Patents by Inventor Xinjiang Shen

Xinjiang Shen 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).

  • Patent number: 11049514
    Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The head includes a main pole at a media facing surface (MFS), a trailing shield at the MFS, and a MAMR stack disposed between the main pole and the trailing shield at the MFS. The MAMR stack includes a seed layer and at least one magnetic layer. The seed layer is fabricated from a thermally conductive material having electrical resistivity lower than that of the main pole. The seed layer has a stripe height greater than a stripe height of the at least one magnetic layer. With the extended seed layer, the bias current from the trailing shield to the main pole spreads further away from the MFS along the extended seed layer before flowing into the main pole, reducing temperature rise at or near the MAMR stack, leading to improved write head reliability.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: June 29, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Michael Kuok San Ho, Yunfei Ding, Zhigang Bai, Yaguang Wei, Terence Lam, Goncalo Marcos Baião De Albuquerque, Xinjiang Shen, Feng Q. Liu
  • Patent number: 10861485
    Abstract: Embodiments of the present disclosure generally relate to data storage devices, and more specifically, to storage devices employing an energy-assisted magnetic recording write head. The write head may comprise a main pole, a trailing shield, a conducting gap disposed between the main pole and the trailing shield, and one or more current blockers. The conducting gap may be conformal with the main pole. The one or more current blockers may be configured to direct the current from the main pole to the trailing shield through the conducting gap. The one or more current blockers may be further configured to recess the conducting gap away from the media facing surface. The one or more current blockers may be configured to direct the current away from a media facing surface of the write head.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: December 8, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Muhammad Asif Bashir, Yaguang Wei, Petrus Antonius Van Der Heijden, Xinjiang Shen, Terence Lam, Zhigang Bai, Youfeng Zheng, Changqing Shi, Michael Kuok San Ho, Jian-Gang Zhu, Lijie Guan, Venkatesh Chembrolu
  • Publication number: 20200381011
    Abstract: Embodiments of the present disclosure generally relate to data storage devices, and more specifically, to storage devices employing an energy-assisted magnetic recording write head. The write head may comprise a main pole, a trailing shield, a conducting gap disposed between the main pole and the trailing shield, and one or more current blockers. The conducting gap may be conformal with the main pole. The one or more current blockers may be configured to direct the current from the main pole to the trailing shield through the conducting gap. The one or more current blockers may be further configured to recess the conducting gap away from the media facing surface. The one or more current blockers may be configured to direct the current away from a media facing surface of the write head.
    Type: Application
    Filed: August 17, 2020
    Publication date: December 3, 2020
    Inventors: Muhammad ASIF BASHIR, Yaguang WEI, Petrus Antonius VAN DER HEIJDEN, Xinjiang SHEN, Terence LAM, Zhigang BAI, Youfeng ZHENG, Changqing SHI, Michael Kuok San HO, Jian-Gang ZHU, Lijie GUAN, Venkatesh CHEMBROLU
  • Publication number: 20200349968
    Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The head includes a main pole at a media facing surface (MFS), a trailing shield at the MFS, and a MAMR stack disposed between the main pole and the trailing shield at the MFS. The MAMR stack includes a seed layer and at least one magnetic layer. The seed layer is fabricated from a thermally conductive material having electrical resistivity lower than that of the main pole. The seed layer has a stripe height greater than a stripe height of the at least one magnetic layer. With the extended seed layer, the bias current from the trailing shield to the main pole spreads further away from the MFS along the extended seed layer before flowing into the main pole, reducing temperature rise at or near the MAMR stack, leading to improved write head reliability.
    Type: Application
    Filed: July 17, 2020
    Publication date: November 5, 2020
    Inventors: Michael Kuok San HO, Yunfei DING, Zhigang BAI, Yaguang WEI, Terence LAM, Goncalo Marcos BAIÃO DE ALBUQUERQUE, Xinjiang SHEN, Feng Q. LIU
  • Patent number: 10777219
    Abstract: Embodiments of the present disclosure generally relate to data storage devices, and more specifically, to storage devices employing an energy-assisted magnetic recording write head. The write head may comprise a main pole, a trailing shield, a conducting gap disposed between the main pole and the trailing shield, and one or more current blockers. The conducting gap may be conformal with the main pole. The one or more current blockers may be configured to direct the current from the main pole to the trailing shield through the conducting gap. The one or more current blockers may be further configured to recess the conducting gap away from the media facing surface. The one or more current blockers may be configured to direct the current away from a media facing surface of the write head.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: September 15, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Muhammad Asif Bashir, Yaguang Wei, Petrus Antonius Van Der Heijden, Xinjiang Shen, Terence Lam, Zhigang Bai, Youfeng Zheng, Changqing Shi, Michael Kuok San Ho, Jian-Gang Zhu, Lijie Guan, Venkatesh Chembrolu
  • Patent number: 10741202
    Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The head includes a main pole at a media facing surface (MFS), a trailing shield at the MFS, and a MAMR stack disposed between the main pole and the trailing shield at the MFS. The MAMR stack includes a seed layer and at least one magnetic layer. The seed layer is fabricated from a thermally conductive material having electrical resistivity lower than that of the main pole. The seed layer has a stripe height greater than a stripe height of the at least one magnetic layer. With the extended seed layer, the bias current from the trailing shield to the main pole spreads further away from the MFS along the extended seed layer before flowing into the main pole, reducing temperature rise at or near the MAMR stack, leading to improved write head reliability.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: August 11, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Michael Kuok San Ho, Yunfei Ding, Zhigang Bai, Yaguang Wei, Terence Lam, Goncalo Baiao de Albuquerque, Xinjiang Shen, Feng Q. Liu
  • Publication number: 20190251992
    Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The head includes a main pole at a media facing surface (MFS), a trailing shield at the MFS, and a MAMR stack disposed between the main pole and the trailing shield at the MFS. The MAMR stack includes a seed layer and at least one magnetic layer. The seed layer is fabricated from a thermally conductive material having electrical resistivity lower than that of the main pole. The seed layer has a stripe height greater than a stripe height of the at least one magnetic layer. With the extended seed layer, the bias current from the trailing shield to the main pole spreads further away from the MFS along the extended seed layer before flowing into the main pole, reducing temperature rise at or near the MAMR stack, leading to improved write head reliability.
    Type: Application
    Filed: February 14, 2019
    Publication date: August 15, 2019
    Inventors: Michael Kuok San HO, Yunfei DING, Zhigang BAI, Yaguang WEI, Terence LAM, Goncalo BAIAO DE ALBUQUERQUE, Xinjiang SHEN, Feng Q. LIU
  • Publication number: 20150325258
    Abstract: Embodiments of the present invention generally relate to a magnetic device having a discontinuous array of columns disposed near a magnetic pole. Each column has a length extending perpendicular to an air bearing surface and a width. The length is greater than the width.
    Type: Application
    Filed: July 20, 2015
    Publication date: November 12, 2015
    Inventors: Quan-Chiu Harry LAM, Edward Hin Pong LEE, Xinjiang SHEN, Ning SHI
  • Patent number: 9099116
    Abstract: Embodiments of the present invention generally relate to a magnetic device having a discontinuous array of columns disposed near a magnetic pole. Each column has a length extending perpendicular to an air bearing surface and a width. The length is greater than the width.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: August 4, 2015
    Assignee: HGST NETHERLANDS, B.V.
    Inventors: Quan-Chiu Harry Lam, Edward Hin Pong Lee, Xinjiang Shen, Ning Shi
  • Publication number: 20150213820
    Abstract: A magnetic recording head with thermal fly height control, wherein the heating element is configured to eliminate magnetic field effects on the writing pole, which would cause otherwise cause non-symmetric writing or pole erasure. Non-symmetric writing is a phenomenon wherein magnetic writing favors one direction over another, thereby causing a timing shift in recorded data. The pole erasure is a phenomenon wherein the erasure would occur even without write current. The heating element can be formed as a plurality of electrically conductive layers separated by a non-magnetic, electrically insulating layer such as alumina. The electrically conductive layers are configured so that current flows in opposite directions through each of the electrically conductive layers such that any magnetic field generated by the current flow through one electrically conductive layer is cancelled out by a magnetic field from another electrically conductive layer.
    Type: Application
    Filed: January 28, 2014
    Publication date: July 30, 2015
    Applicant: HGST NETHERLANDS B.V.
    Inventors: Venkatesh Chembrolu, Wen-Chien D. Hsiao, Edward H.P. Lee, Xinjiang Shen
  • Publication number: 20150062753
    Abstract: Embodiments of the present invention generally relate to a magnetic device having a discontinuous array of columns disposed near a magnetic pole. Each column has a length extending perpendicular to an air bearing surface and a width. The length is greater than the width.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 5, 2015
    Applicant: HGST NETHERLANDS B.V.
    Inventors: Quan-Chiu Harry LAM, Edward Hin Pong LEE, Xinjiang SHEN, Ning SHI
  • Patent number: 8634167
    Abstract: A magnetic head for data recording having a pair of heating elements that self regulate in response to temperature to distribute heat for thermal actuation. The head includes a first heating element located adjacent to the read sensor and away from the writer, and a second heating element located adjacent to the writer. The first and second heating elements have different coefficients of thermal resistance that cause the heating of the second heating element to increase relative to that of the first heating element when the overall temperature increases or when power provided by a power source increases. There, thereby prevents the read sensor from extending too much and possibly contacting the disk.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: January 21, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Wen-Chien D. Hsiao, Xinjiang Shen
  • Publication number: 20140002927
    Abstract: A magnetic write head for magnetic data recording that includes a structure having a low coefficient of thermal expansion for controlling thermal expansion of the write head. The structure having a low coefficient of thermal expansion has a shape that substantially conforms to the shape of the write coil, such that both the write coil and the structure having a low coefficient of thermal expansion have a central portion that is located closest to the air bearing surface and outer end portions that bend away from the air bearing surface to form a horseshoe shape.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 2, 2014
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Wen-Chien D. Hsiao, Terence T.L. Lam, Yansheng Luo, Xinjiang Shen
  • Patent number: 8451696
    Abstract: A method and apparatus for providing a signal for driving a heating element in a TAR or HAMR enabled disk storage system that includes an optical transducer (or near-field optical source) for further focusing the beamspot of a laser onto a magnetic media, thereby heating the media. The storage system includes a temperature sensor proximate to the near-field transducer which provides a feedback loop to the laser driver to adjust the power of the laser.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: May 28, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Fu-Ying Huang, Lidu Huang, Chie Ching Poon, Xinjiang Shen, Barry Cushing Stipe
  • Publication number: 20130107390
    Abstract: A method and apparatus for providing a signal for driving a heating element in a TAR or HAMR enabled disk storage system that includes an optical transducer (or near-field optical source) for further focusing the beamspot of a laser onto a magnetic media, thereby heating the media. The storage system includes a temperature sensor proximate to the near-field transducer which provides a feedback loop to the laser driver to adjust the power of the laser.
    Type: Application
    Filed: October 31, 2011
    Publication date: May 2, 2013
    Inventors: Fu-Ying Huang, Lidu Huang, Chie Ching Poon, Xinjiang Shen, Barry Cushing Stipe
  • Publication number: 20120300334
    Abstract: A magnetic head for data recording having a pair of heating elements that self regulate in response to temperature to distribute heat for thermal actuation. The head includes a first heating element located adjacent to the read sensor and away from the writer, and a second heating element located adjacent to the writer. The first and second heating elements have different coefficients of thermal resistance that cause the heating of the second heating element to increase relative to that of the first heating element when the overall temperature increases or when power provided by a power source increases. There, thereby prevents the read sensor from extending too much and possibly contacting the disk.
    Type: Application
    Filed: May 27, 2011
    Publication date: November 29, 2012
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Wen-Chien D. Hsiao, Xinjiang Shen
  • Patent number: 8259412
    Abstract: A heating element for use in a thermal fly height control magnetic recording head of a magnetic data recording system. The heating element has a centrally disposed portion with a straight front edge that is recessed by a substantially constant distance, and has first and second side portions that taper away from the air bearing surface. The side portions preferably taper away from the air bearing surface by an angle of 20 to 45 degrees. The center portion of the front edge is spaced from the air bearing surface by a distance D and has a width W, such that W is 1.5 to 2.5 (or about 2) times D. D is typically 2-6 um to have good heater efficiency while being large enough to not over heat the heater. The heating element has an overall width WW and a overall depth HH from the air bearing surface such that WW is 1.5-2.5 (or about 2) times HH.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: September 4, 2012
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Wen-Chien D. Hsiao, Xinjiang Shen, Jing Zhang
  • Publication number: 20120092789
    Abstract: A heating element for use in a thermal fly height control magnetic recording head of a magnetic data recording system. The heating element has a centrally disposed portion with a straight front edge that is recessed by a substantially constant distance, and has first and second side portions that taper away from the air bearing surface. The side portions preferably taper away from the air bearing surface by an angle of 20 to 45 degrees. The center portion of the front edge is spaced from the air bearing surface by a distance D and has a width W, such that W is 1.5 to 2.5 (or about 2) times D. D is typically 2-6 um to have good heater efficiency while being large enough to not over heat the heater. The heating element has an overall width WW and a overall depth HH from the air bearing surface such that WW is 1.5-2.5 (or about 2) times HH.
    Type: Application
    Filed: October 14, 2010
    Publication date: April 19, 2012
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Wen-Chien D. Hsiao, Xinjiang Shen, Jing Zhang
  • Patent number: 7978436
    Abstract: A method and apparatus for improving flying height stability in a small form factor hard disk drive that typically moves at lower speeds is achieved by a slider having an ABS with an air channel and pocket. The air channel and pocket are configured to increase the amount of aerodynamic lift provided by normally smaller amounts of intake air at the inner diameter of the rotating disk and, thereby, to achieve a desired flying height profile.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: July 12, 2011
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Ellis T. Cha, Zhu Feng, Xinjiang Shen, Sindy Yeung
  • Patent number: 7969685
    Abstract: A DFH (Dynamic Flying Height) type slider ABS design has a stable flying height and a DFH efficiency that is uniform across the entire disk surface. These properties are a result of embedding the read/write head and heater in a trapezoidally bridged micro-pad having a very small surface area. The micro-pad is surrounded by a wing-like structure that projects from a central rail in the ABS and the micro pad is connected to an inner edge of that structure by a bridge having a trapezoidal shape. The trapezoidal shape responds effectively to variations in air flow direction and pressure point as the slider moves across the disk surface and, as a result, provides the uniform DFH efficiency. At the same time, the projecting wings and adjacent topology help to direct the airflow around the micro-pad and provide the stable flying height.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: June 28, 2011
    Assignee: SAE Magnetics (HK) Ltd.
    Inventors: Xinjiang Shen, Zhu Feng, Ellis Cha, Robert Chu