Patents by Inventor Lakshmi Ramamoorthy

Lakshmi Ramamoorthy 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).

  • Suppressing adjacent track interference/far track interference (ATI/FTI) in a hard disk drive (HDD) by an external magnetic field
    Patent number: 8169730
    Abstract: A hard disk drive (HDD) comprising a magnetic disk that includes a data storage surface and an external magnetic field parallel to the data storage surface for suppressing track interference.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: May 1, 2012
    Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.
    Inventors: Nelson Cheng, Lakshmi Ramamoorthy, Kris Schouterden, Masayoshi Shimokoshi
  • Write quality of HDD heads experiencing temporary fly-height problems
    Patent number: 8068306
    Abstract: Approaches for improving the write quality of a hard-disk drive (HDD) head experiencing temporary fly-height problem. When the hard-disk drive is idle and heads are parked on the ramp, fluid, such as a lubricant or the condensation of vapor, may collect between the surface of a platter and the head or a slider, thereby causing the head to temporarily fly higher than normal. An HDD may include electronic component(s) configured to (a) determine whether it is likely that fluid is interposed between the surface of a magnetic-recording disk and the slider or the head, and (b) temporarily adjust one or more of (i) a thermal fly height control setting of the head and (ii) a write parameter of the head to compensate for the head flying higher than normal as a result of the fluid being interposed between the surface of the disk and the slider or the head.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: November 29, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Lakshmi Ramamoorthy, David Jen, Douglas Zuercher, Masayoshi Shimokoshi, Kris Schouterden
  • SUPPRESSING ADJACENT TRACK INTERFERENCE/FAR TRACK INTERFERENCE (ATI/FTI) IN A HARD DISK DRIVE (HDD) BY AN EXTERNAL MAGNETIC FIELD
    Publication number: 20110149427
    Abstract: A hard disk drive (HDD) comprising a magnetic disk that includes a data storage surface and an external magnetic field parallel to the data storage surface for suppressing track interference.
    Type: Application
    Filed: December 17, 2009
    Publication date: June 23, 2011
    Inventors: Nelson Cheng, Lakshmi Ramamoorthy, Kris Schouterden, Masayoshi Shimokoshi
  • Write Quality of HDD Heads Experiencing Temporary Fly-Height Problems
    Publication number: 20110141607
    Abstract: Approaches for improving the write quality of a hard-disk drive (HDD) head experiencing temporary fly-height problem. When the hard-disk drive is idle and heads are parked on the ramp, fluid, such as a lubricant or the condensation of vapor, may collect between the surface of a platter and the head or a slider, thereby causing the head to temporarily fly higher than normal. An HDD may include electronic component(s) configured to (a) determine whether it is likely that fluid is interposed between the surface of a magnetic-recording disk and the slider or the head, and (b) temporarily adjust one or more of (i) a thermal fly height control setting of the head and (ii) a write parameter of the head to compensate for the head flying higher than normal as a result of the fluid being interposed between the surface of the disk and the slider or the head.
    Type: Application
    Filed: December 14, 2009
    Publication date: June 16, 2011
    Inventors: Lakshmi Ramamoorthy, David Jen, Douglas Zuercher, Masayoshi Shimokoshi, Kris Schouterden