The data storage capacity is limited by the optical resolution of a system. In CD/DVD systems, an increase in the aerial data density has been primarily achieved by decreasing the bit dimension. However, the size of the optical spot (bit) is restricted by limitations imposed by the diffraction of light (Rayleigh criterion). Therefore, technologies that can effectively create and detect spot sizes beyond the diffraction limit (sub-Rayleigh) hold promise to achieving high-density optical storage.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: October 27, 2009
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventor: Kevin D Belfield
  • Publication number: 20090263612
    Abstract: A photobleachable ink composition having: at least one light-sensitive optical-state change material; at least one bleaching accelerant; at least one solvent; and at least one binder material; wherein the ink composition has a viscosity between about 0.1 centipoise and about 10,000 centipoise, and a maximum optical absorbance in a range from about 200 nanometers to about 800 nanometers; and wherein the ink composition is capable of change from a first optical state to a second optical state upon exposure to light. The composition may also include a plasticizer.
    Type: Application
    Filed: April 18, 2008
    Publication date: October 22, 2009
    Applicant: NBC Universal, Inc.
    Inventors: David Gilles Gascoyne, Kwok Pong Chan, Daniel Olson, Marc Brian Wisnudel, Kasiraman Krishnan
  • Publication number: 20090263611
    Abstract: [Problem]: An optical recording medium having a capability of recording and/or reading high density optical information using a short wavelength laser light is provided. [Means to Address the Problem]: The optical recording medium has a capability of recording and/or reading high density optical information using a short wavelength laser light having a wavelength of 350 nm to 530 nm. The optical recording medium has a recording layer containing a metal complex compound and formed on a substrate. The metal complex compound is composed of a cyclic ?-diketone azo compound represented by the general formula (I) or general formula (II) and a divalent metal ion coordinated to the cyclic ?-diketone azo compound.
    Type: Application
    Filed: July 11, 2006
    Publication date: October 22, 2009
    Applicant: Mitsubishi Kagaku Media Co., Ltd.
    Inventors: Takashi Miyazawa, Yutaka Kurose, Hisashi Shoda, Kenichi Satake, Yukiko Takahashi, Mayumi Kimura, Naoyuki Uchida, Hideki Tamagawa
  • Publication number: 20090262627
    Abstract: An information recording medium comprises a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting layer. The second recording layer is formed with a continuous second microscopic pattern of grooves. The first recording layer is formed with a continuous first microscopic pattern of grooves that is different from the second microscopic pattern. Both sidewalls of raised portions of the first and second microscopic patterns are formed with wobbling so as to be parallel with each other. Auxiliary information and a reference clock is recorded on these sidewalls alternately and continuously.
    Type: Application
    Filed: June 18, 2009
    Publication date: October 22, 2009
    Inventors: Tetsuya Kondo, Kenji Oishi
  • Patent number: 7601481
    Abstract: The object of the present invention is to provide a multilayer phase-change information recording medium comprises a substrate, and N layers of information layer (N represents an integral number of 2 or more), and each of the information layers comprises at least a recording layer in which information is recorded by irradiating laser beam to induce a phase change between crystalline phase and amorphous phase. The present invention is characterized in that when the information layer is disposed so that a first information layer, a second information layer, a third information layer . . .
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: October 13, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Masaru Shinkai, Michiaki Shinotsuka, Hiroyuki Iwasa
  • Patent number: 7601412
    Abstract: A method for mass-producing a recording mark capable of being reproduced even below the diffraction limit in the information recording medium. A medium comprising: a substrate including a first material on the surface, and a second material formed on a first area on the substrate, and a third material at least whose surface energy or surface curvature are different from the second material, and the second material and third material possess at least different chemical or physical characteristics, and at least the surface energy or surface curvature of the third material are greater than the second material, moreover a region formed of the third material contains less than 20 percent of the second material, and the second or the third material can be melted for performing recording or reproduction, so that a recording mark can be produced that is capable of being read even below the diffraction limit in the information recording medium.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: October 13, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Akemi Hirotsune, Yumiko Anzai
  • Patent number: 7600992
    Abstract: A date storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: October 13, 2009
    Assignee: Imation Corp.
    Inventors: Jathan D. Edwards, Donald J. Kerfeld
  • Publication number: 20090252914
    Abstract: A pirated optical recording medium may be determined which is produced by physically transferring a shape of pits and lands formed on a substrate of an optical recording medium. The optical recording medium is provided with excellent weatherability and long-term storage reliability. A reflective film formed of an Ag alloy film of Ag100-x-yXxCuy, where X is at least one element among Ti, W, Ta, V, Mo, Nb and Zr, is formed on a substrate on which main data is recorded with a combination of pits and lands. A mark may be formed so that a reproduction signal level in the recorded mark of auxiliary data write once recorded on the reflective film is increased, and a reproduction signal level is decreased in an optical recording medium prepared by physically transferring the surface shape of the pits and lands of the substrate. A pirated optical recording medium may be determined in this manner.
    Type: Application
    Filed: June 15, 2007
    Publication date: October 8, 2009
    Applicants: SONY CORPORATION, KABUSHIKI KAISHA KOBE SEIKO SHO
    Inventors: Tetsuhiro Sakamoto, Jun Nakano, Naoki Okawa, Junichi Nakai, Yuki Tauchi
  • Publication number: 20090252013
    Abstract: Provided are a novel hydrazide chelate complex compound which is excellent in terms of both solubility in a coating solvent and light fastness, which can be used for blue laser recording, and which is useful as a dye for forming a recording layer of an optical recording medium, the hydrazide chelate complex compound being represented by general formula (1) below; and a dye for forming a recording layer of an optical recording medium, the dye containing the compound. In general formula (1), ring A represents an aromatic ring; R1 and R6 each represent an aromatic ring group or a monovalent nonaromatic ring substituent having 20 or less carbon atoms; R2 to R5 each represent a hydrogen atom, an aromatic ring group, or a monovalent nonaromatic ring substituent having 20 or less carbon atoms; n represents 0 or 1; a represents an integer of 1 to 3; M represents a transition metal atom; and X represents an atom of Groups 14 to 16 of the periodic table.
    Type: Application
    Filed: August 1, 2007
    Publication date: October 8, 2009
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Takeshi Nakamura, Wataru Satou, Rieko Fujita, Naoyuki Uchida
  • Patent number: 7598360
    Abstract: A bisstyryl compound. The bisstyryl compound has formula (I): wherein Z1 and Z2 are benzene, naphthalene, or heterocyclic ring, R1 is H, C1-5 alkyl, hydroxyl, halogen atoms, or alkoxy, R2 is H, halogen atoms, C1-5 alkyl, nitro, ester, carboxyl, sulfo, sulfonamide, sulfuric ester, amide, C1-3 alkoxy, amino, alkylamino, cyano, C1-6 alkylsulfonyl, or C2-7 alkoxy carbonyl, R3, R4, R5, and R6 are H, halogen atoms, alkyl, aralkyl, or heterocyclic ring containing O, S, or N, or R3 and R4 are joined to a nitrogen atom or R5 and R6 are joined together to form a ring, R7 and R8 are H or alkyl, W is nitrogen with or without Z1 and Z2 or aromatic group without Z1 and Z2, Y is carbon, oxygen, sulfur, selenium, —NR, or —C(CH3)2, m is 1-3, n is 1-18, and X1 and X2 are anionic groups or anionic organometallic complexes.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: October 6, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Shin-Shin Wang, Chien-Wen Chen, Jong-Lieh Yang, Chii-Chang Lai, Hui-Ping Tsai, Wen-Ping Chu, Wen-Yih Liao, Chien-Liang Huang, Tzuan-Ren Jeng, Ching-Yu Hsieh, An-Tse Lee
  • Patent number: 7599280
    Abstract: In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of the recording layer is specified to be more than 10%. The recording layer and the resin layer are continuously adhered over both the read only and recording/reproducing areas 31 and 32. The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area 31 and the recording/reproducing area 32 respectively, are more than 0.1 and satisfy an inequality 1.5?T1/T2?0.5.
    Type: Grant
    Filed: October 20, 2007
    Date of Patent: October 6, 2009
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Tetsuya Kondo
  • Patent number: 7598018
    Abstract: Image formation via photoinduced fluorescence changes in a polymeric medium with two-photon fluorescence readout of a multi-layer structure. Fluorophore-containing polymers, possessing one or more basic functional groups, underwent protonation in the presence of a photoinduced acid generator upon exposure to a broad-band UV light source or fast-pulsed red to near-IR laser irradiation. Solution studies demonstrated formation of monoprotonated and diprotonated species upon irradiation, each resulting in distinctly different absorption and fluorescence properties. The fluorescence of the original, neutral, fluorophore was reduced upon monoprotonation, leading to a concomitant increase in fluorescence at longer wavelengths due to the monoprotonated form, the basis for multichannel data readout.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: October 6, 2009
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventor: Kevin D. Belfield
  • Patent number: 7598359
    Abstract: A bis(indolestyryl) compound. The bis(indolestyryl) compound has formula (I): wherein A and B comprise benzene, naphthalene, or heterocyclic ring containing O, S, or N, R1 and R1? are H, halogen, C1-5 alkyl, nitro, ester, carboxyl, sulfo, sulfonamide, amide, sulfo ester, C1-3 alkoxy, amino, alkylamino, cyano, C1-6 alkylsulfonyl, or C2-7 alkoxy carbonyl, R2, R2?, R3, and R3? comprise H, C1-6 alkyl, C6-18 aryl, C2-6 alkenyl, C3-6 cycloalkenyl, or C3-6 cycloalkyl, R4 is H, C1-5 alkyl, hydroxyl, halogen, or alkoxy, R5 and R5? comprise H, halogen, C1-5 alkyl, nitro, C1-3 alkoxy, amino, cyano, C1-6 alkylsulfonyl, or C2-7 alkoxy carbonyl, W comprises oxygen, sulfur, selenium, —NR, or —C(CH3)2, n is 1˜18 and Z1 and Z2 are different and comprise an anion or an anionic organometallic complex with +1 or +2 valence, wherein R bonded to nitrogen is C1-4 alkyl.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: October 6, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Shin-Shin Wang, Jong-Lieh Yang, Chii-Chang Lai, Hui-Ping Tsai, Wen-Ping Chu, Chien-Wen Chen, Chien-Liang Huang, Wen-Yih Liao, Ming-Chia Lee
  • Publication number: 20090246441
    Abstract: A photobleachable ink composition having: at least one light-sensitive optical-state change material; at least one bleaching agent; at least one ionic liquid plasticizer; at least one solvent; and at least one binder material; wherein the ink composition has a viscosity between about 0.1 centipoise and about 10,000 centipoise, and a maximum optical absorbance in a range from about 200 nanometers to about 800 nanometers; and wherein said ink composition is capable of change from a first optical state to a second optical state upon exposure to light.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 1, 2009
    Applicant: NBC Universal, Inc.
    Inventors: Kwok Pong Chan, David Gilles Gascoyne, Marc Brian Wisnudel, Kasiraman Krishnan
  • Publication number: 20090246558
    Abstract: An information recording medium, 15 capable of recording information by irradiation of light or applying electrical energy, wherein at least one of first and second dielectric layers 102, 106, first interface layer and counter-incident side interface layer 103, 105 is formed from a Si—In—Zr/Hf—O-based material containing at least Si, In, M1 (M1 represents at least one element selected from among Zr and Hf) and oxygen (O), with Si content being 1 atomic % or more. This medium has high recording sensitivity when information is recorded thereon, high overwrite cycle-ability and high signal intensity.
    Type: Application
    Filed: November 9, 2006
    Publication date: October 1, 2009
    Inventors: Takashi Nishihara, Yoshitaka Sakaue, Rie Kojima
  • Publication number: 20090246443
    Abstract: Provided is a simultaneous two-photon absorption three-dimensional optical recording medium for recording three-dimensionally record pits in the recording medium by simultaneous two-photon absorption and reading these recorded record pits, which has a multilayer structure prepared by laminating recording layers and intermediate layers, wherein information is recorded on the recording layers by simultaneous two-photon absorption, the intermediate layers do not change by a recording light, and sensitivities of a part of or all of the recording layers are different.
    Type: Application
    Filed: March 27, 2009
    Publication date: October 1, 2009
    Applicant: FUJIFILM CORPORATION
    Inventors: Masaharu AKIBA, Eri TAKAHASHI
  • Publication number: 20090246442
    Abstract: An optical data storage disk including a substrate, a nanocrystalline noise reduction layer formed over the substrate, a reflector formed directly on the noise reduction layer and a cover layer formed over the reflector layer. An optical source detects data from the disk through the cover layer. In some embodiments, the reflector layer forms part of a multilayer recording stack and the cover layer is formed over the multilayer recording stack. In some embodiments, the noise reduction layer includes one or more components selected from the group consisting of Ti, Ti alloys, Ti oxides, Cr, Cr alloys and Cr oxides. Additionally, a method of forming an optical data storage disk that includes a nanocrystalline noise reduction layer.
    Type: Application
    Filed: March 25, 2008
    Publication date: October 1, 2009
    Inventors: Joseph H. Sexton, Richard F. Willson
  • Patent number: 7592058
    Abstract: An optical recording medium with a high productivity is provided which can certainly record/reproduce data even when a blue or blue-violet laser beam is used as an irradiation light. An optical recording medium has a substrate and a recording layer. The recording layer includes a recording portion and a coating portion. The recording portion and the coating portion are all made substantially from Bi and O. The ratio of the number of O atoms to the total number of Bi atoms and O atoms of the coating portion is less than that of the recording portion. The ratio of the number of O atoms of the recording portion is in the range of from 62% to 77%. The ratio of the number of O atoms to the total number of Bi atoms and O atoms of the coating portion is in the range of from 60% to 70%.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: September 22, 2009
    Assignee: TDK Corporation
    Inventors: Daisuke Yoshitoku, Koji Mishima, Kazushi Tanaka
  • Publication number: 20090233036
    Abstract: An information recording medium (100) is provided with at least a first recording layer (101), which accepts a first laser beam having a first wavelength, can display a visible display pattern (pit art), and has a first pit formed thereon for reading information; and a second recording layer (102), which accepts a second laser beam having a second wavelength and can record second information by forming a second pit.
    Type: Application
    Filed: June 7, 2006
    Publication date: September 17, 2009
    Applicant: PIONEER CORPORATION
    Inventors: Kazuo Kuroda, Eiji Muramatsu, Akira Imamura
  • Publication number: 20090220724
    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: Application
    Filed: May 15, 2009
    Publication date: September 3, 2009
    Inventor: Mohammed Mohab Sabry
  • Patent number: 7582346
    Abstract: The optical recording medium comprises an active layer of inorganic material, able to undergo deformations due to the effect of an optical radiation, presenting a front face designed to receive an optical radiation during writing operations and a rear face. An additional metal layer is arranged on the rear face of the active layer. The additional metal layer preferably has a thickness comprised between 9 nanometers and 12 nanometers. The inorganic material of the active layer can be a tellurium and zinc alloy comprising an atomic percentage of between 60% and 70% of zinc and between 30% and 40% of tellurium, and preferably 65% of zinc and 35% of tellurium. The medium can comprise a semi-reflecting layer arranged on the front face of the active layer and/or a protective layer made of polymer material on the rear face.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: September 1, 2009
    Assignees: Commissariat a l'Energie Atomique, MPO International
    Inventors: Ludovic Poupinet, Bérangère Hyot, Marie-Françoise Armand
  • Patent number: 7582405
    Abstract: Imaging layers, image recording media, and methods of preparation of each, are disclosed.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: September 1, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Makarand P. Gore
  • Publication number: 20090213715
    Abstract: An information recording medium comprises a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting layer. The second recording layer is formed with a continuous second microscopic pattern of grooves. The first recording layer is formed with a continuous first microscopic pattern of grooves that is different from the second microscopic pattern. Both sidewalls of raised portions of the first and second microscopic patterns are formed with wobbling so as to be parallel with each other. Auxiliary information and a reference clock is recorded on these sidewalls alternately and continuously.
    Type: Application
    Filed: May 4, 2009
    Publication date: August 27, 2009
    Applicant: VICTOR COMPANY OF JAPAN, LIMITED
    Inventors: Tetsuya Kondo, Kenji Oishi
  • Publication number: 20090213714
    Abstract: An information recording medium comprises a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting layer. The second recording layer is formed with a continuous second microscopic pattern of grooves. The first recording layer is formed with a continuous first microscopic pattern of grooves that is different from the second microscopic pattern. Both sidewalls of raised portions of the first and second microscopic patterns are formed with wobbling so as to be parallel with each other. Auxiliary information and a reference clock is recorded on these sidewalls alternately and continuously.
    Type: Application
    Filed: May 4, 2009
    Publication date: August 27, 2009
    Applicant: VICTOR COMPANY OF JAPAN, LIMITED
    Inventors: Tetsuya Kondo, Kenji Oishi
  • Publication number: 20090213720
    Abstract: An information recording medium comprises a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting layer. The second recording layer is formed with a continuous second microscopic pattern of grooves. The first recording layer is formed with a continuous first microscopic pattern of grooves that is different from the second microscopic pattern. Both sidewalls of raised portions of the first and second microscopic patterns are formed with wobbling so as to be parallel with each other. Auxiliary information and a reference clock is recorded on these sidewalls alternately and continuously.
    Type: Application
    Filed: May 4, 2009
    Publication date: August 27, 2009
    Applicant: VICTOR COMPANY OF JAPAN, LIMITED
    Inventors: Tetsuya Kondo, Kenji Oishi
  • Publication number: 20090208692
    Abstract: Optical media of a limited usable life are disclosed. The invention relates to chemical formulations and methods and processes for creating time limiting mechanisms for the inclusion in optical media thereby providing optical media with a limited usable life in which encoded information may be accessed, played and/or read for a prescribed limited time. The invention provides formulations and methods for corrosion of and/or the corrosive degradation of a reflective layer(s) and/or reflective material of optical media such that the encoded information stored on an optical medium can not longer be read by a reading beam.
    Type: Application
    Filed: December 17, 2008
    Publication date: August 20, 2009
    Applicant: FLEXPLAY TECHNOLOGIES, INC.
    Inventors: Edward Lindholm, Louis Cincotta
  • Patent number: 7577082
    Abstract: In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of the recording layer is specified to be more than 10%. The recording layer and the resin layer are continuously adhered over both the read only and recording/reproducing areas 31 and 32. The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area 31 and the recording/reproducing area 32 respectively, are more than 0.1 and satisfy an inequality 1.5?T1/T2?0.5.
    Type: Grant
    Filed: October 20, 2007
    Date of Patent: August 18, 2009
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Tetsuya Kondo
  • Patent number: 7577083
    Abstract: In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of the recording layer is specified to be more than 10%. The recording layer and the resin layer are continuously adhered over both the read only and recording/reproducing areas 31 and 32. The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area 31 and the recording/reproducing area 32 respectively, are more than 0.1 and satisfy an inequality 1.5?T1/T2?0.5.
    Type: Grant
    Filed: October 20, 2007
    Date of Patent: August 18, 2009
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Tetsuya Kondo
  • Publication number: 20090201779
    Abstract: Disclosed is an optical disk, card or media which comprises: a) a plurality of data structures that are readable by the interrogating beam of light; and b) a composition on or in the optical disk, card or media disposed so that when the optical disk, card or media is used in the optical read-out system, the interrogating beam of light passes through the composition before or after contacting some or all of the data structures. The composition comprises a polymeric matrix with an organometallic complex dissolved therein or with metal, transition metal, metal oxide or transition metal oxide nanoparticles uniformly dispersed therein. The composition is substantially transparent to the interrogating beam and/or is substantially colorless.
    Type: Application
    Filed: April 13, 2009
    Publication date: August 13, 2009
    Inventors: David A. Waldman, Eric S. Kolb, Chunming Wang
  • Patent number: 7572496
    Abstract: A simple-structured recording medium without a mask layer and information recording and reproducing methods, which resolve thermal stability related problems arising during reproduction, the recording medium including a high melting point recording layer between first and second dielectric layers. The method of recording information on the recording medium involves irradiating a laser beam onto the recording medium to induce reaction and diffusion in the high melting point recording layer and the first and second dielectric layers. The method of reproducing information recorded on such a super-resolution near-field recording medium by the above method involves generating plasmon using crystalline particles of the high melting point recording layer and the first and second dielectric layers as a scatter source to reproduce information regardless of a diffraction limit of a laser used.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: August 11, 2009
    Assignees: Samsung Electronics Co., Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Joo-Ho Kim, Junji Tominaga
  • Patent number: 7572517
    Abstract: A silver-based alloy composition for use as a reflective, semi-reflective or highly reflective coatings or layer(s) for use in optical data storage media, low emissivity glass, transparent conductive displays, and electro-chromic mirrors, or other reflective, semi-reflective or highly reflective applications. The alloy compositions comprise silver with hafnium, and/or indium, and/or copper, and/or zinc, and/or silicon and/or tin.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: August 11, 2009
    Assignee: Target Technology Company, LLC
    Inventor: George M. Wityak
  • Publication number: 20090197034
    Abstract: The present invention relates to a method of manufacturing a stamper for replicating a high density relief structure, the method comprising the steps of: providing a master substrate (10) comprising a substrate layer (12) and a recording stack overlying the substrate layer, the recording stack comprising a mask layer (14) and an interface layer (16) between the mask layer and the substrate layer, and the mask layer comprising a phase transition material, projecting a laser beam onto selected regions (20) of the mask layer, thereby inducing a heat-related phase transition for changing the properties of the selected regions of the mask layer with respect to chemical agents, applying a chemical agent to the mask layer for removing the selected regions of the mask layer, thereby uncovering regions (22) of the interface layer, and plasma etching the recording stack, thereby forming pits (24) in the uncovered regions of the interface layer. The present invention further relates to a stamper and an optical disc.
    Type: Application
    Filed: August 25, 2006
    Publication date: August 6, 2009
    Inventors: Erwin R. Meinders, Julien J.X. De Loynes De Fumichon
  • Patent number: 7570572
    Abstract: In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of the recording layer is specified to be more than 10%. The recording layer and the resin layer are continuously adhered over both the read only and recording/reproducing areas 31 and 32. The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area 31 and the recording/reproducing area 32 respectively, are more than 0.1 and satisfy an inequality 1.5?T1/T2?0.5.
    Type: Grant
    Filed: October 20, 2007
    Date of Patent: August 4, 2009
    Assignee: Victor Company of Japan, Limited
    Inventor: Tetsuya Kondo
  • Patent number: 7570573
    Abstract: In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of the recording layer is specified to be more than 10%. The recording layer and the resin layer are continuously adhered over both the read only and recording/reproducing areas 31 and 32. The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area 31 and the recording/reproducing area 32 respectively, are more than 0.1 and satisfy an inequality 1.5?T1/T2?0.5.
    Type: Grant
    Filed: October 20, 2007
    Date of Patent: August 4, 2009
    Assignee: Victor Company of Japan, Limited
    Inventor: Tetsuya Kondo
  • Patent number: 7566673
    Abstract: A chemically strengthened glass substrate for use as the substrate of an information recording medium such as a magnetic disk, magneto-optical disk, DVD, or MD, wherein a strengthened formed by chemical strengthening exists on the outer edge surface and on the inner edge surface but substantially not on a surface on which an information recording layer is formed.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: July 28, 2009
    Assignee: Konica Minolta Opto, Inc.
    Inventor: Hideki Kawai
  • Patent number: 7567500
    Abstract: In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of the recording layer is specified to be more than 10%. The recording layer and the resin layer are continuously adhered over both the read only and recording/reproducing areas 31 and 32. The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area 31 and the recording/reproducing area 32 respectively, are more than 0.1 and satisfy an inequality 1.5?T1/T2?0.5.
    Type: Grant
    Filed: October 20, 2007
    Date of Patent: July 28, 2009
    Assignee: Victor Company of Japan, Limited
    Inventor: Tetsuya Kondo
  • Patent number: 7563521
    Abstract: An information recording medium comprises a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting layer. The second recording layer is formed with a continuous second microscopic pattern of grooves. The first recording layer is formed with a continuous first microscopic pattern of grooves that is different from the second microscopic pattern. Both sidewalls of raised portions of the first and second microscopic patterns are formed with wobbling so as to be parallel with each other. Auxiliary information and a reference clock is recorded on these sidewalls alternately and continuously.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: July 21, 2009
    Assignee: Victor Company of Japan, Limited
    Inventors: Tetsuya Kondo, Kenji Oishi
  • Publication number: 20090176048
    Abstract: A recording material of Ag1-xSbx (x=10.8˜25.5 at. %) films for WORM optical disk recording media is invented. The thermal analysis shows that the phase change temperature of AgSb film is between 250 and 270?. The optical property analysis shows that all the as deposited films have good optical absorption and high reflectivity. The X-ray Diffraction analysis shows that the as deposited film and the annealed film are kept at ??-AgSb crystalline phase. The TEM analysis shows that the grain size of the Ag80.9Sb19.1 film will grow after annealing. The dynamic test shows that the carrier-to-noise ratio (CNR) of the Ag80.9Sb19.1 optical disc is about 45 dB with ?=657 nm, NA=0.65 and a linear velocity of 3.5 m/s. These Ag1-xSbx films have good optical absorption, high reflectivity and good carrier-to-noise ratio. It can be used as the WORM optical disk recording film.
    Type: Application
    Filed: April 10, 2008
    Publication date: July 9, 2009
    Applicant: CMC Magnetics Corporation
    Inventors: Po-Cheng Kuo, Yen-Hsiang Fang, Po-Wei Chen, Wei-Chih Hsu, Don-Yau Chiang, Wei-Tai Tang, Shih-Hsien Ma
  • Patent number: 7554901
    Abstract: A double sided optical disc includes a first record carrier having a light transmitting base board, a first reflecting layer formed on the base board and a first protective layer formed on the first reflecting layer; and a second record carrier having a light transmitting cover, a second reflecting layer formed on the cover and a second protective layer formed on the second reflecting layer. The first record carrier is united to the second record carrier through an adhesive layer for uniting the first protective layer to the second protective layer. The total thickness of the first record carrier and the second record carrier that are united together is not longer than 1.4 mm and the thickness of the light transmitting base board of the first record carrier is not shorter than 1.1 mm. Thus, recording surfaces having different specifications are provided on respective surfaces to improve a utility.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: June 30, 2009
    Assignee: Sony Corporation
    Inventor: Shinya Kondo
  • Publication number: 20090161502
    Abstract: An information recording medium of the present invention is an information recording medium characterized by and including a substrate; and a recording unit capable of recording three-dimensionally a recording pit on the substrate; in which the recording unit has n number of recording layers (n is an integer equal to or larger than 4) and a plurality of intermediate layers laminated with the recording layers one on another; the recording is performed by the condensed recording light using a two photon absorption phenomenon; each of the plurality of intermediate layers is substantially transparent at a wavelength ?1 of the recording light and at a wavelength ?2 of the reproduction light, respectively; the light intensity of the recording light incident into the recording layer nearest to the substrate is more than 0.707 fold as much as the light intensity of the recording light incident into the recording layer farthest from the substrate.
    Type: Application
    Filed: November 8, 2006
    Publication date: June 25, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventor: Teruhiro Shiono
  • Patent number: 7551541
    Abstract: To provide an optical information recording medium on which visual information can be recorded on a label face side by using a laser apparatus for recording and reading electronic information by irradiation with a low output laser without exerting, e.g. thermal influence over electronic information recorded on the medium. The optical information recording medium of the present invention is an optical information recording medium 100 having such a structure that on a substrate 101, an electronic information recording layer 102, a reflective layer 103 formed in contact with the opposite side of the electronic information recording layer 102 from a side where a laser beam 107 enters, a protective layer 104, a visual information recording layer 105 and an overcoat layer 106 constituting an outermost layer are laminated in this order, and having a reflectivity against a beam applied from the label face side of at least 15 and at most 50%.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: June 23, 2009
    Assignee: Mitsubishi Kagaku Media Co., Ltd.
    Inventors: Fujio Matsuishi, Kanji Shimizu
  • Publication number: 20090155514
    Abstract: A multilayer optical recording medium including at least multiple information layers having at least a phase change recording layer capable of recording information by laser irradiation and a reflection layer, wherein information layer as seen from a side of the laser irradiation has at least a lower protection layer, the phase change recording layer, an upper protection layer, the reflection layer and an optical transmission layer, the upper protection layer and the optical transmission layer in each information layer other than the innermost one are composed of an Sn oxide-containing material and a thickness of the upper protection layer in each information layer other than the innermost one as seen from the side of the laser irradiation is 2 nm to 15 nm is provided.
    Type: Application
    Filed: August 31, 2006
    Publication date: June 18, 2009
    Inventors: Hiroyoshi Sekiguchi, Michiaki Shinotsuka, Masaru Shinkai, Eiko Hibino
  • Publication number: 20090155515
    Abstract: Disclosed herein is a recording film for an optical recording medium, in which recording marks are to be formed by irradiation with a laser beam. The recording film is made of an In-base alloy containing either of an In—Ni alloy and an In—Co alloy or both the In—Ni alloy and In—Co alloy in a content in the range of 1 to 50% at. and nitrogen. The In—Ni alloy preferably has a nitrogen content in the range of 5 to 14% at. and the In—Co alloy preferably has a nitrogen content in the range of 5 to 20% at.
    Type: Application
    Filed: November 14, 2008
    Publication date: June 18, 2009
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd)
    Inventors: Hironori KAKIUCHI, Hideo FUJII
  • Publication number: 20090148649
    Abstract: The invention relates to a phase change magnetic composite material for use in an information recording medium, said material comprising a phase change material component, and a ferromagnetic material component, wherein said material exhibits both magnetic effects and phase change effects, and is usable for optical media, phase change random access memory (PCRAM) devices, magnetic random access memory (MRAM) devices, solid state memory devices, sensor devices, logical devices, cognitive devices, artificial neuron network, three level device, control device, SOC (system on chip) device, and semiconductors.
    Type: Application
    Filed: October 17, 2005
    Publication date: June 11, 2009
    Inventors: Luping Shi, Wendong Song, Xiangshui Miao, Tow Chong Chong
  • Publication number: 20090148648
    Abstract: The present invention provides an ultraviolet-curable resin composition, comprising a silicone compound represented by the following formula (1): [Chemical Formula 1] (CH3)3Si—O-A-Si(CH3)3??(1) (wherein A represents a group in which n structural units represented by a chemical formula (2) and m structural units represented by a chemical formula (3) are bonded in a random form or block form, n is an integer ranging from 1 to 15, n/m is 1/5 to 1/20, and structural units represented by the chemical formulas (2) and (3) are not bonded to either themselves or other structural parts an oxygen-oxygen bond in a molecule) and a photocurable compound that reacts with the silicone compound. The present invention also provides an optical information recording medium having a surface protective layer with an excellent spot prevention function and spot wipe-ability.
    Type: Application
    Filed: July 13, 2006
    Publication date: June 11, 2009
    Applicant: Dainippon Ink and Chemicals, Inc.
    Inventors: Mayumi Aoki, Hirokazu Saito