Patents by Inventor Ronald Brett Hulfachor

Ronald Brett Hulfachor 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).

  • Patent number: 6100125
    Abstract: An ESD protection device including a transistor structure with resistive regions located within active areas thereof. The transistor structure is formed of one or more MOS transistors, preferably N-type MOS transistors. The drain regions of the transistors are modified to reduce the conductivity of those resistive regions by preventing high carrier concentration implants in one or more sections of the drain regions. This is achieved by modifying an N LDD mask and the steps related thereto, as well as a silicide exclusion mask and the steps related thereto. The modifications result in the omission of N LDD dopant from the area immediately adjacent to the underlying channel. In addition, portions of a spacer oxide remain over the drain region to be formed. Subsequent implant and siliciding steps are effectively blocked by the spacer oxide that remains, leaving a low-density drain (LDD) charge carrier concentration in those regions, except where omitted.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: August 8, 2000
    Assignee: Fairchild Semiconductor Corp.
    Inventors: Ronald Brett Hulfachor, Steven Leibiger, Michael Harley-Stead, Daniel James Hahn