Carbon redistribution and precipitation in high temperature ion-implanted strained Si/SiGe/Si multi-layered structures
Anomalous carbon segregation in strained Si/SiGe/Si structures is demonstrated. Ion implanted C atoms are collected at the Si side and depleted at the SiGe side of the structure. Plate-like defects and thin carbon flakes are formed along Si/SiGe interfaces. Raman spectra include peaks at 1600 and 2700cm?1, associated with carbon-related phase. The concept of strain-enhanced separation of point defects and dopant precipitation is discussed.
carbon redistribution precipitates defects sisige heterostructures voids