The strain of Si1-x Gex (x=0.15) was controlled by oxidation temperature, time, and initial Ge fraction in underlying Si1-x Gex. Followed by oxidation and HF cleaning of Si1-x Gex, epi- Si1-x Gex (x=0.15) films were deposited on the Ge pileup layer, which is formed by the ultrahigh-vacuum chemical vapor deposition technique at 550°C. Through the X-ray rocking curve measurements and Raman scattering measurements, the strain-shift coefficient [b(x)] was evaluated. By using oxidized and etched Si1-x Gex for the substrate, the strain of deposited Si1-x Gex was changed from the partially relaxed to the tensile-strained state, a method for growing relaxed Si1-x Gex.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Materials Science(all)
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering