Patent ID: 7833867
Filing Date: 2010-11-16
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising a Fin field effect transistor, the method comprising a sequence of step comprising: (1) preparing a semiconductor substrate; (2) forming an oxide film on a surface of the semiconductor substrate; (3) forming an isolation region in the semiconductor substrate; (4) forming a mask pattern on the entire semiconductor substrate except for the isolation region; (5) etching the oxide film away through the mask pattern as a mask to expose the semiconductor substrate; (6) forming a sacrifice oxide film on a part of the semiconductor substrate exposed in (5); (7) implanting impurity into the semiconductor substrate through the mask pattern as a mask; (8) removing the sacrifice oxide film to expose the semiconductor substrate; (9) forming a gate insulating film on the exposed semiconductor substrate; (10) forming a polysilicon film on the gate insulating film; (11) performing a CMP process on the polysilicon film through the mask pattern as a stopper; (12) forming a metal film on the polysilicon film; (13) reacting at least a part of the metal film with at least a part of the polysilicon film to silicidize the metal to form a gate electrode of said Fin field effect transistor; (14) removing the mask pattern; and (15) implanting impurity into the opposite sides of the semiconductor substrate across the gate electrode to form a source/drain region.