Patent ID: 8507337
Filing Date: 2013-08-13
Classification: H01L

Abstract:
1. A method for introducing species into a strained semiconductor layer, wherein said method comprising: a) providing in a reaction chamber a substrate comprising a first region comprising an exposed strained semiconductor layer and a second region comprising an exposed strained semiconductor layer, b) forming a conformal first species containing-layer by vapor phase deposition at least on the exposed strained semiconductor layer of the first region, and thereafter c) performing a first thermal treatment, thereby diffusing at least part of the first species from the first species-containing layer into the strained semiconductor layer of the first region and activating at least part of the diffused first species in the strained semiconductor layer of the first region, d) after diffusing the first species into the exposed strained semiconductor layer of the first region, forming a diffusion mask thereby covering the first region of the substrate, e) forming in a reaction chamber a conformal second species containing-layer by vapor phase deposition at least on the exposed strained semiconductor layer of the second region, and thereafter f) performing a second thermal treatment, thereby diffusing at least part of the second species from the second species-containing layer into the strained semiconductor layer of the second region, and activating at least part of the diffused first species and/or the diffused second species.