Patent ID: 7145220
Filing Date: 2006-12-05
Classification: H01L

Abstract:
1. A semiconductor device comprising: a projecting second semiconductor layer which is formed on a first semiconductor layer; third and fourth semiconductor layers which are formed on the first semiconductor layer to be in contact with the second semiconductor layer and oppose each other via the second semiconductor layer; a gate electrode which is in contact with the second semiconductor layer with a gate insulating film interposed there between and forms a channel in the second semiconductor layer; and an insulating film which is formed in the first semiconductor layer located immediately under to third and fourth semiconductor layers, the third and fourth semiconductor layers being isolated from the first semiconductor layer by the insulating film, the second semiconductor layer being in contact with a region included in the first semiconductor layer and surrounded by the insulating film wherein the insulating film is formed in the first semiconductor layer to surround a region located immediately under the second semiconductor layer.