Patents by Inventor Chen Hung Lee

Chen Hung 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).

  • SRAM cells, memory circuits, systems, and fabrication methods thereof
    Patent number: 8553448
    Abstract: A static random access memory (SRAM) cell includes a pair of cross-coupled inverters having a first node and a second node. A first transistor is coupled between the first node and a first bit line. A second transistor is coupled between the second node and a second bit line. A third transistor is coupled with the first node. The third transistor has a threshold voltage that is higher than that of a fourth transistor of the pair of cross-coupled inverters by about 10% or more. A fifth transistor is coupled between the third transistor and a third bit line.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: October 8, 2013
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chen Hung Lee, Hung-Jen Liao