Patents by Inventor Hai C. Nguy

Hai C. Nguy 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).

  • Monitoring a fly height of a magnetic transducer
    Patent number: 7808734
    Abstract: A method for monitoring a fly height of a magnetic transducer comprises flying the magnetic transducer at a distance of separation from a recording media. The fly height is modulated with a predetermined modulation frequency with a fly height control device. A read-back signal is read from the recording media with the magnetic transducer. A change of the read back signal is measured that results from modulating the fly height. A fault signal is provided in response to the change crossing a threshold.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: October 5, 2010
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Robert E. Eaton, Hai C. Nguy, Jeffrey R. Williams
  • Monitoring a fly height of a magnetic transducer
    Patent number: 7697223
    Abstract: A method for monitoring a fly height of a magnetic transducer comprises flying the magnetic transducer at a distance of separation from a recording media. A read-back signal is read with the magnetic transducer from the recording media. The read-back signal is rectified to produce a rectified signal. The rectified signal is filtered thereby providing a filtered signal. A fault signal is provided in response to the filtered signal exceeding a threshold.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: April 13, 2010
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Robert E. Eaton, Hai C. Nguy, Jeffrey R. Williams
  • Monitoring a fly height of a magnetic transducer
    Publication number: 20090052080
    Abstract: A method for monitoring a fly height of a magnetic transducer comprises flying the magnetic transducer at a distance of separation from a recording media. The fly height is modulated with a predetermined modulation frequency with a fly height control device. A read-back signal is read from the recording media with the magnetic transducer. A change of the read back signal is measured that results from modulating the fly height. A fault signal is provided in response to the change crossing a threshold.
    Type: Application
    Filed: August 20, 2007
    Publication date: February 26, 2009
    Inventors: Robert E. Eaton, Hai C. Nguy, Jeffrey R. Williams
  • Monitoring a fly height of a magnetic transducer
    Publication number: 20090052091
    Abstract: A method for monitoring a fly height of a magnetic transducer comprises flying the magnetic transducer at a distance of separation from a recording media. A read-back signal is read with the magnetic transducer from the recording media. The read-back signal is rectified to produce a rectified signal. The rectified signal is filtered thereby providing a filtered signal. A fault signal is provided in response to the filtered signal exceeding a threshold.
    Type: Application
    Filed: August 20, 2007
    Publication date: February 26, 2009
    Inventors: Robert E. Eaton, Hai C. Nguy, Jeffrey R. Williams