Patent ID: 7176534
Filing Date: 2007-02-13
Classification: H01L

Abstract:
1. A low-resistance T-gate MOSFET comprising: a Si-containing substrate comprising at least one device channel/body implant region separating a source region from a drain region, said at least one device channel/body implant region having a length of less than about 0.1 μm; a gate dielectric located at least atop said device channel/body implant region, said source region and said drain region; a T-gate located atop a portion of said gate dielectric, said T-gate comprises a recessed bottom polysilicon region and an upper gate conductor region, said upper gate conductor region has a width that is greater than a width of said bottom polysilicon region and comprises a lower polysilicon portion and an upper portion including one of Al, W, Cu, Ti and a silicide; and nitride spacers located on exposed vertical sidewalls of said bottom polysilicon region, said nitride spacers have an outer edge that is aligned with an outer edge of the upper gate conductor region.