Patent ID: 8575741
Filing Date: 2013-11-05
Classification: H01L

Abstract:
1. A semiconductor device comprising: an island-like single crystalline semiconductor layer over a silicon substrate with a bonded interface interposed between the island-like single crystalline semiconductor layer and the silicon substrate, the island-like single crystalline semiconductor layer comprising part of a single crystalline silicon substrate different from the silicon substrate and having at least a channel formation region and source and drain regions; an insulating film formed on the island-like single crystalline semiconductor layer; a gate electrode formed over the channel formation region with the insulating film interposed therebetween; side walls formed adjacent to side surfaces of the gate electrode; and an interlayer insulating film comprising silicon nitride formed over the gate electrode and the side walls, wherein a top face of the island-like single crystalline semiconductor layer under the gate electrode is thermally oxidized to form the insulating film, wherein a bottom face of the island-like single crystalline semiconductor layer is thermally oxidized to form a silicon oxide layer in contact with the bottom face, wherein each of the source and drain regions includes at least a portion that extends through an entire thickness of the island-like single crystalline semiconductor layer such that the source and drain regions contact the silicon oxide layer, and wherein an upper portion of the gate electrode and upper portions of the source and drain regions comprise a metal silicide.