Patent ID: 7569442

Claim:
A method of preparing a lateral channel for a field effect transistor comprising: providing a substrate having a single crystal silicon region doped p-type; forming a dummy gate on a first portion of the single crystal silicon region; forming recessed portions of the substrate having the single crystal silicon region adjacent to the dummy gate to be vertically offset from the first portion of the substrate having the single crystal silicon region; forming spaced apart strained Si 1−y C y epitaxial regions on the recessed portions of the substrate and within the single crystal silicon region; doping said strained Si 1−y C y epitaxial regions n-type to a concentration level greater than 1×10 19 cm −3 ; removing the dummy gate; forming a silicon region over said strained Si 1−y C y epitaxial regions that are present on the recessed portions of the substrate, and the single crystal silicon region; and forming a gate stack on the silicon region.