Modelling of tunnelling currents in Hf-based gate stacks as a function of temperature and extraction of material parameters
Abstract
In this paper we show that through electrical characterization and detailed quantum simulations of the capacitance-voltage and current-voltage characteristics it is possible to extract a series of material parameters of alternative gate dielectrics. We have focused on HfO2 and HfSiXOYNZ gate stacks and have extracted information on the nature of localized states in the dielectric responsible for a trap-assisted tunneling current component and for the temperature behavior of the I-V characteristics. Simulations are based on a 1D Poisson-Schrdinger solver capable to provide the pure tunneling current and Trap Assisted Tunneling component. Energy and capture cross section of traps responsible for TAT current have been extracted.
Keywords
Cite
@article{arxiv.cond-mat/0609403,
title = {Modelling of tunnelling currents in Hf-based gate stacks as a function of temperature and extraction of material parameters},
author = {Andrea Campera and Giuseppe Iannaccone and Felice Crupi},
journal= {arXiv preprint arXiv:cond-mat/0609403},
year = {2009}
}
Comments
Preprint version of a paper submitted to TED, Transaction on Electron Devices. this is the final reviewed version. This work studies HfO2 and HfSiXOYNZ gate stacks, their C-V and I-V characteristics. A temperature dependent Trap Assisted Tunnneling model was developed to explain the temperature dependence of the I-V chaacteristics