Patents by Inventor Dian Song

Dian Song 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: 8803519
    Abstract: An apparatus and associated method are generally directed to a magnetic sensor. A sensor may have a stack with an air bearing surface (ABS) and a biasing surface opposite the ABS. A biasing yoke can be disposed between a biasing magnet and the stack with the biasing magnet having a lower magnet moment than the biasing yoke.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: August 12, 2014
    Assignee: Seagate Technology LLC
    Inventors: Dimitar V. Dimitrov, Dian Song, Jason B. Gadbois
  • Patent number: 8780508
    Abstract: A magnetic element is generally provided that can be implemented as a transducing head. Various embodiments may configure a magnetic stack having a magnetically free layer with a predetermined magnetization. A side shield lamination can be separated from the magnetic stack on an air hearing surface (ABS) and biased to a bias magnetization that opposes the predetermined magnetization.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: July 15, 2014
    Assignee: Seagate Technology LLC
    Inventors: Dimitar Velikov Dimitrov, Dian Song, Mark William Covington
  • Patent number: 8749924
    Abstract: Various embodiments can have a data read stack positioned on an air bearing surface (ABS). The data read stack may be disposed between first and second buffer layers, where at least one of the buffer layers can be configured to provide a predetermined shunt ratio for the data read stack.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: June 10, 2014
    Assignee: Seagate Technology LLC
    Inventors: Dimitar Velikov Dimitrov, Dian Song, Mark William Covington
  • Publication number: 20140146419
    Abstract: A magnetic element may be configured with at least a magnetic stack having first and second magnetically free layers that each has a predetermined stripe height from an air bearing surface (ABS). The first and second magnetically free layers can respectively be configured with first and second uniaxial anisotropies that are crossed in relation to the ABS and angled in response to the predetermined stripe height.
    Type: Application
    Filed: November 28, 2012
    Publication date: May 29, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Mark William Covington, Victor Boris Sapozhnikov, Wonjoon Jung, Dimitar Velikov Demitrov, Dian Song, Taras Pohkil
  • Patent number: 8711526
    Abstract: A magnetic element is generally provided that can be implemented as a transducing head. Various embodiments may configure a magnetic stack to be separated from a side shield lamination on an air bearing surface (ABS). The side shield lamination can be constructed to have a plurality of magnetic and non-magnetic layers each coupled to a top shield.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: April 29, 2014
    Assignee: Seagate Technology LLC
    Inventors: Levent Colak, Mark William Covington, Dimitar Velikov Dimitrov, Mark Thomas Kief, Anthony Mack, Dian Song
  • Patent number: 8705212
    Abstract: An apparatus and associated method may be used to produce a magnetic element capable of detecting changes in magnetic states. Various embodiments of the present invention are generally directed to a magnetically responsive lamination of layers with a first portion and a laterally adjacent second portion. The second portion having a predetermined roughness between at least two layers capable of producing orange-peel coupling.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: April 22, 2014
    Assignee: Seagate Technology LLC
    Inventors: Jason Bryce Gadbois, Michael Christopher Kautzky, Mark William Covington, Dian Song, Dimitar Velikov Dimitrov, Qing He, Wei Tian, Thomas Boonstra, Sunita Gangopadhyay
  • Publication number: 20140002930
    Abstract: A magnetic element is generally provided that can be implemented as a transducing head. Various embodiments may configure a magnetic stack having a magnetically free layer with a predetermined magnetization. A side shield lamination can be separated from the magnetic stack on an air hearing surface (ABS) and biased to a bias magnetization that opposes the predetermined magnetization.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Dimitar Velikov Dimitrov, Dian Song, Mark William Covington
  • Publication number: 20140004385
    Abstract: A magnetic element is generally provided that can be implemented as a transducing head. Various embodiments may configure a magnetic stack to be separated from a side shield lamination on an air bearing surface (ABS). The side shield lamination can be constructed to have a plurality of magnetic and non-magnetic layers each coupled to a top shield.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Levent Colak, Mark William Covington, Dimitar Velikov Dimitrov, Mark Thomas Kief, Anthony Mack, Dian Song
  • Publication number: 20140004386
    Abstract: An apparatus can be generally directed to a magnetic stack having a magnetically free layer positioned on an air bearing surface (ABS). The magnetically free layer can be biased to a predetermined magnetization in various embodiments by a biasing structure that is coupled with the magnetically free layer and positioned distal the ABS.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Mark William Covington, Dimitar Velikov Dimitrov, Dian Song
  • Patent number: 8582247
    Abstract: An apparatus and associated method is presently disclosed for a data sensing element capable of detecting changes in magnetic states. Various embodiments of the present invention are generally directed to a magnetically responsive lamination that has a spacer layer disposed between a first and second ferromagnetic free layer. The lamination having at least one free layer with a shape feature that increases a scissoring angle between the free layers.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: November 12, 2013
    Assignee: Seagate Technology LLC
    Inventors: Dian Song, Dimitar V. Dimitrov, Mark W. Covington, Jiexuan He, Scott Stokes, Jason Gadbois
  • Publication number: 20130065084
    Abstract: Various embodiments can have a data read stack positioned on an air bearing surface (ABS). The data read stack may be disposed between first and second buffer layers, where at least one of the buffer layers can be configured to provide a predetermined shunt ratio for the data read stack.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 14, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Dimitar Velikov Dimitrov, Dian Song, Mark William Covington
  • Patent number: 8390963
    Abstract: A magnetoresistive read sensor is described. The sensor is a magnetically responsive stack positioned between top and bottom electrodes on an air bearing surface. Current in the sensor is confined to regions close to the air bearing surface by a first multilayer insulator structure between the stack and at least one electrode to enhance reader sensitivity.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: March 5, 2013
    Assignee: Seagate Technology LLC
    Inventors: Dimitar V. Dimitrov, Dian Song, Thu Van Nguyen, Carolyn Pitcher Van Dorn
  • Publication number: 20130027031
    Abstract: An apparatus and associated method are generally directed to a magnetic sensor. A sensor may have a stack with an air bearing surface (ABS) and a biasing surface opposite the ABS. A biasing yoke can be disposed between a biasing magnet and the stack with the biasing magnet having a lower magnet moment than the biasing yoke.
    Type: Application
    Filed: July 29, 2011
    Publication date: January 31, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Dimitar V. Dimitrov, Dian Song, Jason B. Gadbois
  • Publication number: 20130000107
    Abstract: A transducer having an external contact surface includes a writer and a contact member. The writer has a portion extendable relative to an adjacent portion of the external contact surface. The contact member surrounds at least a portion of the extendable writer portion and is spaced from the extendable writer portion. The coefficient of thermal expansion of the contact member is approximately equal to the coefficient of thermal expansion of the extendable writer portion.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 3, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Ladislav R. Pust, Lars H. Ahlen, Edwin F. Rejda, David C. Seets, Lance E. Stover, Dian Song, Feng Y. Wang
  • Patent number: 8310782
    Abstract: A transducing head for use with a storage medium rotatable about an axis includes first and second writers for writing to the storage medium. The first writer is configured for dedicated writing to a first radial region of the storage medium, and the second writer is configured for dedicated writing to a second radial region of the storage medium. The second radial region is located radially outward from the first radial region.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: November 13, 2012
    Assignee: Seagate Technology LLC
    Inventors: Dian Song, Huaqing Yin, Ralph William Cross
  • Patent number: 8310779
    Abstract: A head or slider having a sensor element to detect changes in head-media spacing is disclosed. In illustrated embodiments the sensor element includes a piezoelectric sensor layer or similar layer that provides acoustic emission or vibration responsive to changes in head-media spacing. In illustrated embodiments, the sensor element is located proximate to the close point of the head and slider. In embodiments described in the specification, output from the sensor element is utilized to energize a heating element or microactuator to control pole tip protrusion or actuation of transducer elements responsive to changes in head-media spacing.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: November 13, 2012
    Assignee: Seagate Technology LLC
    Inventors: Jorge Vicente Hanchi, Dian Song, John Stuart Wright, Andrew D. White
  • Publication number: 20120281319
    Abstract: A magnetic shield that is capable of enhancing magnetic reading. In accordance with various embodiments, a magnetic element has a magnetically responsive stack shielded from magnetic flux and biased to a predetermined default magnetization by at least one lateral side shield that has a transition metal layer disposed between first and second ferromagnetic layers.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 8, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Eric W. Singleton, Jae-Young Yi, Kaizhong Gao, Dimitar V. Dimitrov, Dian Song, Vladyslav A. Vas'ko
  • Publication number: 20120268847
    Abstract: A magnetoresistive read sensor is described. The sensor is a magnetically responsive stack positioned between top and bottom electrodes on an air bearing surface. Current in the sensor is confined to regions close to the air bearing surface by a first multilayer insulator structure between the stack and at least one electrode to enhance reader sensitivity.
    Type: Application
    Filed: April 25, 2011
    Publication date: October 25, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Dimitar V. Dimitrov, Dian Song, Thu Van Nguyen, Carolyn Pitcher Van Dorn
  • Publication number: 20120268846
    Abstract: An apparatus and associated method may be used to produce a magnetic element capable of detecting changes in magnetic states. Various embodiments of the present invention are generally directed to a magnetically responsive lamination of layers with a first portion and a laterally adjacent second portion. The second portion having a predetermined roughness between at least two layers capable of producing orange-peel coupling.
    Type: Application
    Filed: April 25, 2011
    Publication date: October 25, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Jason Bryce Gadbois, Michael Christopher Kautzky, Mark William Covington, Dian Song, Dimitar Velikov Dimitrov, Qing He, Wei Tian, Thomas Boonstra, Sunita Gangopadhyay
  • Publication number: 20120229935
    Abstract: An apparatus and associated method is presently disclosed for a data sensing element capable of detecting changes in magnetic states. Various embodiments of the present invention are generally directed to a magnetically responsive lamination that has a spacer layer disposed between a first and second ferromagnetic free layer. The lamination having at least one free layer with a shape feature that increases a scissoring angle between the free layers.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 13, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Dian Song, Dimitar V. Dimitrov, Mark W. Covington, Jiexuan He, Scott Stokes, Jason Gadbois