US Patent 9853053 Three dimension integrated circuits employing thin film transistors

An integrated circuit which enables lower cost yet provides superior performance compared to standard silicon integrated circuits by utilizing thin film transistors (TFTs) fabricated in BEOL. Improved memory circuits are enabled by utilizing TFTs to improve density and access in a three dimensional circuit design which minimizes die area. Improved I/O is enabled by eliminating the area on the surface of the semiconductor dedicated to I/O and allowing many times the number of I/O available. Improved speed and lower power are also enabled by the shortened metal routing lines and reducing leakage.