Patent ID: 7429747

Claim:
A CMOS device with an NMOS portion and a PMOS portion, each of the NMOS portion and PMOS portion comprising: a nucleation layer on a substrate comprising aluminium antimonide; a first buffer layer on the nucleation layer comprising aluminium antimonide; a bottom barrier layer, the bottom barrier layer comprising aluminium indium antimonide; a quantum well channel on the bottom barrier layer, the quantum well channel comprising indium antimonide; a spacer layer on the quantum well channel; and a delta-doped layer on the spacer layer, the delta-doped layer in the NMOS portion comprising a different dopant than the delta-doped layer in the PMOS portion; a barrier layer on the delta-doped layer; and wherein the nucleation layer, and the buffer layer each consist of substantially the same materials in both the NMOS portion and the PMOS portion.