Patents by Inventor Sharat Batra

Sharat Batra 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: 10127933
    Abstract: A system according to one embodiment includes a magnetic head having a plurality of sensors arranged to simultaneously read at least three immediately adjacent data tracks on a magnetic medium, wherein none of the sensors share more than one lead with any other of the sensors. Such embodiment may be implemented in a magnetic data storage system such as a disk drive system, which may include a magnetic head, a drive mechanism for passing a magnetic medium (e.g., hard disk) over the magnetic head, and a controller electrically coupled to the magnetic head.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: November 13, 2018
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Sharat Batra, Jonathan D. Coker, Travis R. Oenning
  • Publication number: 20170365280
    Abstract: A system according to one embodiment includes a magnetic head having a plurality of sensors arranged to simultaneously read at least three immediately adjacent data tracks on a magnetic medium, wherein none of the sensors share more than one lead with any other of the sensors. Such embodiment may be implemented in a magnetic data storage system such as a disk drive system, which may include a magnetic head, a drive mechanism for passing a magnetic medium (e.g., hard disk) over the magnetic head, and a controller electrically coupled to the magnetic head.
    Type: Application
    Filed: August 11, 2017
    Publication date: December 21, 2017
    Inventors: SHARAT BATRA, JONATHAN D. COKER, TRAVIS R. OENNING
  • Patent number: 9741369
    Abstract: A system according to one embodiment includes a magnetic head having a plurality of sensors arranged to simultaneously read at least three immediately adjacent data tracks on a magnetic medium, wherein none of the sensors share more than one lead with any other of the sensors. Such embodiment may be implemented in a magnetic data storage system such as a disk drive system, which may include a magnetic head, a drive mechanism for passing a magnetic medium (e.g., hard disk) over the magnetic head, and a controller electrically coupled to the magnetic head.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: August 22, 2017
    Assignee: Western Digital Technologies, Inc.
    Inventors: Sharat Batra, Jonathan D. Coker, Travis R. Oenning
  • Patent number: 9355661
    Abstract: A magnetic recording apparatus includes a write element and an optical device for heating a portion of a magnetic medium. The optical device and the write element are arranged to generally prevent the write element from affecting the optical fields generated by the optical device.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: May 31, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Michael Allen Seigler, Sharat Batra, William Albert Challener, Hua Zhou
  • Patent number: 9299370
    Abstract: A system, according to one embodiment, includes a magnetic head having sensor structures disposed laterally along a cross-track direction, each sensor structure having a free layer, a soft bias layer positioned laterally to each sensor structure, an antiparallel coupling layer above each soft bias layer, a magnetic layer above each antiparallel coupling layer, wherein magnetic moments of the soft bias layer and the magnetic layer are antiparallel coupled, and a stabilizing layer above each magnetic layer for stabilizing a magnetic orientation of the magnetic layer. Moreover, opposing faces of the magnetic layers are positioned apart by a distance that causes each magnetic layer to form a magnetic circuit with the associated free layer and the associated soft bias layer.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: March 29, 2016
    Assignee: HGST Netherlands B.V.
    Inventors: Sharat Batra, Neil Smith, Petrus A. Van Der Heijden, Howard G. Zolla
  • Publication number: 20160049165
    Abstract: A magnetic recording apparatus includes a write element and an optical device for heating a portion of a magnetic medium. The optical device and the write element are arranged to generally prevent the write element from affecting the optical fields generated by the optical device.
    Type: Application
    Filed: September 14, 2015
    Publication date: February 18, 2016
    Inventors: Michael Allen Seigler, Sharat Batra, William Albert Challener, Hua Zhou
  • Patent number: 9230578
    Abstract: The present invention generally relates to a read head in a magnetic recording head. The read head utilizes two reader elements that are stacked in the down track direction within the same read gap to improve resolution and SNR by combining the signals from the two reader elements. The output waveform from each read element is asymmetric in the down track direction; however, by use of equalizer settings and waveform combining the algorithm in signal processing, the combined waveform has a similar or better resolution and higher SNR compared to a single read element in a smaller read gap.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: January 5, 2016
    Assignee: HGST Netherlands B.V.
    Inventors: Sharat Batra, Jonathan D. Coker, Travis R. Oenning
  • Patent number: 9159339
    Abstract: A magnetic device includes a write element having a write element tip that defines a medium confronting surface. The write element is operable to generate a first field at the medium confronting surface. A conductor is proximate the write element tip and first and second conductive leads are connected to the conductor and configured to deliver a current to the conductor to generate a second field that augments the first field. First and second side elements are disposed on opposite sides of the write element tip in a cross-track direction at the medium confronting surface. At least a portion of the first conductive lead is disposed adjacent the first side element on a side opposite the medium confronting surface, and at least a portion of the second conductive lead is disposed adjacent the second side element on a side opposite the medium confronting surface.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: October 13, 2015
    Assignee: Seagate Technology LLC
    Inventors: Werner Scholz, Thomas William Clinton, Sharat Batra, Mark Thomas Kief, Eric S. Linville, Wei Peng, Kenneth A. Medlin
  • Patent number: 9135932
    Abstract: A magnetic recording apparatus includes a write element and an optical device for heating a portion of a magnetic medium. The optical device and the write element are arranged to generally prevent the write element from affecting the optical fields generated by the optical device.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: September 15, 2015
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Michael Allen Seigler, Sharat Batra, William Albert Challener, Hua Zhou
  • Publication number: 20150248900
    Abstract: A system according to one embodiment includes a magnetic head having a plurality of sensors arranged to simultaneously read at least three immediately adjacent data tracks on a magnetic medium, wherein none of the sensors share more than one lead with any other of the sensors. Such embodiment may be implemented in a magnetic data storage system such as a disk drive system, which may include a magnetic head, a drive mechanism for passing a magnetic medium (e.g., hard disk) over the magnetic head, and a controller electrically coupled to the magnetic head.
    Type: Application
    Filed: February 28, 2014
    Publication date: September 3, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Sharat Batra, Jonathan D. Coker, Travis R. Oenning
  • Patent number: 9117464
    Abstract: Methods for manufacturing hybrid coils for magnetic write heads used in disk drives are described. One such embodiment includes a magnetic read/write head including a read transducer, and a write transducer including a pair of write poles, a hybrid coil including a first coil having a pancake coil configuration with at least one turn positioned between the pair of write poles, and a second coil having a helical coil configuration including a plurality of turns positioned between the pair of write poles, the second coil coupled to the first coil, where the at least one turn of the first coil is interleaved with the turns of the second coil.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: August 25, 2015
    Assignee: Western Digital (Fremont), LLC
    Inventors: Sharat Batra, Ut Tran, Zhigang Bai, Kevin K. Lin
  • Publication number: 20150179193
    Abstract: The present invention generally relates to a read head in a magnetic recording head. The read head utilizes two reader elements that are stacked in the down track direction within the same read gap to improve resolution and SNR by combining the signals from the two reader elements. The output waveform from each read element is asymmetric in the down track direction; however, by use of equalizer settings and waveform combining the algorithm in signal processing, the combined waveform has a similar or better resolution and higher SNR compared to a single read element in a smaller read gap.
    Type: Application
    Filed: December 23, 2013
    Publication date: June 25, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Sharat BATRA, Jonathan D. COKER, Travis R. OENNING
  • Patent number: 8717707
    Abstract: A magnetic recording head includes a magnetic recording write element including a main pole having a leading edge and an opposing trailing edge and a first side surface and a second side surface separating the leading edge from the trailing edge. A first side shield gap separates a first side shield from the first side of the main pole and a second side shield gap separates the second side shield from the second side of the main pole. A front magnetic shield is separated from the main pole trailing edge by a front shield gap. A recess extends into the front shield adjacent to the trailing edge, and parallel to the trailing edge. The recess extends laterally away from the main pole and into the front shield a distance greater than the first side shield gap or second side shield gap.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: May 6, 2014
    Assignee: Seagate Technology LLC
    Inventors: Mourad Benakli, Sharat Batra
  • Patent number: 8547659
    Abstract: A method and system for providing a magnetic recording head is described. The magnetic recording head has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The head includes a first coil, a second coil, a main pole, and a third coil. The first coil has a first plurality of turns and is configured to carry a first write current in a first direction. The second coil has a second plurality of turns and is configured to carry a second write current in a second direction. The main pole is between the first coil and the second coil. The third coil has a third plurality of turns configured to carry a third write current in a third direction.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: October 1, 2013
    Assignee: Western Digital (Fremont), LLC
    Inventors: Zhigang Bai, Zhanjie Li, Sharat Batra
  • Patent number: 8514517
    Abstract: Systems and methods for providing hybrid coils for magnetic write heads used in disk drives are described. One such system includes a magnetic read/write head including a read transducer, and a write transducer including a pair of write poles, a hybrid coil including a first coil having a pancake coil configuration including at least one turn positioned between the pair of write poles, and a second coil having a helical coil configuration including a plurality of turns positioned between the pair of write poles, the second coil coupled to the first coil, where the at least one turn of the first coil is interleaved with the turns of the second coil.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: August 20, 2013
    Assignee: Western Digital (Fremont), LLC
    Inventors: Sharat Batra, Ut Tran, Zhigang Bai, Kevin K. Lin
  • Patent number: 8472136
    Abstract: A magnetic writer comprises a write pole and a trailing shield. The write pole is proximate an air bearing surface. The trailing shield is separated from the write pole by a first write gap. The trailing shield is configured with a magnetic layer disposed between the first write gap and a second write gap.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: June 25, 2013
    Assignee: Seagate Technology LLC
    Inventors: Sharat Batra, Michael Mallary, Mourad Benakli
  • Patent number: 8405932
    Abstract: An apparatus includes a waveguide having an end adjacent to an air bearing surface, first and second poles positioned on opposite sides of the waveguide, and wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion to the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the waveguide than the first portion.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: March 26, 2013
    Assignee: Seagate Technology LLC
    Inventors: Michael Allen Seigler, Sharat Batra, Robert Earl Rottmayer, Hua Zhou, Thomas William Clinton, Jie Gong
  • Patent number: 8395867
    Abstract: A magnetic sensor has at least a free sub-stack, a reference sub-stack and a front shield. The free sub-stack has a magnetization direction substantially perpendicular to the planar orientation of the layer and extends to an air bearing surface. The reference sub-stack has a magnetization direction substantially perpendicular to the magnetization direction of the free sub-stack. The reference sub-stack is recessed from the air bearing surface and a front shield is positioned between the reference sub-stack and the air bearing surface.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: March 12, 2013
    Inventors: Dimitar Velikov Dimitrov, Zheng Gao, Wonjoon Jung, Sharat Batra, Olle Gunnar Heinonen
  • Publication number: 20130016442
    Abstract: A magnetic recording head includes a magnetic recording write element including a main pole having a leading edge and an opposing trailing edge and a first side surface and a second side surface separating the leading edge from the trailing edge. A first side shield gap separates a first side shield from the first side of the main pole and a second side shield gap separates the second side shield from the second side of the main pole. A front magnetic shield is separated from the main pole trailing edge by a front shield gap. A recess extends into the front shield adjacent to the trailing edge, and parallel to the trailing edge. The recess extends laterally away from the main pole and into the front shield a distance greater than the first side shield gap or second side shield gap.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 17, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Mourad Benakli, Sharat Batra
  • Publication number: 20120314547
    Abstract: An apparatus includes a waveguide having an end adjacent to an air bearing surface, first and second poles positioned on opposite sides of the waveguide, and wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion to the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the waveguide than the first portion.
    Type: Application
    Filed: August 20, 2012
    Publication date: December 13, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Michael Allen Seigler, Sharat Batra, Robert Earl Rottmayer, Hua Zhou, Thomas William Clinton, Jie Gong