Patents by Inventor Juan Jose Fernandez-de-Castro

Juan Jose Fernandez-de-Castro 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: 8422177
    Abstract: An apparatus that includes a first read shield and a second read shield and a reader stack between the first and second read shields. The first and second read shields each include a tilted magnetization layer closest to the reader stack to control magnetic field flux lines in a free layer of the reader stack and thereby improve a selectivity of the reader to independently sense and isolate media transitions.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: April 16, 2013
    Assignee: Seagate Technology LLC
    Inventor: Juan Jose Fernandez-de-Castro
  • Publication number: 20110267720
    Abstract: An apparatus that includes a first read shield and a second read shield and a reader stack between the first and second read shields. The first and second read shields each include a tilted magnetization layer closest to the reader stack to control magnetic field flux lines in a free layer of the reader stack and thereby improve a selectivity of the reader to independently sense and isolate media transitions.
    Type: Application
    Filed: April 30, 2010
    Publication date: November 3, 2011
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Juan Jose Fernandez-de-Castro
  • Patent number: 6680829
    Abstract: A magnetoresistive (MR) sensor for use in a magnetic storage system including a magnetic storage media having multiple concentric microtracks with information stored thereon. The MR sensor includes a plurality of generally parallel layers that form an MR stack. The MR sensor also includes a top shield and a bottom shield that are spaced apart on opposite sides of the MR stack in a longitudinal direction. The Mr sensor further includes a first and a second side shield spaced apart on opposite sides of the MR stack in a transverse direction. The top shield, bottom shield, first side shield and second side shield substantially surround the MR stack.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: January 20, 2004
    Assignee: Seagate Technology LLC
    Inventors: Lujun Chen, James Giusti, Juan Jose Fernandez-de-Castro, Jian Chen, Sining Mao
  • Publication number: 20020030947
    Abstract: A magnetoresistive (MR) sensor for use in a magnetic storage system including a magnetic storage media having multiple concentric microtracks with information stored thereon. The MR sensor includes a plurality of generally parallel layers that form an MR stack. The MR sensor also includes a top shield and a bottom shield that are spaced apart on opposite sides of the MR stack in a longitudinal direction. The Mr sensor further includes a first and a second side shield spaced apart on opposite sides of the MR stack in a transverse direction. The top shield, bottom shield, first side shield and second side shield substantially surround the MR stack.
    Type: Application
    Filed: August 20, 2001
    Publication date: March 14, 2002
    Applicant: Seagate Technology LLC
    Inventors: Lujun Chen, James Giusti, Juan Jose Fernandez-de-Castro, Jian Chen, Sining Mao
  • Publication number: 20010030839
    Abstract: A dual spin-valve magnetoresistive sensor includes a free ferromagnetic layer and first and second nonmagnetic conductive spacers adjacent to opposing first and second surfaces of the free layer, respectively. A pinned ferromagnetic layer consisting of a single-film ferromagnetic layer is adjacent to the first spacer and a laminated pinned ferromagnetic structure is adjacent to the second spacer. The laminated structure includes first and second pinned ferromagnetic films separated by a film that provides antiferromagnetic coupling. First and second antiferromagnetic layers can be provided adjacent to the pinned ferromagnetic layer and the laminated pinned structure, respectively. The sensor can be incorporated, for example, into a magnetic storage system.
    Type: Application
    Filed: January 10, 2001
    Publication date: October 18, 2001
    Inventors: Lieping Zhong, Jian Chen, Juan Jose Fernandez-De-Castro