Patent ID: 6218710
Filing Date: 2001-04-17
Classification: H01L,Y10S

Abstract:
A MOSFET (Metal Oxide Semiconductor Field Effect Transistor) device structure, with a metal silicide-polysilicon gate structure, comprised of an overlying, metal silicide gate, overhanging a narrower, underlying polysilicon gate, comprising:field oxide regions on the surface of a semiconductor substrate;a first device region between said field oxide regions;two, first polysilicon structures, each overlying a said field oxide region, and also overlying a portion of said first device region, adjacent to said field oxide regions, creating a second device region, free of said first polysilicon structures;a gate insulator layer on said second device region;insulator spacers located on the sides of each said first polysilicon structure;said polysilicon gate, overlying said gate insulator layer, on said second device region, between said insulator spacers on said first polysilicon structures;said metal silicide gate, wider in width then said polysilicon gate, overlying said polysilicon gate, overlying said insulator spacers on said first polysilicon structure, and overhanging a portion of underlying said polysilicon structures;source and drain regions in the surface of said semiconductor substrate, underlying said first polysilicon structures; andmetal contacts to said first polysilicon structures, and to said metal silicide-polysilicon gate structure.