Patent ID: 7592686
Filing Date: 2009-09-22
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a protrusion extending from a substrate, the protrusion including an upper portion and a lower portion; and a selective epitaxial growth (SEG) layer surrounding the upper portion of the protrusion and including at least one gap that exposes a sidewall of a channel region of the protrusion, wherein: the protrusion includes a recess therein, the recess being aligned with the gap, the recess extends through the upper portion and into the lower portion, and a width of a first section of the upper portion of the protrusion is less than a width of a first section of the lower portion of the protrusion, the first section of the upper portion of the protrusion corresponding to the recess and being directly above the first section of the lower portion of the protrusion.