Patents by Inventor Yuming Zhou

Yuming Zhou 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).

  • Publication number: 20090262636
    Abstract: A magnetic device includes a write element including a write element tip, and a conductive coil for carrying a write current to induce a first field in the write element. A first conductor proximate a trailing edge of the write pole tip is operable to carry a first assist current to generate a second field that augments the first field. A second conductor proximate a leading edge of the write pole tip is operable to carry a second assist current to generate a third field that augments the first field. First and second side shields are on opposing sides of the write element in a cross-track direction.
    Type: Application
    Filed: April 18, 2008
    Publication date: October 22, 2009
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Jianhua Xue, Yuming Zhou, Shaoping Li, Johannes van Ek, Christopher Rea
  • Patent number: 7561380
    Abstract: A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element has a first edge closest to the main pole and a second edge furthest from the main pole. Permeability of the magnetic element increases from the first edge to the second edge.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: July 14, 2009
    Assignee: Seagate Technology LLC
    Inventors: Nurul Amin, Yuming Zhou, Kaizhong Gao, Patrick J. Ryan, Steven Kalderon, Song S. Xue, Shaoping Li, Mark T. Kief
  • Publication number: 20080186636
    Abstract: A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element has a first edge closest to the main pole and a second edge furthest from the main pole. Permeability of the magnetic element increases from the first edge to the second edge.
    Type: Application
    Filed: April 10, 2008
    Publication date: August 7, 2008
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Nurul Amin, Yuming Zhou, Kaizhong Gao, Patrick J. Ryan, Steven Kalderon, Song S. Xue, Shaoping Li, Mark T. Kief
  • Patent number: 7382575
    Abstract: A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element has a first edge closest to the main pole and a second edge furthest from the main pole. Permeability of the magnetic element increases from the first edge to the second edge.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: June 3, 2008
    Assignee: Seagate Technology LLC
    Inventors: Nurul Amin, Yuming Zhou, Kaizhong Gao, Patrick J. Ryan, Steven Kalderon, Song S. Xue, Shaoping Li, Mark T. Kief
  • Patent number: 7102854
    Abstract: A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element is formed at least in part of a magnetic material having a material property that reduces side writing at the magnetic element.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: September 5, 2006
    Assignee: Seagate Technology LLC
    Inventors: Feng Wang, Shaoping Li, Kaizhong Gao, Song S. Xue, Nurul Amin, Rick P. Michel, Ibro M. Tabakovic, Yuming Zhou
  • Publication number: 20050073774
    Abstract: A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element is formed at least in part of a magnetic material having a material property that reduces side writing at the magnetic element.
    Type: Application
    Filed: October 3, 2003
    Publication date: April 7, 2005
    Applicant: Seagate Technology LLC
    Inventors: Feng Wang, Shaoping Li, Kaizhong Gao, Song Xue, Nurul Amin, Rick Michel, Ibro Tabakovic, Yuming Zhou
  • Publication number: 20050068670
    Abstract: A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element has a first edge closest to the main pole and a second edge furthest from the main pole. Permeability of the magnetic element increases from the first edge to the second edge.
    Type: Application
    Filed: September 26, 2003
    Publication date: March 31, 2005
    Applicant: Seagate Technology LLC
    Inventors: Nurul Amin, Yuming Zhou, Kaizhong Gao, Patrick Ryan, Steven Kalderon, Song Xue, Shaoping Li, Mark Kief
  • Patent number: 6473265
    Abstract: A magnetic recording head has an air bearing surface and a magnetic core having a height and a width. The magnetic core is formed in part of a plurality of narrow slices having a plurality of insulating channels interspersed therein along the width of the magnetic core. Each of the plurality of narrow slices extends essentially along the height of the magnetic core.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: October 29, 2002
    Assignee: Seagate Technology LLC
    Inventors: Yuming Zhou, Feng Wang, Jim Giusti, Juan Fernandez-de-Castro
  • Patent number: 6441994
    Abstract: A magnetic recording head has a top pole, a write gap layer, a shared pole, and conductive coils. The shared pole has an air bearing surface, a top surface substantially normal to the air bearing surface, and a recess in the top surface extending across the top surface parallel to the air bearing surface. The shared pole is separated from the top pole at the air bearing surface by the write gap layer, and directly contacts the top pole at a region of the writer distal from the air bearing surface. Wrapped around the top pole are the conductive coils, a portion of which is positioned in the recess of the shared pole between the top pole and the shared pole.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: August 27, 2002
    Assignee: Seagate Technology LLC
    Inventors: Feng Wang, Richard P. Larson, Yuming Zhou, Patrick J. Ryan
  • Patent number: 6417990
    Abstract: A magnetic transducing head having an air bearing surface has a bottom shield, a shared pole, a read element, a substantially planar composite top pole; and a conductive coil. The read element is positioned between the bottom shield and the shared pole. The top pole is formed of high magnetic moment pole tip portion and a high resistivity yoke portion. The pole tip portion of the top pole is substantially coplanar with the yoke portion of the top pole. The pole tip portion of the top pole is separated from the shared pole at the air bearing surface by a write gap, while the yoke portion of the top pole is in contact with the shared pole opposite the air bearing surface. At least a portion of the conductive coil is positioned between the shared pole and the top pole.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: July 9, 2002
    Assignee: Seagate Technology LLC
    Inventors: Yuming Zhou, Hao Fang, Nurul Amin