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Abstract

A method for making a semiconductor device may include forming an insulating layer adjacent a substrate, forming a superlattice adjacent a semiconductor layer, and positioning the semiconductor layer adjacent a face of the insulating layer opposite the substrate. The method may further include forming a gate overlying the superlattice, and forming source and drain regions on the semiconductor layer so that the superlattice extends therebetween to define a channel. The superlattice may include a plurality of stacked groups of layers with each group of layers comprising a plurality of stacked base semiconductor monolayers defining a base semiconductor portion and an energy band-modifying layer thereon. The energy band-modifying layer may include at least one non-semiconductor monolayer constrained within a crystal lattice of adjacent base semiconductor portions.

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First Claim