Patent ID: 6548421
Filing Date: 2003-04-15
Classification: H01L

Abstract:
A method for forming a silicide of a metal with high-melting-point in a semiconductor device comprising the steps of:forming a gate electrode having sidewalls on both side surfaces of the gate electrode; then implanting impurity ions into a silicon substrate to form an impurity-implanted region; then heat-treating the silicon substrate to form an oxide layer on top of the impurity-implanted region; next etching the oxide layer for removal thereof by using a weak basic oxidant solution; after said etching step, heat-treating the impurity-implanted region to diffuse the impurity ions to form a heavily-doped source/drain region from the impurity-implanted region; subsequently depositing a metal with high-melting-point to form a metal layer on the heavily-doped source/drain region; and then heat-treating the metal layer for refractory-metal-silicification of the heavily-doped source/drain region.