Patents by Inventor Masatsugu Suwabe

Masatsugu Suwabe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240170016
    Abstract: Provided is a sputtering device for a multilayer optical recording medium capable of suppressing the occurrence of defects in a recording region. A sputtering device for a multilayer optical recording medium includes an outer mask, wherein the outer mask is configured to be capable of covering an outer periphery of a film-forming surface of an intermediate layer without coming into contact with the film-forming surface.
    Type: Application
    Filed: March 4, 2022
    Publication date: May 23, 2024
    Inventors: MASATSUGU SUWABE, TAKAHIRO IGARI, YOSHIO SHIRAI, TAKEHIRO SATO
  • Patent number: 10373641
    Abstract: An optical recording medium includes a plurality of information signal layers, and at least one of the plurality of information signal layers other than the farthest information signal layer from a light irradiation surface includes: a recording layer; a first dielectric layer provided on a side opposite to a light incident side of the recording layer; and a second dielectric layer provided on the light incident side of the recording layer. The first dielectric layer and the second dielectric layer include indium oxide and tin oxide, and the atomic concentration of tin in the first dielectric layer is higher than the atomic concentration of tin in the second dielectric layer.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: August 6, 2019
    Assignee: Sony Corporation
    Inventor: Masatsugu Suwabe
  • Publication number: 20180350401
    Abstract: An optical recording medium includes a plurality of information signal layers, and at least one of the plurality of information signal layers other than the farthest information signal layer from a light irradiation surface includes: a recording layer; a first dielectric layer provided on a side opposite to a light incident side of the recording layer; and a second dielectric layer provided on the light incident side of the recording layer. The first dielectric layer and the second dielectric layer include indium oxide and tin oxide, and the atomic concentration of tin in the first dielectric layer is higher than the atomic concentration of tin in the second dielectric layer.
    Type: Application
    Filed: November 10, 2016
    Publication date: December 6, 2018
    Applicant: Sony Corporation
    Inventor: Masatsugu SUWABE
  • 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: 8105750
    Abstract: Recording and reproducing characteristics and data saving reliability are secured in a write-once two-layer recording medium. A second recording layer from a side irradiated with light for recording and reproduction includes organic dye shown by a general formula of a chemical formula 3 described below (in the formula, R1 and R2 are alkyl groups of carbon number 1 to 4; Y1, Y2 respectively are organic groups independently; and X is Cl04, BF4, PF6, SbF6), and organic dye shown by a general formula of a chemical formula 4 described below (in the formula, R1, R4 are alkyl groups of carbon number 1 to 4; R2, R3 are alkyl groups of carbon number 1 to 4 or groups forming 3 to 6 membered rings by being coupled; Y1, Y2 respectively are organic groups independently; and X is Cl04, BF4, PF6, SbF6), to secure durability.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: January 31, 2012
    Assignees: Sony Corporation, Adeka Corporation
    Inventors: Yutaka Wada, Masatsugu Suwabe, Toru Yano, Koichi Shigeno
  • Patent number: 8029976
    Abstract: Disclosed is to provide with an optical recording medium of a write-once type in which an excellent recording characteristic can be obtained over low speed recording to high speed recording.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: October 4, 2011
    Assignees: Sony Corporation, Adeka Corporation
    Inventors: Yutaka Wada, Masatsugu Suwabe, Junko Shimada, Toru Yano, Keiji Oya, Koichi Shigeno
  • Patent number: 7952985
    Abstract: A recording medium is provided and includes; a substrate having a first area formed with a first groove and a second area formed with a second groove, at least one information layer provided on the substrate, and a protecting layer provided on the information layer. Predetermined binary information has previously been recorded on the first groove and the first groove is shallower or narrower than the second groove.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: May 31, 2011
    Assignee: Sony Corporation
    Inventors: Masatsugu Suwabe, Fuminori Takase
  • Publication number: 20100291337
    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: Application
    Filed: April 21, 2010
    Publication date: November 18, 2010
    Applicant: Sony Corporation
    Inventors: Masatsugu Suwabe, Hiroshi Nakayama, Takahiro Igari, Teruyuki Ota
  • Publication number: 20090148650
    Abstract: Recording and reproducing characteristics and data saving reliability are secured in a write-once two-layer recording medium. A second recording layer from a side irradiated with light for recording and reproduction includes organic dye shown by a general formula of a chemical formula 3 described below (in the formula, R1 and R2 are alkyl groups of carbon number 1 to 4; Y1, Y2 respectively are organic groups independently; and X is ClO4, BF4, PF6, SbF6), and organic dye shown by a general formula of a chemical formula 4 described below (in the formula, R1, R4 are alkyl groups of carbon number 1 to 4; R2, R3 are alkyl groups of carbon number 1 to 4 or groups forming 3 to 6 membered rings by being coupled; Y1, Y2 respectively are organic groups independently; and X is ClO4, BF4, PF6, SbF6), to secure durability.
    Type: Application
    Filed: January 26, 2007
    Publication date: June 11, 2009
    Applicants: SONY CORPORATION, ADEKA CORPORATION
    Inventors: Yutaka Wada, Masatsugu Suwabe, Toru Yano, Koichi Shigeno
  • Publication number: 20080316907
    Abstract: A recording medium is provided and includes; a substrate having a first area formed with a first groove and a second area formed with a second groove, at least one information layer provided on the substrate, and a protecting layer provided on the information layer. Predetermined binary information has previously been recorded on the first groove and the first groove is shallower or narrower than the second groove.
    Type: Application
    Filed: June 18, 2008
    Publication date: December 25, 2008
    Applicant: SONY CORPORATION
    Inventors: Masatsugu Suwabe, Fuminori Takase
  • Patent number: 7316836
    Abstract: An optical recording medium comprises a transmission substrate and a recording layer formed on the transmission substrate, the recording layer containing at least a dye material expressed by a general formula shown at the following chemical formula (in the chemical formula 1, R1 represents alkyl group having carbon numbers 1 to 4, R2, R3 represent alkyl group having carbon numbers 1 to 4, benzyl group or groups combined to form 3 to 6 rings, Y1 and Y2 independently represent organic groups and X represent ClO4, BF4, PF6, SbF6) and a dye material expressed by a general formula represented by the following chemical formula 2(in the chemical formula 2, R1 and R2 represent alkyl groups having carbon numbers 1 to 4, benzyl groups or groups combined to form 3 to 6 rings, Y1, Y2 independently represent organic groups and X represent ClO4, BF4, PF6, SbF6): In a write once type optical recording medium such as DVD?R and DVD+R, satisfactory recording characteristics can be obtained from low-speed recording to high-
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: January 8, 2008
    Assignee: Sony Corporation
    Inventors: Yutaka Wada, Masatsugu Suwabe, Toshihiro Akimori, Junko Shimada, Keiji Oya, Koichi Shigeno, Toru Yano
  • Publication number: 20060110566
    Abstract: Disclosed is to provide with an optical recording medium of a write-once type in which an excellent recording characteristic can be obtained over low speed recording to high speed recording.
    Type: Application
    Filed: October 24, 2005
    Publication date: May 25, 2006
    Inventors: Yutaka Wada, Masatsugu Suwabe, Junko Shimada, Toru Yano, Keiji Oya, Koichi Shigeno
  • Publication number: 20050094548
    Abstract: An optical recording medium comprises a transmission substrate and a recording layer formed on the transmission substrate, the recording layer containing at least a dye material expressed by a general formula shown at the following chemical formula (in the chemical formula 1, R1 represents alkyl group having carbon numbers 1 to 4, R2, R3 represent alkyl group having carbon numbers 1 to 4, benzyl group or groups combined to form 3 to 6 rings, Y1 and Y2 independently represent organic groups and X represent ClO4, BF4, PF6, SbF6) and a dye material expressed by a general formula represented by the following chemical formula 2(in the chemical formula 2, R1 and R2 represent alkyl groups having carbon numbers 1 to 4, benzyl groups or groups combined to form 3 to 6 rings, Y1, Y2 independently represent organic groups and X represent ClO4, BF4, PF6, SbF6): In a write once type optical recording medium such as DVD?R and DVD+R, satisfactory recording characteristics can be obtained from low-speed recording to high-s
    Type: Application
    Filed: October 27, 2004
    Publication date: May 5, 2005
    Applicants: Sony Corporation, ASAHI DENKA CO., LTD.
    Inventors: Yutaka Wada, Masatsugu Suwabe, Toshihiro Akimori, Junko Shimada, Keiji Oya, Koichi Shigeno, Toru Yano
  • Publication number: 20030207070
    Abstract: The present invention provides an optical recording medium including as a recording layer an organic pigment film containing an organic pigment. The organic pigment film contains as the organic pigment at least a compound exhibiting a heat generating reaction. This enables to realize a stable recording even with a low-power laser beam while maintaining a high reflection factor of the recording layer.
    Type: Application
    Filed: April 18, 2003
    Publication date: November 6, 2003
    Inventors: Toshihia Akimori, Masatsugu Suwabe, Susumu Sakamoto
  • Patent number: 6632546
    Abstract: A recording layer 6 records and stores information and comprises a plurality of layers, namely a first layer 6a and a second layer 6b. The first layer 6a is made from a recording material which gives parallel directions to saturation magnetization and sublattice magnetization. The second layer 6b is made from a recording material which gives antiparallel directions to saturation magnetization and sublattice magnetization at room temperature. The recording material for the second layer 6b gives parallel directions to saturation magnetization and sublattice magnetization at around a read temperature.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: October 14, 2003
    Assignee: Sony Corporation
    Inventors: Masatsugu Suwabe, Yoshihisa Chiba
  • Patent number: 6597647
    Abstract: To stably perform optical recording and optical reproducing under optimum conditions, in an optical recording medium having a writable recording layer on a substrate and having a maker recording area in which recording is performed by a maker on the recording layer, individual drive control information of the optical recording medium is recorded in the maker recording area, and, in optical recording and optical reproducing, optical recording and optical reproducing are performed by the drive control information under optimum conditions.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: July 22, 2003
    Assignee: Sony Corporation
    Inventors: Masayoshi Kanno, Masatsugu Suwabe
  • Publication number: 20020022154
    Abstract: In order too simplify the manufacturing process for a CAD magneto-optical recording medium and reduce the cost therefor, there is provided a magnetically induced super resolution-type magneto-optical recording medium which comprises, on a light-transmitting substrate, at least a recording layer for recording and retaining information therein, and a read-out layer for copying therein the information retained in the recording layer during reproduction of the information, wherein the magneto-optical recording medium has an exchange-coupling breaking layer between the recording layer and the read-out layer, wherein the exchange-coupling breaking layer comprises a layer of a nitride of either one of GdFeCo or TbFeCo.
    Type: Application
    Filed: June 27, 2001
    Publication date: February 21, 2002
    Applicant: SONY CORPORATION
    Inventor: Masatsugu Suwabe
  • Publication number: 20020012301
    Abstract: To stably perform optical recording and optical reproducing under optimum conditions, in an optical recording medium having a writable recording layer on a substrate and having a maker recording area in which recording is performed by a maker on the recording layer, individual drive control information of the optical recording medium is recorded in the maker recording area, and, in optical recording and optical reproducing, optical recording and optical reproducing are performed by the drive control information under optimum conditions.
    Type: Application
    Filed: March 30, 2001
    Publication date: January 31, 2002
    Inventors: Masayoshi Kanno, Masatsugu Suwabe
  • Publication number: 20010024740
    Abstract: A recording layer 6 records and stores information and comprises a plurality of layers, namely a first layer 6a and a second layer 6b. The first layer 6a is made from a recording material which gives parallel directions to saturation magnetization and sublattice magnetization. The second layer 6b is made from a recording material which gives antiparallel directions to saturation magnetization and sublattice magnetization at room temperature. The recording material for the second layer 6b gives parallel directions to saturation magnetization and sublattice magnetization at around a read temperature.
    Type: Application
    Filed: February 7, 2001
    Publication date: September 27, 2001
    Inventors: Masatsugu Suwabe, Yoshihisa Chiba
  • Patent number: 6033538
    Abstract: In a magneto-optical recording medium including a first magnetic layer which is magnetized in a predetermined direction according to a data signal and a second magnetic layer which is magnetically connected to the first magnetic layer by exchange interaction, so that a boundary magnetic wall can exist between the first magnetic layer and the second magnetic layer, the present invention increases stability of the boundary magnetic wall formed between the first magnetic layer and the second magnetic layer and to enhance a reproduction durability as well as durability against repeated recording.The first magnetic layer and the second magnetic layer are formed by sputtering. At least one of the magnetic layers composing the first magnetic layer and positioned adjacent to the second magnetic layer is formed with a sputter gas pressure greater than the sputter gas pressure applied when forming a magnetic layer composing the second magnetic layer and positioned adjacent to the first magnetic layer.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: March 7, 2000
    Assignee: Sony Corporation
    Inventors: Masatsugu Suwabe, Yoshihito Fukushima, Yoshihiro Muto