Patent ID: 7436026

Claim:
A semiconductor device comprising: a semiconductor substrate; and at least one metal oxide semiconductor field-effect transistor (MOSFET) comprising spaced apart source and drain regions in said semiconductor substrate, a superlattice channel comprising a plurality of stacked groups of layers on said semiconductor substrate between said source and drain regions, and having upper surface portions being vertically stepped above adjacent upper surface portions of said source and drain regions, each group of layers of said superlattice channel comprising a plurality of stacked base semiconductor monolayers defining a base semiconductor portion and an energy band-modifying layer thereon, said energy-band modifying layer comprising at least one non-semiconductor monolayer constrained within a crystal lattice of adjacent base semiconductor portions, and at least some semiconductor atoms from opposing semiconductor portions being chemically bound together with the chemical bonds traversing the at least one non-semiconductor monolayer therebetween, the non-semiconductor selected from the group consisting of at least one of oxygen, nitrogen, fluorine, and carbon, and a gate overlying said superlattice channel.