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Low Density of Near-Interface Traps at the Al2O3/4H-SiC Interface with Al2O3 Made by Low Temperature Oxidation of Al
Science Institute, University of Iceland, IS-107 Reykjavík, Iceland.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering. Science Institute, University of Iceland, IS-107 Reykjavík, Iceland.
Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Göteborg, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
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2017 (English)In: Silicon Carbide and Related Materials 2016, Trans Tech Publications Ltd , 2017, Vol. 897, p. 135-138Conference paper, Published paper (Refereed)
Abstract [en]

We report on a very low density (<5×1011 cm-2) of near-interface traps (NITs) at the Al2O3/4H-SiC interface estimated from capacitance-voltage (CV) analysis of MOS capacitors at different temperatures. The aluminum oxide (Al2O3) is grown by repeated deposition and subsequent low temperature (200°C) oxidation for 5 min of thin (1-2 nm) Al layers using a hot plate. We refer to this simple method as hot plate Al2O3. It is observed that the density of NITs is significantly lower in the hot plate Al2O3 samples than in samples with Al2O3 grown by atomic layer deposition (ALD) at 300°C and in reference samples with thermally grown silicon dioxide grown in O2 or N2O ambient.

Place, publisher, year, edition, pages
Trans Tech Publications Ltd , 2017. Vol. 897, p. 135-138
Series
Materials Science Forum
Keywords [en]
Gate Dielectrics, Aluminum Oxide, Interface States, Near-Interface Traps (NITs)
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-160907DOI: 10.4028/www.scientific.net/MSF.897.135Scopus ID: 2-s2.0-85020132120OAI: oai:DiVA.org:liu-160907DiVA, id: diva2:1360839
Conference
11th European Conference on Silicone Carbide & Related Materials, Halkidiki, Greece, 25-29 September, 2016
Available from: 2019-10-14 Created: 2019-10-14 Last updated: 2019-10-24Bibliographically approved

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Sveinbjörnsson, Einarul-Hassan, JawadKarhu, RobinJanzén, Erik

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Sveinbjörnsson, Einarul-Hassan, JawadKarhu, RobinJanzén, Erik
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