Patents by Inventor Michael A. Bohm

Michael A. Bohm 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).

  • ESD protection network for IGFET circuits with SCR prevention guard rings
    Patent number: 4757363
    Abstract: An input resistor-diode protection circuit having an input resistor formed by a high impurity region within a deeper low impurity region, both a first conductivity type and input diode formed by the junction of the low impurity resistor region and the substrate along a substantial portion and a high impurity region overlapping the low impurity region at the output end of the resistor-diode circuit, both of a second conductivity type. A bipolar transistor connected to the output of the resistor in parallel to the diode also provides protection. A pair of concentric guard rings of first and second conductivity type laterally encompasses the input protection circuit.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: July 12, 1988
    Assignee: Harris Corporation
    Inventors: Michael A. Bohm, W. Ronald Young