Realizing steep subthreshold swing with Impact Ionization Transistors

Recent developments in Impact Ionization Transistors (I-MOS) will be discussed here, including strained impact ionization transistors realized on the nanowire or multiple-gate device architecture. I-MOS devices achieve excellent subthreshold swings well below 5 mV/decade at room temperature. Techniques for enhancing impact ionization rate and reducing the breakdown voltage V_BD for device performance improvement will be discussed. Challenges faced by I-MOS will be highlighted. Some challenges may be addressed through the strain and materials engineering. Limitations of the I-MOS will also be discussed.