Patent ID: 8274118

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