Patents by Inventor Bill W. Crue, Jr.

Bill W. Crue, Jr. 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: 6894877
    Abstract: A compact write element includes a conductive shield layer, an insulating write gap layer, a pole pedestal, a coil, and a conductive pole layer, and, in some embodiments also includes a backgap. The pole pedestal and the coil, and, in some embodiments the backgap, constitute a self-aligned array of components that may be formed in a single masking operation to allow for very tight tolerances between the components for a shorter yoke length. The pole layer is substantially flat and parallel to the conductive shield layer, providing for a shorter stack height. Also, a compact MR read/write head includes such a write element and a magnetic data storage and retrieval system includes the compact MR read/write head having such a write element.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: May 17, 2005
    Assignee: Western Digital Fremont, Inc.
    Inventors: Bill W. Crue, Jr., Zhupei Shi, Lijun Tong, Carlos Corona
  • Patent number: 6466402
    Abstract: A compact write element for magnetically recording data on a magnetic medium and methods for making the same. The write element includes a conductive shield layer, an insulating write gap layer, a pole pedestal, a coil, and a conductive pole layer, with some embodiments further including a backgap. The pole pedestal, coil, and in some embodiments the backgap, constitute a self-aligned array of components that may be formed with a single masking operation to allow for very tight tolerances between the components for a shorter yoke length. The pole layer of the present invention is substantially flat and parallel to the conductive shield layer, providing for a shorter stack height. The present invention includes incorporation of the compact write element in both a read/write head and a magnetic data storage and retrieval system.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: October 15, 2002
    Assignee: Read-Rite Corporation
    Inventors: Bill W. Crue, Jr., Zhupei Shi, Lijun Tong, Carlos Corona
  • Patent number: 6282056
    Abstract: The present invention describes a write element for a magnetic recording device that incorporates a second pole pedestal with a tapered shape. This tapered shape substantially reduces side-writing and the second pulse effect, each of which can limit maximum areal densities of information recorded on magnetic media. The present invention further includes a magnetic recording device incorporating a write element with a tapered second pole pedestal within the read/write head. The present invention also includes a method for producing a write element incorporating a tapered second pole pedestal.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: August 28, 2001
    Assignee: Read-Rite Corporation
    Inventors: Aiguo Feng, Zhupei Shi, Bill W. Crue, Jr.