Patent ID: 7112498

Claim:
A method of forming silicide layers of a semiconductor device comprising: sequentially depositing a polysilicon layer, a buffer oxide layer, and a buffer nitride layer on a semiconductor substrate; forming a gate on the semiconductor substrate by removing some portion of the polysilicon layer, the buffer oxide layer, and the buffer nitride layer; forming sidewall spacers on the sidewalls of the gate; forming source and drain regions in the semiconductor substrate by performing an ion implantation process; forming a first silicide layer on the source and drain regions; depositing a first ILD layer over the semiconductor substrate including the gate and the first silicide layer; removing some portion of the first ILD layer to expose the top surface of the gate; forming a second silicide layer that covers the top of the gate and some portion of the sidewalls of the gate; and depositing a second ILD layer over the semiconductor substrate including the second silicide layer and the first ILD layer.