Patents by Inventor Yangsheng Luo

Yangsheng Luo 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).

  • Winged pole and shield structure for reducing stray field in a perpendicular write head
    Patent number: 7508628
    Abstract: A magnetic structure for use in a magnetic recording head, the structure having improved resistance to stray field writing. The magnetic structure can be for example a magnetic shield or a return pole of a perpendicular write element. The structure includes a main body portion which may have a generally rectangular configuration, and first and second wing portions extending laterally from the sides of the body at or near the ABS. The wing portions have a depth measured perpendicular to the ABS that is significantly less than the depth of the body portion (preferably less than 25 percent of the body portion). The wing portions may also have notches formed in their ABS edges. The wings conduct flux from the ABS edge of the body portion and create a flux choking effect for magnetic flux flowing into the wings.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: March 24, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Xiaodong Che, Hardayal Singh Gill, Wen-chien Hsiao, Yangsheng Luo, Xiaoyu Sui
  • Winged pole and shield structure for reducing stray field in a perpendicular write head
    Publication number: 20060092569
    Abstract: A magnetic structure for use in a magnetic recording head, the structure having improved resistance to stray field writing. The magnetic structure can be for example a magnetic shield or a return pole of a perpendicular write element. The structure includes a main body portion which may have a generally rectangular configuration, and first and second wing portions extending laterally from the sides of the body at or near the ABS. The wing portions have a depth measured perpendicular to the ABS that is significantly less than the depth of the body portion (preferably less than 25 percent of the body portion). The wing portions may also have notches formed in their ABS edges. The wings conduct flux from the ABS edge of the body portion and create a flux choking effect for magnetic flux flowing into the wings.
    Type: Application
    Filed: October 29, 2004
    Publication date: May 4, 2006
    Inventors: Xiaodong Che, Hardayal Gill, Wen-chien Hsiao, Yangsheng Luo, Xiaoyu Sui