Patent ID: 7022575
Filing Date: 2006-04-04
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a gate insulation film on a substrate, the substrate comprising a top surface portion made of silicon and the gate insulation film being disposed on the top surface portion; forming a gate electrode on the gate insulation film; forming a low impurity concentration region in the top surface portion adjacent the gate electrode; forming an insulation film to cover the gate insulation film and the gate electrode; dry-etching the insulation film so that the insulation film becomes thinner but still covers the gate insulation film and the gate electrode; removing by a first wet etching a portion of the insulation film that is on the gate electrode and another portion of the insulation film that is on a portion of the gate insulation film that is not covered by the gate electrode so as to form a spacer that is disposed on a side wall of the gate electrode; forming a silicon nitride film over an entire surface of the substrate having the gate electrode and the spacer thereon; forming a high impurity concentration region in the top surface portion adjacent the spacer so that the high impurity concentration region is deeper than the low impurity concentration region; removing by a second wet etching the silicon nitride film from the substrate in which the high and low impurity concentration regions are formed; forming a transition metal film over the substrate from which the silicon nitride film is removed; and inducing a chemical reaction between the transition metal layer and silicon so that a silicide layer is formed in the top surface portion of the substrate and another silicide layer is formed in a surface of the gate electrode.