Patent ID: RE40138

Claim:
A method of fabricating a metal oxide semiconductor field effect transistor, (MOSFET), device, on a semiconductor substrate, comprising the steps of: forming a gate structure, overlying a gate insulator layer, on said semiconductor substrate; growing a first silicon oxide layer on said gate structure, and on the top surface of regions of said semiconductor substrate not covered by said gate structure; performing a first ion implantation procedure to form a lightly doped source/drain, (LDD), region, in an area of said semiconductor substrate not covered by said gate structure; depositing a second silicon oxide layer; performing a second ion implantation procedure to create a nitrogen region at the first silicon oxide-LDD interface; forming composite insulator spacers on the sides of said gate structure; performing a third ion implantation procedure to form a heavily doped source/drain region in an area of said semiconductor substrate not covered by said gate structure, or by said composite insulator spacers; and performing an anneal procedure.