Patent ID: 7449375
Filing Date: 2008-11-11
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device, comprising: forming a first insulating film on a first semiconductor layer; making a hole that reaches the first semiconductor layer in the first insulating film; forming a second semiconductor layer on the first insulating film and in the hole; patterning the second semiconductor layer into a columnar shape to make part of the second semiconductor layer cover the hole; forming a gate insulating film on a side surface of the second semiconductor layer; forming a third semiconductor layer on the gate insulating film and first insulating film; patterning the third semiconductor layer and leaving the third semiconductor layer on a side surface of the second semiconductor layer in a region that should be a channel region to form a gate electrode; and forming source and drain regions in a region of the second semiconductor layer located on the first insulating film.