Patents by Inventor Tran Son

Tran Son 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).

  • Alignment of magnetic poles of thin film transducer
    Patent number: 5578342
    Abstract: A process for producing a thin film magnetic head uses the upper magnetic pole as a self-aligning mask for partially trimming the lower magnetic pole, wherein the yoke and pole tip regions to be trimmed are processed by separate and distinct photolithographic steps, thereby achieving noncritical alignment in the yoke area, while maintaining critical alignment in the pole tip region which includes the transducing gap.
    Type: Grant
    Filed: July 5, 1995
    Date of Patent: November 26, 1996
    Assignee: Read-Rite Corporation
    Inventors: Ut Tran, Tai Lee, Tran Son