Patent ID: 7642598

Claim:
An electronic equipment comprising: an island-like single crystalline semiconductor layer comprising silicon formed by removing portions of a single crystal silicon layer on an insulating layer comprising silicon oxide over a silicon substrate, the island-like single crystalline semiconductor layer having at least a channel formation region and source and drain regions; a gate insulating film formed on the channel formation region; a gate wiring line formed over the channel formation region with the gate insulating film interposed therebetween, wherein the gate wiring line includes a metal layer which contacts the gate insulating film; etching stoppers formed on side surfaces of the gate wiring line; side walls comprising silicon nitride formed adjacent to the side surfaces of the gate wiring line with the etching stoppers interposed therebetween, wherein silicon oxide is interposed between the island-like single crystalline semiconductor layer and the side walls; and an insulating film comprising silicon nitride formed over the island-like single crystalline semiconductor layer and the gate wiring line, wherein the island-like single crystalline semiconductor layer is 20 to 100 nm thick.