Patent ID: 7528022

Claim:
A method of forming a fin transistor, the method comprising: forming a vertically protruding fin on a substrate, the fin comprising a top surface and sidewalls; forming a filling insulation pattern along the sidewalls of the fin; recessing the filling insulation pattern to expose an upper portion of the fin; forming a mold layer on the filling insulating pattern and the fin formed on the substrate; patterning the mold layer to form a groove, the groove dividing the upper portion of the fin into channel and source/drain portions, wherein the channel portion comprises the portion of the fin exposed by the groove and the source/drain portions comprise the portions of the fin covered by the mold layer; forming a gate electrode to fill the groove with a gate insulation layer interposed between the fin and the gate electrode; removing the mold layer to expose the source/drain portions of the fin disposed on opposite sides of the gate electrode; and implanting impurities through the top surface and the sidewalls of the source/drain portions of the fin to form source/drain regions.