Patent ID: 7585757

Claim:
A method of manufacturing a semiconductor device, the method comprising: forming a first insulation layer on a substrate, the substrate comprising a first conductive region; forming a punch-through prevention film on the first insulation layer; forming an opening through the first insulation layer and the punch-through prevention film to expose the first conductive region; forming an epitaxial plug in the opening on the first conductive region; forming a channel film on the punch-through prevention film and the epitaxial plug; forming a punch-through prevention film pattern and the channel film pattern by patterning the punch-through prevention film and the channel film; forming a second insulation layer on the first insulation layer to cover the punch-through prevention film pattern and the channel film pattern; and forming a first contact making electrical contact with the channel film pattern through the second insulation layer, the punch-through prevention film being not penetrated by the first contact.