Patent ID: 7927954
Filing Date: 2011-04-19
Classification: H01L

Abstract:
1. A method for fabricating a strained-silicon metal-oxide semiconductor transistor, comprising: providing a semiconductor substrate; forming a gate structure on the semiconductor substrate; forming a lightly doped drain in the semiconductor substrate after forming the gate structure; forming a spacer around the gate structure; forming a source/drain region in the semiconductor substrate surrounding the spacer; performing a first rapid thermal annealing process for activating the dopants within the source/drain region and the lightly doped drain; performing an etching process for forming a recess on the gate structure and the source/drain region surrounding the gate structure respectively; performing a selective epitaxial growth process for forming an epitaxial layer in each recess; and performing a second rapid thermal annealing process on the source/drain region and the lightly doped drain for redefining the distribution of dopants within the source/drain region and the lightly doped drain and repairing the damaged bonds within the dopants.