High Mobility TMD NMOS and PMOS Transistors and GAA Architecture for Ultimate CMOS Scaling

Transition metal dichalcogenide [TMD] 2D channel materials offer a unique opportunity for scaled transistor gate lengths below 10 nm to enable ultra-scaled polypitch. The significant scaling advantage of 2D materials is due to their high mobility values at sub-1 nm thickness, which thus far are experimentally reported to be lower than predicted. In this work, we present high-mobility 2D TMD NMOS and PMOS transistors using M0S2 and WSe
2
. A high-temperature MOCVD growth process achieves a hole mobility of 50 cm
²
/Vs, with PMOS ON-current of 247 μA/pm. We also report high-mobility M0S
2
NMOS with mobilities up to 45 cm
²
/Vs, along with the first reported TMD PMOS Gate-All -Around [GAA] transistor with SSlin~107mV/dec. Finally, we compare critically today’s 2D transistors to reference silicon transistors and discuss improvements needed to realize TMD’s potential as a replacement for Front-End-Of-Line (FEOL) silicon.