A cost effective 32nm high-K/metal gate CMOS technology for low power applications with single-metal/gate-first process

Abstract

For the first time, we have demonstrated a 32nm high-k/metal gate (HK-MG) low power CMOS platform technology with low standby leakage transistors and functional high-density SRAM with a cell size of 0.157 μm2. Record NMOS/PMOS drive currents of 1000/575 μA/μm, respectively, have been achieved at 1 nA/μm off-current and 1.1V Vdd with a low cost process. With this high performance transistor, Vdd can be further scaled to 1.0V for active power reduction. Through aggressive EOT scaling and band-edge work-function metal gate stacks, appropriate Vts and superior short channel control has been achieved for both NMOS and PMOS at L gate=30nm. Compared to SiON-Poly, 30% RO delay reduction has been demonstrated with HK-MG devices. 40% Vt mismatch reduction has been shown with the Tinv scaling. Furthermore, it has been shown that the 1/f noise and transistor reliability exceed the technology requirements. © 2008 IEEE.