Patents by Inventor Junko Shimada

Junko Shimada 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 and optical recording-reproducing method using thereof
    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
  • Optical recording medium
    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
  • Optical recording medium and optical recording-reproducing method using thereof
    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
  • Optical recording medium
    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