Patent ID: 7217657

Claim:
A method of forming a semiconductor device, the method comprising: providing a substrate having formed thereon a first and a second conductive silicon-containing region; forming a first resist mask for covering the second conductive silicon-containing region and exposing the first conductive silicon-containing region, said first resist mask having a top surface; depositing a first metal layer above the first conductive silicon-containing region and across the entirety of said top surface of said first resist mask; removing the first resist mask; forming a second resist mask for covering the first metal layer above the first conductive silicon-containing region and exposing the second conductive silicon-containing region, said second resist mask having a top surface; depositing a second metal layer above the second conductive silicon-containing region and across the entirety of said top surface of said second resist mask; removing the second resist mask; and heat-treating the substrate to form a first silicide portion in the first conductive silicon-containing region and a second silicide portion in the second conductive silicon-containing region.