Patent ID: 8809186
Filing Date: 2014-08-19
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: (a) forming a gate insulating film of an n-type MOS transistor over a semiconductor substrate; (b) after the step (a), forming a gate electrode of the n-type MOS transistor over the gate insulating film; (c) after the step (b), implanting first ions in the semiconductor substrate; (d) after the step (c), forming sidewalls over side surfaces of the gate electrode; (e) after the step (d), implanting second ions into the gate electrode and the semiconductor substrate, thereby the gate electrode becomes amorphous; (f) after the step (e), forming an insulating film in order to cover the gate electrode; (g) after the step (f), performing thermal processing in order to crystallize the gate electrode; (h) after the step (g), removing the insulating film; and (i) after the step (h), forming a silicide layer on a top surface of the gate electrode; (j) after the step (h), applying a tensile stress in a channel region of the n-type MOS transistor under the gate electrode, whereby a drain current of the n-type MOS transistor is improved by the stress.