Patents by Inventor Ron Barr

Ron Barr 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).

  • Inductive write head having high magnetic moment poles and low magnetic moment thin layer in the back gap, and methods for making
    Patent number: 6989962
    Abstract: The present invention provides a write element for use in magnetic data recording system such as a computer disk drive. The write head utilizes the advantageous properties of high magnetic moments while overcoming the corrosion problems engendered by such materials. The write element includes a magnetic yoke constructed of first and second magnetic poles joined to one another at a back gap. While the majority of the poles are constructed of a high magnetic moment material a layer of relatively low magnetic moment material is provided on the first pole at the back gap portion of the first pole. The relatively low magnetic moment material prevents corrosion of the first pole during subsequent manufacturing of the write head. An electrically conductive coil passes through the magnetic yoke and is insulated there from. By passing an electrical current through the electrical coil, a magnetic flux is generated in the yoke. This magnetic flux then generates a magnetic fringing field in at a write gap of the yoke.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: January 24, 2006
    Assignee: Western Digital (Fremont), Inc.
    Inventors: Zi-Wen Dong, James Wong, Ron Barr
  • Inductive write head including a thin high moment pedestal having a tapered edge
    Patent number: 6650503
    Abstract: An inductive write element for use with a magnetic data recording and retrieval system is provided. The write element includes a magnetic yoke having an electrically conductive coil passing there through. The yoke is constructed of first and second magnetic poles, and performance of the write element is improved by the inclusion of a very thin pedestal of a high magnetic moment material on the first pole in the pole tip region. Further performance gains are realized by providing a tapered edge on the pedestal to facilitate magnetic flux flow through the pedestal.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: November 18, 2003
    Assignee: Read-Rite Corporation
    Inventors: Yingjian Chen, Ron Barr, Hua-Ching Tong, Stone Shi, Kyusik Sin
  • Method for manufacturing an inductive write element employing bi-layer photoresist to define a thin high moment pole pedestal
    Patent number: 6430806
    Abstract: An inductive write element for use with a magnetic data recording and retrieval system is provided. The write element includes a magnetic yoke having an electrically conductive coil passing there through. The yoke is constructed of first and second magnetic poles, and performance of the write element is improved by the inclusion of a very thin pedestal of a high magnetic moment material on the first pole in the pole tip region. Further performance gains are realized by providing a tapered edge on the pedestal to facilitate magnetic flux flow through the pedestal.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: August 13, 2002
    Assignee: Read-Rite Corporation
    Inventors: Yingjian Chen, Ron Barr, Hua-Ching Tong, Stone Shi, Kyusik Sin