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The CMOS integration of dual work function (WF) phase-controlled Ni fully silicided (FUSI) gates on HfSiON was investigated. For the first time, the integration of NiSi FUSI gates on n-channel MOS (NMOS) and Ni31Si12 FUSI gates on p-channel MOS (PMOS) with good Vt control to short gate lengths (LG=50 nm, linear Vt of 0.49 V for NMOS, and -0.37 V for PMOS) is demonstrated. A poly-Si etch-back step...
We report record unloaded ring oscillator delay (17ps at VDD = 1.1V and 20pA/mum Ioff) using low power CMOS transistors with Ni-based fully silicided (FUSI) gates on HfSiON. This result comes from two key advancements over our previous report presented in A. Lauwers et al. (2005). First, we have improved the (unstrained) devices Idsat to be 560/245muA/mum for nMOS/pMOS at an Ioff = 20pA/mum and V...
We demonstrate for the first time CMOS integration of dual WF (work function) metal gates on HfSiON using Ni-phase controlled FUSI. The novel integration scheme that we demonstrate uses our optimized 2-step Ni FUSI process (1) for simultaneous full silicidation of nMOS and pMOS, achieving different Ni/Si ratios on nMOS and pMOS by reduction of the pMOS poly height through a selective and controlled...
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