Patents by Inventor Joseph Emanuel Silva

Joseph Emanuel Silva 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).

  • Method for precompensation/write-current latching to improve error rate
    Patent number: 7446966
    Abstract: A method is presented for writing data to a surface of a magnetic disk in a disk drive. The method includes determining a number of sector groups into which sectors of the data to be written will be grouped, loading registers with current values, kick-latching values, and precompensation values for each of said sector groups, and applying the current values, kick-latching values, and precompensation values for each of the sector groups to the write head while writing data to the sector groups of the recording media.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: November 4, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Indukumar Chenchu Kalahasthi, Quan-chiu Harry Lam, Guo Mian, Kris Schouterden, Joseph Emanuel Silva, Christopher David Wiederholt, Douglas M. Zuercher
  • Method for determining unique write inhibit thresholds for individual heads for maximizing file servo performance
    Patent number: 7209305
    Abstract: A method for determining a write inhibit threshold value for at least one head of a file during the file manufacturing process is disclosed. The method includes qualifying a test track for use in the determining of the write inhibit threshold value. The method further includes performing a write inhibit threshold determination process to obtain the write inhibit threshold value and then storing the write inhibit threshold value for use with the at least one head of the file.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: April 24, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Hin-Ching Hubert Chan, Joseph Emanuel Silva, Thomas Stanley, Yue Ming Tang