Carrier mobility and series resistance MOSFET modeling

Abstract

The scaling-down evolution of semiconductor devices will ultimately attend fundamental limits as transistor reach the nanoscale aria. In this context the MOSFET models must give the process variations and the relevant characteristics like current, conductance, transconductance, capacitances, flicker thermal or high frequency noise and distortion. The new challenge of nanotechnology needs very accurate models for active devices. The design of linear analog circuits lacks models for state-of-the-art MOS transistors to accurately describe distortion effects. This is mainly due to inaccurate modelling of the mobility degradation effect i.e. the dependence of carrier mobility in the inversion layer on the gate normal electric field. For short-channel devices the influence of series resistance becomes important and depends on the gate voltage. The drain current expression incorporating a new mobility relation obtained from quantum mechanical transport analysis and the series resistance influence is in good agreement with experiment.

Concept and Design of a Novel Compact Reactor for Autothermal Steam Reforming with Integrated Evaporation and CO Cleanup

“…For this reason, parallel-plate-based apparatuses with associated large volume-related heat-exchange areas have been intensively investigated. Parallel-plate arrays have been employed in photocatalytical processes, , reactive ion etching, and classical plate heat exchange. Several authors , have performed detailed calculations on plate apparatuses for hydrogen production by methane steam reforming, pointing out the benefits of the reactor principle regarding heat transfer.…”