Patent ID: 6987062

Claim:
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 layer of a gate electrode material on the gate insulation film; forming a gate cover insulation film on the layer of the gate electrode material; forming a gate electrode by patterning the layer of the gate electrode material and the gate cover insulation film; injecting a low dose of a first impurity of a first conductivity type into the substrate using the gate electrode as a mask; forming a first insulation film over the substrate dosed with the first impurity; forming a second insulation film on the first insulation film; dry-etching the second insulation film to leave only a portion of the second insulation film that is on a side wall of the gate electrode, the left portion of the second insulation film working as a spacer and being disposed on a portion of the first insulation film covering the side wall of the gate electrode; injecting a high dose of a second impurity of the first conductivity type into the substrate having the spacer; removing by a first wet etching a portion of the first insulation film that is on the gate cover insulation film of the gate electrode and another portion of the first insulation film that is on a portion of the gate insulation film that is not covered by the gate electrode; removing by a second wet etching the spacer, the portion of the gate insulation film that is not covered by the gate electrode and the gate cover insulation film of the gate electrode; forming a transition metal film over the substrate from which the spacer 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 layer of the gate electrode material.