Patents by Inventor Emur Velu

Emur Velu 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).

  • PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH IMPROVED MAGNETIC ANISOTROPY FIELD
    Publication number: 20100035085
    Abstract: A perpendicular magnetic recording medium comprising a substrate, a soft underlayer, a seed layer, a non-magnetic FCC NiW alloy underlayer, a non-magnetic HCP underlayer, and a magnetic layer. We have discovered that the combination of a seed layer comprising Ta and a NiW alloy underlayer uniquely improves media recording performance and thermal stability by achieving excellent coercivity of the thin bottom magnetic recording layer and narrow C axis orientation distribution.
    Type: Application
    Filed: January 29, 2008
    Publication date: February 11, 2010
    Applicant: WD Media, Inc.
    Inventors: Hong-Sik Jung, Gerardo Bertero, Emur Velu, Michael Cheng-Chi Kuo, B. Ramamurthy Acharya, Sudhir Malhotra
  • SOFT MAGNETIC FILM FOR PERPENDICULAR RECORDING DISK
    Publication number: 20050008902
    Abstract: A perpendicular magnetic recording disk having a soft magnetic film disposed between a substrate and a magnetic recording layer. The soft magnetic film includes a soft magnetic underlayer and one or more layer groups having a spacer layer and a soft magnetic layer disposed above the spacer layer in each layer group. The spacer layers induce anti-ferromagnetic coupling between the surrounding ferromagnetic layers. The spacer layers may be comprised of ruthenium. The soft magnetic layers may have a granular decoupled structured through the use of a segregate.
    Type: Application
    Filed: May 20, 2003
    Publication date: January 13, 2005
    Inventors: Gerardo Bertero, David Wachenschwanz, Sudhir Malhotra, Emur Velu