Patent ID: 6756291
Filing Date: 2004-06-29
Classification: H01L

Abstract:
A method for repairing a damaged gate oxide layer while improving a gate oxide layer resistance to gate oxide degradation comprising the steps of:providing a silicon substrate having an overlying gate oxide layer and a polysilicon layer overlying the gate oxide layer; forming a polycide layer over the polysilicon layer; photolithographically patterning the polycide layer for dry etching a gate structure; dry etching a gate structure including etching through a thickness of the polycide layer including a fluorine and chlorine containing etching chemistry to produce implanted fluorine in the polycide layer; and, thermally annealing the silicon substrate including the gate structure to thermally diffuse the implanted fluorine to an interface region of the gate oxide layer and the silicon substrate to repair defects and improve a gate oxide layer resistance to degradation.