Patents by Inventor James Lamar Nix

James Lamar Nix 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).

  • Perpendicular magnetic recording head with flare and taper configurations
    Patent number: 7212379
    Abstract: A magnetic write head for use in perpendicular magnetic data recording. The write head includes a write pole and a trailing shield having a tapered surface. A return pole stitched to the trailing shield is magnetically connected with the write pole at a location away from the air bearing surface (ABS).
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: May 1, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yimin Hsu, Quang Le, Jui-Lung Li, Ian Robson McFadyen, James Lamar Nix, Neil Leslie Robertson, Mason Lamar Williams, III
  • Magnetoresistive sensor with decoupled hard bias multilayers
    Patent number: 7199986
    Abstract: A magnetic sensor is provided, having two bias layers separated by a decoupling layer to eliminate exchange coupling between the bias layers. The two bias layers may have differing coercivities, such that the biases provided by the bias layers to the free layer are independently adjustable. The grain structures of the two bias layers may be substantially decorrelated by the decoupling layer.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: April 3, 2007
    Assignee: Hitachi Global Storage Technologies
    Inventors: Marie-Claire Cyrille, Meng Ding, Kuok-San Ho, Prakash Kasiraj, Ernesto Marinero, James Lamar Nix, Brian York
  • Method for biasing magnetoresistive sensor with decoupled hard bias multilayers
    Patent number: 7072156
    Abstract: A magnetic sensor is provided, having two bias layers separated by a decoupling layer to eliminate exchange coupling between the bias layers. The two bias layers may have differing coercivities, such that the biases provided by the bias layers to the free layer are independently adjustable. The grain structures of the two bias layers may be substantially decorrelated by the decoupling layer.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: July 4, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Marie-Claire Cyrille, Meng Ding, Kuok San Ho, Prakash Kasiraj, Ernesto Marinero, James Lamar Nix
  • Magnetic transducer for perpendicular magnetic recording with single pole write head with trailing shield
    Patent number: 7009812
    Abstract: The invention is a magnetic transducer with separated read and write heads for perpendicular recording. The write head has a trailing shield that extends from the return pole piece toward the main pole piece to form the write gap at the air-bearing surface. One embodiment of the trailing shield is a two part structure with a pedestal and a much smaller tip that confronts the main pole piece at the gap. In one embodiment a sink of non-magnetic, electrically conductive material is disposed in the separation gap between the read head and the flux bearing pole piece. The sink is preferably made of copper and does not extend to the ABS.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: March 7, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yimin Hsu, Quang Le, Hin Pong Edward Lee, James Lamar Nix, Aron Pentek, Kurt Rubin, Neil Smith, Nian Xiang Sun, Walter Eugene Weresin, Mason Lamar Williams
  • Head for perpendicular magnetic recording with a shield structure connected to the return pole piece
    Patent number: 7002775
    Abstract: An embodiment of the invention is a head for perpendicular recording that has a trailing shield and side shields that are connected to the return pole piece by two studs of ferromagnetic material. The studs extend parallel to the track direction and are located a sufficient distance away from the main pole piece to reduce the flux flow from the main pole piece to the studs. Optionally the studs can be recessed behind the air-bearing surface. The preferred embodiment of the invention is a magnetic transducer with separated read and write heads for perpendicular recording.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: February 21, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yimin Hsu, Quang Le, James Lamar Nix, Mason Lamar Williams