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In this paper, we investigate the potentialities and properties of HfSiO/MG/cap/TiN gate stack devices, first by identifying the impact of the TiN thickness and its deposition procedure on the device characteristics, and by exploring the use of TaN vs. TiN as the 1st metal layer (MG). Deeper insight into the caps (e.g., Dy) diffusion mechanism is gained by: a) demonstrating stronger diffusion dependence...
We report, for the first time, a comprehensive study on various capping integration options for WF engineering in MuGFET devices with TiN gate electrode: HfSiO/cap/TiN, cap/HfSiO/TiN and HfSiO/TiN/cap/TiN vs. reference deposition sequence HfSiO/TiN (cap = Al2O3 for pmos, and Dy2O3 or La2O3 for nmos). We show that: 1) low-VT values (Lt 0.3 V) are achieved for both nmos and pmos, with excellent process...
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