Patent ID: 8124464

Claim:
A semiconductor device manufacturing method comprising: depositing a mask material on a semiconductor substrate, performing patterning on surface parts of the mask material and the semiconductor substrate, and thereby forming a semiconductor layer having a convex shape; forming an insulation film having a film thickness to an extent that a lower part of the semiconductor layer is buried; forming a gate insulation film on one set of both opposed side faces of the semiconductor layer; depositing a gate electrode material on the insulation film, the gate insulation film and the mask material, performing patterning on the gate electrode material and the gate insulation film, and thereby forming a gate electrode on the one set of both opposed side faces and a top face of the semiconductor layer via the gate insulation film and the mask material; forming a side wall insulation film on side faces of the gate electrode, and removing the mask material which is not covered by the gate electrode and the side wall insulation film; forming an amorphous semiconductor film on the semiconductor layer, the insulation film, the gate electrode and the side wall insulation film; selectively forming the amorphous semiconductor film formed on the top face and side faces into single crystals and thereby forming a raised semiconductor layer; selectively removing a region which is not formed into single crystals in the amorphous semiconductor film; and performing ion implantation of predetermined impurities into the picked-up semiconductor layer by using the gate electrode and the side wall insulation film as a mask, and thereby forming a source region and a drain region on a side face on which the gate electrode is not formed.