Patents by Inventor Toshinori Asaumi

Toshinori Asaumi 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).

  • Magnetic recording medium, production process thereof, and magnetic recording and reproducing apparatus
    Publication number: 20030170502
    Abstract: An object of the present invention is to provide a magnetic recording medium exhibiting excellent magnetic characteristics, such as coercive force. On a substrate, a Cr-containing non-magnetic undercoat film is formed, and a magnetic film of a B-containing Co alloy is formed on the undercoat film. In the vicinity of the interface between the non-magnetic undercoat film and the magnetic film, the amount of Cr is 40 at % or less in a region R1, in which the amount of B is 1 at % or more.
    Type: Application
    Filed: April 7, 2003
    Publication date: September 11, 2003
    Applicant: SHOWA DENKO K.K.
    Inventors: Kenzo Hanawa, Toshinori Asaumi
  • Magnetic recording medium, production process thereof, and magnetic recording and reproducing apparatus
    Publication number: 20020009620
    Abstract: An object of the present invention is to provide a magnetic recording medium exhibiting excellent magnetic characteristics, such as coercive force. On a substrate, a Cr-containing non-magnetic undercoat film is formed, and a magnetic film of a B-containing Co alloy is formed on the undercoat film. In the vicinity of the interface between the non-magnetic undercoat film and the magnetic film, the amount of Cr is 40 at % or less in a region R1, in which the amount of B is 1 at % or more.
    Type: Application
    Filed: May 22, 2001
    Publication date: January 24, 2002
    Applicant: SHOWA DENKO KABUSHIKI KAISHA
    Inventors: Kenzo Hanawa, Toshinori Asaumi