Patents by Inventor Clifton H. Chang

Clifton H. Chang 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).

  • Functional recording-head on-slider lap monitor
    Patent number: 6633459
    Abstract: The invention is a magnetoresistive recording head including the reader portion that has a top and bottom shield, a first auxiliary electrical connection, a second auxiliary electrical connection, a first auxiliary electrical contact, and a second auxiliary electrical contact, where the first auxiliary electrical connection electrically connects the first auxiliary electrical contact to the top shield, and where the second auxiliary electrical connection electrically connects the second auxiliary electrical contact to the bottom shield.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: October 14, 2003
    Assignee: Seagate Technology LLC
    Inventors: Kevin Richard Heim, Clifton H. Chang, Peter Thomas Weyandt, Patrick Joseph Ryan
  • Test simulation of a read/write head
    Patent number: 6483298
    Abstract: A test simulation circuit includes a simulated read/write head with a magnet shield and a magnetoresistive sensor exposed at a lapped surface. The test simulation circuit also includes first and second electrical test path connected respectively to the magnet shield and the magnetoresistive sensor. The second electrical test path is electrically isolated from the first electrical test path.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: November 19, 2002
    Assignee: Seagate Technology LLC
    Inventors: Kevin R. Heim, Clifton H. Chang, Peter T. Weyandt, Patrick J. Ryan
  • Functional recording-head on-slider lap monitor
    Publication number: 20020015264
    Abstract: The invention is a magnetoresistive recording head including the reader portion that has a top and bottom shield, a first auxiliary electrical connection, a second auxiliary electrical connection, a first auxiliary electrical contact, and a second auxiliary electrical contact, where the first auxiliary electrical connection electrically connects the first auxiliary electrical contact to the top shield, and where the second auxiliary electrical connection electrically connects the second auxiliary electrical contact to the bottom shield.
    Type: Application
    Filed: June 18, 2001
    Publication date: February 7, 2002
    Inventors: Kevin Richard Heim, Clifton H. Chang, Peter Thomas Weyandt, Patrick Joseph Ryan
  • Test simulation of a read/write head
    Publication number: 20010052773
    Abstract: A test simulation circuit includes a simulated read/write head with a magnet shield and a magnetoresistive sensor exposed at a lapped surface. The test simulation circuit also includes first and second electrical test path connected respectively to the magnet shield and the magnetoresistive sensor. The second electrical test path is electrically isolated from the first electrical test path.
    Type: Application
    Filed: June 1, 2001
    Publication date: December 20, 2001
    Inventors: Kevin R. Heim, Clifton H. Chang, Peter T. Weyandt, Patrick J. Ryan