Dislocation stress memorization technique (dsmt) on epitaxial channel devices

Abstract

The present disclosure relates to a transistor device having epitaxial source and drain regions with dislocation stress memorization (DSM) regions that provide stress to an epitaxial channel region, and an associated method of formation. The transistor device has an epitaxial stack disposed over a semiconductor substrate, and a gate structure disposed over the epitaxial stack. A channel region extends below the gate structure between epitaxial source and drain regions located on opposing sides of the gate structure. First and second dislocation stress memorization (DSM) regions have a stressed lattice that generates stress within the channel region. The first and second DSM regions respectively extend from below the epitaxial source region to a first location within the epitaxial source region from below the epitaxial drain region to a second location within the epitaxial drain region. Using the first and second DSM regions to stress the channel region, improves device performance.