Semiconductor device comprising a superlattice channel...

Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode

Reexamination Certificate

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C257S346000, C257S408000, C257S018000, C257S020000

Reexamination Certificate

active

07436026

ABSTRACT:
A semiconductor device may include a semiconductor substrate and at least one metal oxide semiconductor field-effect transistor (MOSFET). The at least one MOSFET may include spaced apart source and drain regions in the semiconductor substrate, and a superlattice channel including a plurality of stacked groups of layers on the semiconductor substrate between the source and drain regions. The superlattice channel may have upper surface portions vertically stepped above adjacent upper surface portions of the source and drain regions. Each group of layers of the superlattice channel may include 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. The at least one MOSFET may additionally include a gate overlying the superlattice channel.

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