First demonstration of high-Ge-content strained-Si1−xGex (x=0.5) on insulator PMOS FinFETs with high hole mobility and aggressively scaled fin dimensions and gate lengths for high-performance applications

For the first time, we report fabrication and characterization of high-performance s-Si
_1-x
Ge
_x
-OI (x~0.5) pMOS FinFETs with aggressively scaled dimensions. We demonstrate realization of s-SiGe fins with W
_FIN
=3.3nm and devices with L
_G
=16nm, in a CMOS compatible process. Using a Si-cap-free passivation, we report SS=68mV/dec and μ
_eff
=390±12 cm
²
/Vs at N
_inv
=10
¹³
cm
^-2
, outperforming the state-of-the-art relaxed Ge FinFETs. We also report the highest performance reported to date among sub-20nm-L
_G
pMOS FinFETs at V
_DD
=0.5V. In addition, hole transport as well as electrostatics, performance and leakage characteristics of SGOI FinFETs for various dimensions are comprehensively studied in this work.