Numerical Analysis Of The Influence Of Deep
Energy Level Traps In SiC Schottky Structures
Author(s)
A. Koel, T. Rang & G. Rang
Abstract
The Thomas Johann Seebeck Department of Electronics at the Tallinn University
of Technology has studied the properties of Schottky contacts since the 1980s.
The theoretical studies have been accompanied by analytical and numerical
computer simulations. Realisation of SiC complementary power Schottky diodes
has been possible since 1994, using diffusion welding (DW) metallisation
technology. Measurement of the electrical properties of the produced samples
offers excellent possibility to verify and enhance computer models, and as
feedback provides possible explanations to phenomenon found in the
measurement results.
This paper provides a comparison between measured and simulated results
for SiC Schottky power diode structures. The paper addresses the simulation
results investigating the influence of deep energy traps and/or defects on
electrical characteristics of SiC Schottky diodes manufactured using DW
metallisation technology. The numerical model includes the exact model for
describing the behaviour of deep energy traps in the epitaxial layer. The analysis
takes into account the influence of ambient temperature on static characteristics
of the device. The outcome of this particular research is addressed for the
optimisation of the switching devices applied in the power converters, with the
aim of reducing the general energy consumption in different power grids.
Keywords: silicon carbide, metal semiconductor contacts, diffusion welding,
interface layer, deep energy levels, DLTS method, numerical modelling, Schottky
diodes.
Keywords
silicon carbide, metal semiconductor contacts, diffusion welding,
interface layer, deep energy levels, DLTS method, numerical modelling, Schottky
diodes.
Related Book
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