Patents by Inventor ShungChang Lee

ShungChang Lee 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).

  • DETECTING TOUCH DOWN AND/OR ASSESSING QUALITY IN A HARD DISK DRIVE
    Publication number: 20110299190
    Abstract: This application discloses a hard disk drive and a control circuit that are configured to determine touchdown by determining the SAGC for a track, removing the repeatable component of the SAGC to create the non-repeatable component and determining an indication of clearance irregularity and/or touch down when the standard deviation of the non-repeatable component spikes. These operations may create a defect map and/or a Flying height On Demand (FOD) control table in or for the hard disk drive as products of operating the hard disk drive.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 8, 2011
    Inventors: ShungChang Lee, Brian Thornton, Mike Suk, SeungMo Kang