Patents by Inventor Miaoyin Wang

Miaoyin Wang 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).

  • Free layer magnetic reader that may have a reduced shield-to-shield spacing
    Patent number: 10121501
    Abstract: A magnetic read apparatus includes a read sensor, a shield structure and a side magnetic bias structure. The read sensor includes a free layer having a side and a nonmagnetic spacer layer. The shield structure includes a shield pinning structure and a shield reference structure. The nonmagnetic spacer layer is between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment in a first direction. The shield reference structure includes a shield reference structure magnetic moment weakly coupled with the pinned magnetic moment. The side magnetic bias structure is adjacent to the side of the free layer.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: November 6, 2018
    Assignee: Western Digital (Fremont), LLC
    Inventors: Gerardo A. Bertero, Shaoping Li, Qunwen Leng, Yuankai Zheng, Rongfu Xiao, Ming Mao, Shihai He, Miaoyin Wang
  • Method and system for providing a read transducer having symmetric antiferromagnetically coupled shields
    Patent number: 10074387
    Abstract: A method provides a magnetic transducer including a first antiferromagnetically coupled (AFC) shield, a second AFC shield and a read sensor between the first and second AFC shields. The first AFC shield includes first and second ferromagnetic layers and a first nonmagnetic spacer layer between the first and second ferromagnetic layers. The first and second ferromagnetic layers have first and second saturation magnetizations and first and second thicknesses, respectively. The second ferromagnetic layer is between the read sensor and the first ferromagnetic layer. The second AFC shield includes third and fourth ferromagnetic layers and a second nonmagnetic spacer layer between the third and fourth ferromagnetic layers. The third ferromagnetic layer is between the read sensor and the fourth ferromagnetic layer. The third and fourth ferromagnetic layers have third and saturation magnetizations and third and fourth thicknesses, respectively. The second AFC shield is a mirror image of the first AFC shield.
    Type: Grant
    Filed: December 21, 2014
    Date of Patent: September 11, 2018
    Assignee: WESTERN DIGITAL (FREMONT), LLC
    Inventors: Rongfu Xiao, Miaoyin Wang, Zhihong Zhang, Guanghong Luo, Ming Mao
  • FREE LAYER MAGNETIC READER THAT MAY HAVE A REDUCED SHIELD-TO-SHIELD SPACING
    Publication number: 20170249959
    Abstract: A magnetic read apparatus includes a read sensor, a shield structure and a side magnetic bias structure. The read sensor includes a free layer having a side and a nonmagnetic spacer layer. The shield structure includes a shield pinning structure and a shield reference structure. The nonmagnetic spacer layer is between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment in a first direction. The shield reference structure includes a shield reference structure magnetic moment weakly coupled with the pinned magnetic moment. The side magnetic bias structure is adjacent to the side of the free layer.
    Type: Application
    Filed: May 17, 2017
    Publication date: August 31, 2017
    Inventors: GERARDO A. BERTERO, Shaoping LI, Qunwen LENG, YUANKAI ZHENG, Rongfu XIAO, MING MAO, SHIHAI HE, Miaoyin WANG
  • Free layer magnetic reader that may have a reduced shield-to-shield spacing
    Patent number: 9666214
    Abstract: A magnetic read apparatus includes a read sensor, a shield structure and a side magnetic bias structure. The read sensor includes a free layer having a side and a nonmagnetic spacer layer. The shield structure includes a shield pinning structure and a shield reference structure. The nonmagnetic spacer layer is between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment in a first direction. The shield reference structure includes a shield reference structure magnetic moment weakly coupled with the pinned magnetic moment. The side magnetic bias structure is adjacent to the side of the free layer.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: May 30, 2017
    Assignee: WESTERN DIGITAL (FREMONT), LLC
    Inventors: Gerardo A. Bertero, Shaoping Li, Qunwen Leng, Yuankai Zheng, Rongfu Xiao, Ming Mao, Shihai He, Miaoyin Wang