Abstract
The strained-Si:C long channel MOSFET on a relaxed SiGe buffer is demonstrated in this study. The extracted electron mobility showed an enhancement of ~40% with the incorporation of 0.25% carbon in strained-Si long channel NMOSFETs. However, no improvement was seen in the output characteristics of the strained-Si:C PMOSFET. The performance enhancement seen is less than the theoretical prediction for increasing carbon content; this is due to the high alloy scattering potential with carbon incorporation, high interface state density (D it) at the oxide/strained-Si:C interface and interstitial carbon induced Coulomb scattering. However, increased amounts of C may result in degraded device performance. Therefore, a balance must be struck to minimize C-induced extra Coulomb and alloy scattering rates in the fabrication of these devices.
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