Patents Assigned to Hitachi Storage Technologies Japan, Ltd.
  • Magnetic recording medium and manufacturing method thereof
    Patent number: 6756113
    Abstract: A magnetic recording medium includes a first underlying film of a NiTa alloy having a nonmagnetic amorphous structure and formed on a nonmagnetic substrate, and a second underlying film made of an alloy containing Cr and Ti, further a first magnetic film of a CoCrPt alloy, a nonmagnetic intermediate film of Ru and a second magnetic film of a CoCrPtB alloy that are serially formed over the first underlying film, wherein oxygen locally exists in an interface between the first underlying film and the second underlying film.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: June 29, 2004
    Assignee: Hitachi Storage Technologies Japan, Ltd.
    Inventors: Yoshibumi Matsuda, Koji Sakamoto, Tetsuya Kanbe, Yotsuo Yahisa