Patents Assigned to Sony Corporation and Sony Disc Technology Inc.
  • Optical recording medium and method of producing same
    Patent number: 5846626
    Abstract: An optical recording medium capable of recording and/or reproducing an information by using a laser beam, comprising: a support layer having an information signal-recording portion on one side surface thereof on which said laser beam is incident, and a transparent layer disposed over the support layer and having a thickness smaller than that of the support layer. In accordance with the present invention, there are further provided production method for optical or magneto-optical discs whereby a high density reproduction can be achieved.
    Type: Grant
    Filed: February 21, 1996
    Date of Patent: December 8, 1998
    Assignee: Sony Corporation and Sony Disc Technology Inc.
    Inventors: Toshiyuki Kashiwagi, Motohiro Furuki, Shoji Fukuchi, Yoshitake Yanagisawa