3.1 The Metal-Semiconductor Junction - Introduction
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3.1 The Metal-Semiconductor Junction - Introduction
Metal-to-semiconductor contacts are of great importance since
they are present in every semiconductor device. They can behave
either as a Schottky1 barrier or as an ohmic contact dependent on the
characteristics of the interface. This chapter contains an analysis of
the
electrostatics of the M-S junction (i.e. the charge, field and
potential distribution within the device) followed by a derivation of
the current voltage characterisitics due to diffusion, thermionic emission
and tunneling and a discussion of the non-ideal effects in
Metal-Semiconductor
junctions.
1Named after Walter Schottky
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© Bart Van Zeghbroeck 1997