SiGe Channel CMOS: Understanding Dielectric Breakdown and Bias Temperature Instability Tradeoffs
2019
Breakdown and bias temperature instability for n/pFETs are studied on a wide composition of SiGe channels on different strain relaxation buffers. This study represents the first in-depth look at AC/DC PBTI trends of low Ge% SiGe nFinFETs. Dielectric breakdown is shown to be largely independent of channel composition over the region studied. Finally, we calculate the end-of-life performance benefit compared to Si, demonstrating the potential benefit of CMOS SiGe as a technology element.
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