Patents by Inventor Yeong-Fong Lee

Yeong-Fong Lee 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).

  • Protective device for an integrated circit and manufacturing method thereof
    Patent number: 5565367
    Abstract: A protective device for an integrated circuit and the manufacturing method thereof is disclosed in which a floating well is formed in a substrate by implanting first conductivity-type impurity into the substrate. The substrate is a second conductivity-type substrate. A diffusion resistor is formed in the well by implanting second conductivity-type impurity into the well. The diffusion resistor has a first terminal to be connected electrically to the driving circuit stage and a second terminal to be connected electrically to the driven circuit stage. A grounded region is formed in the well around the diffusion resistor by implanting second conductivity-type impurity into the well, and by applying a ground reference voltage to the grounded region.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: October 15, 1996
    Assignee: Hualon Micro Electronic Corporation
    Inventor: Yeong-Fong Lee