Patent ID: 7563665

Claim:
A method for manufacturing a semiconductor device, comprising: forming an opening section comprising opposing surfaces forming a groove to expose side surfaces of first and second semiconductor layers; thermally oxidizing the first and second semiconductor layer through the opening section, to thereby form a gate dielectric film on side walls of the first and second semiconductor layers; forming a gate electrode that is embedded in the opening section through the gate dielectric film and extends across a surface of an uppermost layer of the semiconductor layers; conducting an ion injection of P-type impurity from the surface side of the semiconductor layers using the gate electrode as a mask, to thereby form first source/drain layers disposed respectively on both sides of the gate electrode in the first semiconductor layer; and conducting an ion injection of N-type impurity from the surface side of the semiconductor layer using the gate electrode as a mask, to thereby form second source/drain layers disposed respectively on both sides of the gate electrode in the second semiconductor layer.