Patents by Inventor Yih Hurng Jung

Yih Hurng Jung 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).

  • Utilization of the acceleration zone in ammonite servo writing
    Patent number: 7423831
    Abstract: A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes accelerating a head to a constant velocity across a disk. The disk being defined as having an acceleration zone and a constant velocity zone. The head is then used to write a spiral servo pattern in the constant velocity zone. A final servo pattern is written in the constant velocity zone using the spiral servo pattern. A servo reference pattern is also written in the acceleration zone. The servo reference pattern is used to write a final servo pattern in the acceleration zone. The final servo pattern may be copied using a run-out cancellation algorithm to improve the accuracy of the servo pattern in the acceleration zone.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: September 9, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Bipinchandra V. Gami, Yih Hurng Jung, Hao Ping Wen, Kwong-Tat Chan
  • Utilization of the acceleration zone in ammonite servo writing
    Publication number: 20080170323
    Abstract: A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes accelerating a head to a constant velocity across a disk. The disk being defined as having an acceleration zone and a constant velocity zone. The head is then used to write a spiral servo pattern in the constant velocity zone. A final servo pattern is written in the constant velocity zone using the spiral servo pattern. A servo reference pattern is also written in the acceleration zone. The servo reference pattern is used to write a final servo pattern in the acceleration zone. The final servo pattern may be copied using a run-out cancellation algorithm to improve the accuracy of the servo pattern in the acceleration zone.
    Type: Application
    Filed: October 17, 2006
    Publication date: July 17, 2008
    Inventors: Bipinchandra V. Gami, Yih Hurng Jung, Hao Ping Wen, Kwong-Tat Chan
  • Window timing adjustment for spiral bursts
    Patent number: 7158336
    Abstract: A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes writing a plurality of spiral servo signals with a head. The spiral servo signals are used to write servo patterns using at least one timing window. The timing window is adjusted using a position error signal generated from the spiral servo signals. The adjusted timing window is then used to write servo patterns onto the disk. Adjusting the timing window compensates for irregularities in the spiral servo signals.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: January 2, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwong-Tat Chan, Tom Chan, Bipinchandra V. Gami, Tung Nguyen, Yih Hurng Jung