Patents by Inventor Sunita Gangopadhyay

Sunita Gangopadhyay 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).

  • Magnetic element with enhanced coupling portion
    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
  • Magnetic Element With Enhanced Coupling Portion
    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
  • Thermal compensation for head protrusion in a magnetic drive
    Patent number: 6842308
    Abstract: A head for a magnetic drive that includes a substrate with a thermal expansion rate CTE1. A transducer in the head has a bond to the substrate and has a transducer thermal expansion rate CTE2 that is greater than CTE1. A restraint layer in the substrate has a bond to one side of the transducer and has a first restraint layer thermal expansion rate CTE3 that is lower than CTE1. The restraint layer restrains protrusion of the transducer beyond the substrate at higher operating temperatures.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: January 11, 2005
    Assignee: Seagate Technology LLC
    Inventors: Ladislav R. Pust, Youping Mei, Sunita Gangopadhyay, Jumna P. Ramdular, Mallika Kamarajugadda
  • Domain control in shields of a magnetic transducer
    Patent number: 6710982
    Abstract: A read/write head includes a bottom shield and a shared shield. The shared shield includes a first domain and a plurality of closure domains. The read/write head also includes a magnetoresistive sensor deposited adjacent an air bearing surface between the bottom shield and the shared shield. The magnetoresistive sensor includes a magnetoresistor aligned with the first domain. Non-magnetic material separates the magnetoresistive sensor from the bottom shield and the shared shield. The shared shield includes a shaped feature that defines an unambiguous direction of magnetization for the first domain.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: March 23, 2004
    Assignee: Seagate Technology LLC
    Inventors: Anthony M. Mack, Ladislav R. Pust, Christopher J. Rea, Sunita Gangopadhyay, Patrick J. Ryan
  • Domain control in shields of a magnetic transducer
    Publication number: 20020008945
    Abstract: A read/write head includes a bottom shield and a shared shield. The shared shield includes a first domain and a plurality of closure domains. The read/write head also includes a magnetoresistive sensor deposited adjacent an air bearing surface between the bottom shield and the shared shield. The magnetoresistive sensor includes a magnetoresistor aligned with the first domain. Non-magnetic material separates the magnetoresistive sensor from the bottom shield and the shared shield. The shared shield includes a shaped feature that defines an unambiguous direction of magnetization for the first domain.
    Type: Application
    Filed: June 21, 2001
    Publication date: January 24, 2002
    Inventors: Anthony M. Mack, Ladislav R. Pust, Christopher J. Rea, Sunita Gangopadhyay, Patrick J. Ryan