Patent ID: 6284635
Filing Date: 2001-09-04
Classification: H01L

Abstract:
A method for forming a titanium polycide gate, comprising the steps of:forming a gate oxide and a doped polysilicon layer over the semiconductor substrate, in turn;implanting impurity ions into the doped polysilicon layer to form an amorphous phase silicon layer in a surface of the doped polysilicon layer;forming an amorphous phase titanium silicide layer over the amorphous phase silicon layer;carrying out heat-treatment to transform the amorphous phase titanium silicide layer into a crystalline phase titanium silicide layer and to transform the amorphous phase silicon layer into a crystalline phase silicon layer; andpatterning the crystalline phase titanium silicide layer, the doped polysilicon layer including the crystalline phase silicon layer and the gate oxide to form the titanium polycide gate.