Patents by Inventor Cummings Steven

Cummings Steven 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: 8481385
    Abstract: A memory device comprising a vertical transistor includes a digit line that is directly coupled to the source regions of each memory cell. Because an electrical plug is not used to form a contact between the digit line and the source regions, a number of fabrication steps may be reduced and the possibility for manufacturing defects may also be reduced. In some embodiments, a memory device may include a vertical transistor having gate regions that are recessed from an upper portion of a silicon substrate. With the gate regions recessed from the silicon substrate, the gate regions are spaced further from the source/drain regions and, accordingly, cross capacitance between the gate regions and the source/drain regions may be reduced.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: July 9, 2013
    Assignee: Micron Technology, Inc.
    Inventors: Haller A. Gordon, Tang D. Sanh, Cummings Steven