Patent ID: 8330228

Claim:
A hybrid material inversion mode GAA (Gate-All-Around) CMOSFET (Complementary Metal Oxide Semiconductor Field Effect Transistor) 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 up above the semiconductor substrate, and the PMOS region is stacked up above the NMOS region; the NMOS region and the PMOS region each includes a source region and a drain region located at the two opposite ends of the channel respectively thereof, wherein, each of the first channel and the second channel has a circular-shaped cross section and is parallel to the semiconductor substrate, the first channel is stacked up above the second channel, the first channel is formed of n-type Ge and the second channel is formed of p-type Si; the surfaces of the first channel and the second channel are substantially surrounded by the gate region; a first buried oxide layer is disposed between the PMOS region and the NMOS region, other than the gate region; and a second buried oxide layer is disposed between the NMOS region and the semiconductor substrate other than the gate region.