Journal
SOLID-STATE ELECTRONICS
Volume 51, Issue 8, Pages 1101-1108Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sse.2007.06.002
Keywords
interface states; fermi-level pinning; MOS; conductance; capacitance; GaAs; III-V; germanium
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A straightforward methodology is presented to distinguish the presence of large amounts of interface traps causing weak Fermi-level pinning from other effects in MOS capacitors based on GaAs or other alternative semiconductors. This is done by using a simple extraction of a characteristic time constant. The observations for GaAs MOS capacitors are similar to those for Ge MOS capacitors. GaAs MOS capacitors using Ga2O3 and Al2O3 as gate dielectric were investigated and based on this methodology weak Fermi-level pinning due to interface traps was concluded for these devices. (c) 2007 Published by Elsevier Ltd.
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