Patents by Inventor David D. Terrill

David D. Terrill 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).

  • Data storage device writing tracks on a disk with equal spacing
    Patent number: 8953277
    Abstract: A data storage device is disclosed comprising a head actuated over a disk. A plurality of data tracks on the disk are first written, and a metric representing a spacing between at least two of the first written data tracks is generated. At least two of the plurality of data tracks are rewritten based on the generated metric such that the rewritten data tracks comprise a more equal spacing compared to the first written data tracks.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: February 10, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Xiao Z. Wu, David D. Terrill, Huaan Zhang
  • Method and system for measuring magnetic interference width
    Patent number: 7982989
    Abstract: A method for measuring a magnetic interference width for a magnetic recording head is described. The method includes writing a first track at a first frequency on a magnetic disk, writing a second track at the first frequency on the magnetic disk, and writing a third track at a second frequency on the magnetic disk between the first track and the second track. The third track partially overlaps both the first track and the second track and the second frequency is different from the first frequency. The method further includes measuring a readback profile across the first, second and third tracks on the magnetic disk.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: July 19, 2011
    Assignee: Western Digital (Fremont), LLC
    Inventors: Changqing Shi, Jimmy Wong, David D. Terrill