Patent ID: 7727870
Filing Date: 2010-06-01
Classification: H01L

Abstract:
1. A method for forming a semiconductor device comprising: providing a substrate; forming a p-channel device and an n-channel device using the substrate, each of the p-channel device and the n-channel device comprising a source, a drain, and a gate, the p-channel device having a first sidewall spacer and the n-channel device having a second sidewall spacer; forming a liner over the p-channel device and the n-channel device; forming a tensile stressor layer over the liner; removing a portion of the tensile stressor layer from a region overlying the p-channel device; transferring a stress characteristic of an overlying portion of a remaining portion of the tensile stressor layer to a channel of the n-channel device; using the remaining portion of the tensile stressor layer as a hard mask, forming a first recess and a second recess adjacent the gate of the p-channel device; growing a semiconductor material in the first recess and the second recess; forming an un-doped semiconductor layer overlying the semiconductor material; and removing the remaining portion of the tensile stressor layer from a region overlying the n-channel device comprising etching the semiconductor device such that the first sidewall spacer is reduced in size compared with the second sidewall spacer.