ALEXANDRIA, Va., June 5 -- United States Patent no. 12,277,980, issued on April 15, was assigned to SOCIONEXT INC. (Kanagawa, Japan).
"Semiconductor storage device" was invented by Yasumitsu Sakai (Kanagawa, Japan) and Shinichi Moriwaki (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A layout structure of a ROM cell using a complementary FET (CFET) is provided. The ROM cell includes first and second three-dimensional transistors. The second transistor is formed above the first transistor, and the channel portions of the first and second transistors overlap each other. First data is stored in the ROM cell depending on the presence or absence of connection between a local interconnect connected...