Patents by Inventor Matthew Richard Gibbons

Matthew Richard Gibbons 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).

  • Current pinned dual spin valve with synthetic pinned layers
    Patent number: 6317297
    Abstract: A method and system for providing a magnetoresistive sensor is disclosed. The method and system include providing a first pinned layer, providing a first spacer layer above the first pinned layer, and providing a free layer above the first spacer layer. The method and system further include providing a second spacer layer above the free layer and providing a second pinned layer above the second spacer layer. The first pinned layer includes a first magnetic layer and a second magnetic layer separated by a first nonmagnetic layer. The first magnetic layer is antiferromagnetically coupled with the second magnetic layer. The second pinned layer includes a third magnetic layer and a fourth magnetic layer separated by a second nonmagnetic layer. The third magnetic layer is antiferromagnetically coupled with the fourth magnetic layer. The first pinned layer and the second pinned layer are pinned by a current carried by the magnetoresistive head during use.
    Type: Grant
    Filed: October 6, 1999
    Date of Patent: November 13, 2001
    Assignee: Read-Rite Corporation
    Inventors: Hua-Ching Tong, Xizeng Shi, Subrata Dey, Matthew Richard Gibbons