Germanium Source and Drain Stressors for Ultrathin-Body and Nanowire Field-Effect Transistors
2008
Pure germanium (Ge) source and drain (S/D) stressors are integrated with ultrathin-body (UTB) and nanowire field-effect transistors (FETs). This is the first report of the integration of Ge S/D stressors in FETs. The Ge S/D stressors induce a large compressive stress in the channel, resulting in up to 80% I Dsat enhancement in UTB-FETs. Electrical results further show that increased substrate compliance effects allow nanowire FETs to achieve even higher levels (96%) of strain-induced enhancement.
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