Patents by Inventor Yo Ota

Yo Ota 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).

  • Optical recording medium having a plurality of recording layers capable of suppressing off-track
    Patent number: 10204652
    Abstract: An optical recording medium includes a light-receiving surface that receives incident light and at least three information signal layers on which information signals are to be optically recorded. Among the at least three information signal layers, the information signal layer closest to the light-receiving surface has a reflectance in a range of 4% to 11%.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: February 12, 2019
    Assignee: SONY CORPORATION
    Inventors: Yo Ota, Kensaku Takahashi, Manami Miyawaki
  • OPTICAL RECORDING MEDIUM
    Publication number: 20180197572
    Abstract: An optical recording medium includes a plurality of information signal layers on which information signals are to be optically recorded. Among the plurality of information signal layers, the information signal layer closest to the light-receiving surface has a reflectance of more than 4%.
    Type: Application
    Filed: March 5, 2018
    Publication date: July 12, 2018
    Inventors: YO OTA, KENSAKU TAKAHASHI, MANAMI MIYAWAKI
  • Optical recording medium having a plurality of recording layers capable of suppressing off-track
    Patent number: 9911451
    Abstract: An optical recording medium includes a plurality of information signal layers on which information signals are to be optically recorded. Among the plurality of information signal layers, the information signal layer closest to the light-receiving surface has a reflectance of more than 4%.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: March 6, 2018
    Assignee: SONY CORPORATION
    Inventors: Yo Ota, Kensaku Takahashi, Manami Miyawaki
  • Optical recording medium
    Patent number: 9672861
    Abstract: There is provided an optical recording medium including: three reproduction layers, wherein reflectance R1, R2, and R3 of the three reproduction layers on a side of a surface irradiated with reproduction light is equal to or greater than 5%, and wherein any absolute value of a difference delta R between two selected from the reflectance R1, R2, and R3 is equal to or less than 7%.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: June 6, 2017
    Assignee: Sony Corporation
    Inventors: Kensaku Takahashi, Yo Ota, Hidehiro Kosaka
  • OPTICAL RECORDING MEDIUM
    Publication number: 20170011767
    Abstract: An optical recording medium includes a plurality of information signal layers on which information signals are to be optically recorded. Among the plurality of information signal layers, the information signal layer closest to the light-receiving surface has a reflectance of more than 4%.
    Type: Application
    Filed: January 28, 2015
    Publication date: January 12, 2017
    Inventors: Yo OTA, Kensaku TAKAHASHI, Manami MIYAWAKI
  • OPTICAL RECORDING MEDIUM
    Publication number: 20160275983
    Abstract: There is provided an optical recording medium including: three reproduction layers, wherein reflectance R1, R2, and R3 of the three reproduction layers on a side of a surface irradiated with reproduction light is equal to or greater than 5%, and wherein any absolute value of a difference delta R between two selected from the reflectance R1, R2, and R3 is equal to or less than 7%.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 22, 2016
    Applicant: Sony Corporation
    Inventors: Kensaku Takahashi, Yo Ota, Hidehiro Kosaka
  • Recording layer, information recording medium, and target
    Patent number: 9311953
    Abstract: The present invention relates to an information recording medium that has good enough recording characteristics even without containing Pd. The information recording medium has a recording layer including an oxide of Mn in which Mn atoms are partially or fully present as Mn with a valence of +4.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: April 12, 2016
    Assignee: SONY CORPORATION
    Inventors: Kotaro Kurokawa, Yo Ota
  • RECORDING LAYER, INFORMATION RECORDING MEDIUM, AND TARGET
    Publication number: 20150132606
    Abstract: The present invention relates to an information recording medium that has good enough recording characteristics even without containing Pd. The information recording medium has a recording layer including an oxide of Mn in which Mn atoms are partially or fully present as Mn with a valence of +4.
    Type: Application
    Filed: June 3, 2013
    Publication date: May 14, 2015
    Applicant: Sony Corporation
    Inventors: Kotaro Kurokawa, Yo Ota
  • Optical recording medium and manufacturing method of optical recording medium
    Patent number: 8846173
    Abstract: There is provided an optical recording medium including a substrate, an information recording layer that is formed on the substrate and has a single film structure formed by an oxide including W and Ru, and a light transmissive layer that is formed on the information recording layer.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: September 30, 2014
    Assignee: Sony Corporation
    Inventors: Yo Ota, Shigeki Takagawa, Hiroshi Uchiyama
  • OPTICAL INFORMATION RECORDING MEDIUM AND OPTICAL INFORMATION RECORDING MEDIUM LAMINATE
    Publication number: 20140050877
    Abstract: There is provided an optical information recording medium including a plurality of laminated resin layers, and an inorganic layer that is formed in an interface between the resin layers. Storage elastic moduli are different when the interface is assumed to be a boundary. An information signal is recorded in the interface.
    Type: Application
    Filed: August 5, 2013
    Publication date: February 20, 2014
    Applicant: Sony Corporation
    Inventors: Yo Ota, Shiori Tashiro, Koichi Yasuda, Hiroshi Uchiyama, Shinya Narumi, Kenji Takayanagi, Mitsuaki Oyamada, Tetsuhiro Sakamoto
  • OPTICAL INFORMATION RECORDING MEDIUM AND LAMINATE FOR OPTICAL INFORMATION RECORDING MEDIUM
    Publication number: 20140037921
    Abstract: An optical information recording medium includes multiple laminated resin layers. At least one of interfaces between the resin layers has a refractive index which gradually changes in a thickness direction of the resin layers.
    Type: Application
    Filed: July 22, 2013
    Publication date: February 6, 2014
    Applicant: Sony Corporation
    Inventors: Yo Ota, Tetsuhiro Sakamoto, Shiori Tashiro, Koichi Yasuda, Hiroshi Uchiyama, Mitsuaki Oyamada
  • OPTICAL RECORDING MEDIUM AND MANUFACTURING METHOD OF OPTICAL RECORDING MEDIUM
    Publication number: 20140011039
    Abstract: There is provided an optical recording medium including a substrate, an information recording layer that is formed on the substrate and has a single film structure formed by an oxide including W and Ru, and a light transmissive layer that is formed on the information recording layer.
    Type: Application
    Filed: June 10, 2013
    Publication date: January 9, 2014
    Inventors: Yo Ota, Shigeki Takagawa, Hiroshi Uchiyama
  • OPTICAL RECORDING MEDIUM
    Publication number: 20130095286
    Abstract: A recording layer is formed from an organic material (thermoplastic resin, thermosetting resin) having an oxygen element ratio of 9.1% or more. Examples include polyethersulfone, polyimide, and polyethylene. Alternatively, the recording layer is formed from a material in which a low-molecular compound is added to a resin and which has an oxygen element ratio after mixing of 9.1% or more.
    Type: Application
    Filed: June 24, 2011
    Publication date: April 18, 2013
    Applicant: SONY CORPORATION
    Inventors: Yo Ota, Takashi Iwamura, Mitsuaki Oyamada, Daisuke Ueda
  • OPTICAL INFORMATION RECORDING MEDIUM
    Publication number: 20110262678
    Abstract: An optical information recording medium includes a recording layer, wherein the recording layer includes a thermoplastic resin and inorganic oxide particles dispersed in the thermoplastic resin.
    Type: Application
    Filed: April 8, 2011
    Publication date: October 27, 2011
    Applicant: SONY CORPORATION
    Inventors: Yo Ota, Takashi Iwamura