Impact of Fin Sidewall Taper Angle on Sub-14 nm FinFET Device Performance

Recent advances in FinFET technology include fins with tapered sidewalls in addition to conventional vertical sidewall fins. Our 3-D TCAD simulation results suggest that for low to moderately doped fins, vertical sidewall fins have superior electrical performance. Only at extremely high fin doping concentrations could tapered sidewall fins be electrically beneficial.