Patents Assigned to itrix Corporation
  • Glass substrate for an optical disk and a manufacturing method thereof
    Patent number: 6479122
    Abstract: A method of manufacturing a glass substrate for an optical disk using a press-mold formed of a super-hard material and having a surface of a prescribed roughness. A track pattern is formed in the surface of the glass substrate by inserting the substrate and a stamper containing track patterns into the press mold and pressing the substrate against the stamper. A film-like thermoplastic synthetic resin is disposed between the glass substrate and the stamper, and the glass substrate is heated to the distortion temperature point of glass.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: November 12, 2002
    Assignee: itrix Corporation
    Inventor: Yasuaki Sakamoto