Abstract
The impact of the interfacial layer thickness on the low-frequency (LF) noise (1/f noise) behavior of n- and p-channel MOSFETs with high-kappa gate dielectrics and metal gates is investigated. Decreasing the interfacial layer thickness from 0.8 to 0.4 nm affects the 1/f noise in two ways. 1) The mobility fluctuations mechanism becomes the main source of 1/f noise not only on pMOS devices, as usually observed, but also on nMOS devices. 2) A significant increase of the Hooge's parameter is observed for both types of MOSFETs. These experimental findings indicate that bringing the high-kappa layer closer to the Si-SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> interface enhances the 1/f noise mainly due to mobility fluctuations
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