Abstract
The effectiveness of amorphous metal gate (MG) in suppressing low-frequency noise (LFN) for FinFETs has been thoroughly investigated. It was demonstrated that the amorphous TaSiN MGs with various atomic compositions provide flexible tuning of threshold voltage (V t ) as well as small V t variability, namely AVt. It was found that the TaSiN-MG FinFETs exhibit drastic reduction of LFN in comparison to the poly-crystalline TiN MG case. Modelling by 3D-TCAD reveals that work function variation (WFV) of the MG has a significant impact on LFN generation. Suppression of A Vt and LFN is highly beneficial to conduct further scaling of analog/digital components in SoC.
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