Patent ID: 6306738
Filing Date: 2001-10-23
Classification: H01L

Abstract:
A method for modulating a gate polysilicon doping profile of a metal-oxide semiconductor field effect transistor, said method comprising the steps of:forming a gate on a substrate, the gate having a gate oxide layer formed on the substrate and an etched polysilicon layer formed on the gate oxide layer, the polysilicon layer having a top surface and opposed sidewalls;forming a photoresist mask on a first portion of the top surface of the polysilicon layer and to entirely cover one sidewall, the entire other sidewall and a second portion of the top surface, less than the first portion, being exposed; andperforming an angled ion implantation on the exposed sidewall and the exposed portion of the top surface of the polysilicon layer such that a doping profile of a region in the polysilicon layer adjacent the exposed sidewall and adjacent the gate oxide layer is unequal to a doping profile of a remainder of the polysilicon layer of the gate.