Patents by Inventor Stephen D. Warley

Stephen D. Warley 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: 4983544
    Abstract: A method of forming a bridge contact between a source diffusion region of a transfer gate FET and a polysilicon-filled trench storage capacitor electrodes of the FET. A layer of titanium is evaporated at a temperature of approximately 370.degree. C., so that the titanium has a substantially columnar grain structure and a minimum of matrix material. The bottom portions of the columnar grains have a lateral length that approximates the lateral length of the dielectric separating the source diffusion from the poly-filled trench. Thus, upon sintering at 700.degree. C. in an N.sub.2 atmosphere, titanium silicide will form over all exposed silicon regions as well as the dielectric, without shorting the FET electrodes together.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: January 8, 1991
    Assignee: International Business Machines Corporation
    Inventors: Nicky C. Lu, Brian J. Machesney, Rick L. Mohler, Glen L. Miles, Chung-Yu Ting, Stephen D. Warley