Patent ID: 6514825
Filing Date: 2003-02-04
Classification: H01L

Abstract:
A method of forming a gate for a MOSFET device on a semiconductor substrate comprising the steps of:forming a sacrificial oxide layer on the semiconductor substrate; masking a pattern to form a thin gate region on the sacrificial oxide layer; selectively implanting nitrogen with a dosage of approximately 5.0Ã—1014 cmâˆ’2 -9.0Ã—1014 cmâˆ’2 into the thin gate region so that the implanted nitrogen is positioned within the semiconductor substrate; etching the sacrificial oxide layer to expose an upper portion of the semiconductor substrate; forming a gate oxide layer from the exposed upper portion of the semiconductor substrate; forming a polysilicon layer on top of the gate oxide layer; and masking and etching the polysilicon layer to form a gate electrode.