Patent ID: 8354721

Claim:
A Gate-All-Around CMOSFET (Complementary Metal Oxide Semiconductor Field Effect Transistor) device comprising a semiconductor substrate, a PMOS region having a first channel, an NMOS region having a second channel, and a gate region, wherein the NMOS region is stacked above the semiconductor substrate, and the PMOS region is stacked above the NMOS region, wherein the NMOS region and the PMOS region each comprises a source region and a drain region located at the two opposite ends of the channel respectively thereof; each of the first channel and the second channel is parallel to the semiconductor substrate, and the first channel is stacked up above the second channel; the surfaces of the first channel and the second channel are substantially surrounded by the gate region; a first buried insulation layer is disposed between the PMOS region and the NMOS region other than the gate region; and a second buried insulation layer is disposed between the NMOS region and the semiconductor substrate other than the gate region.