Patents by Inventor Wenqin Hao

Wenqin Hao 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).

  • Magnetic scissor sensor with closed-loop side shield
    Patent number: 9679591
    Abstract: A scissor type magnetic sensor for magnetic data recording having a flux closure magnetic side shield structure. The magnetic sensor has a magnetic side shield structure that includes a non-magnetic layer within a magnetic material layer, with the non-magnetic layer being removed from the sensor stack so as to define upper and lower magnetic portions of the magnetic structure that are separated from one another at a region away from the sensor stack. The upper and lower magnetic portions are connected with one another in a region near the sensor stack so as to magnetic flux closure structure. The novel magnetic side shield structure provides net neutral magnetization that does not provide an inadvertent biasing to the magnetic free layers of the magnetic sensor.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: June 13, 2017
    Assignee: HGST Netherlands B.V.
    Inventors: Wenqin Hao, Quang Le, Xiaoyong Liu, Suping Song, Lei Wang
  • MAGNETIC SCISSOR SENSOR WITH CLOSED-LOOP SIDE SHIELD
    Publication number: 20170154641
    Abstract: A scissor type magnetic sensor for magnetic data recording having a flux closure magnetic side shield structure. The magnetic sensor has a magnetic side shield structure that includes a non-magnetic layer within a magnetic material layer, with the non-magnetic layer being removed from the sensor stack so as to define upper and lower magnetic portions of the magnetic structure that are separated from one another at a region away from the sensor stack. The upper and lower magnetic portions are connected with one another in a region near the sensor stack so as to magnetic flux closure structure. The novel magnetic side shield structure provides net neutral magnetization that does not provide an inadvertent biasing to the magnetic free layers of the magnetic sensor.
    Type: Application
    Filed: December 1, 2015
    Publication date: June 1, 2017
    Inventors: Wenqin Hao, Quang Le, Xiaoyong Liu, Suping Song, Lei Wang