Patents by Inventor Ningja Zhu

Ningja Zhu 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).

  • Magnetoresistive sensor having hard biased current perpendicular to the plane sensor
    Patent number: 6353318
    Abstract: The apparatus of the present invention is embodied in a magnetic field sensor having a magnetoresistive element, a magnetic bias layer for biasing the magnetoresistive element with a magnetic field, and an electrical insulator positioned between the magnetic bias layer and the magnetoresistive element. The insulator prevents the flow of electrical current between the magnetoresistive element and the magnetic bias layer and at least a portion of the insulator allows passage of the magnetic field from the magnetic bias layer to the magnetoresistive element such that the magnetoresistive element is biased.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: March 5, 2002
    Assignee: Read-Rite Corporation
    Inventors: Kyusik Sin, Yingjian Chen, Ningja Zhu, Bill Crue