Modification of Semiconductors
With respect to electronics devices to be designed,
semiconductors must be modified to get a wanted
electrical behaviour:
Selecting the semiconducting material, for
instance: Si, Ge, Se, ...
Forming of compounds, i.e. mixing elements of
the IIIrd group with elements of the Vth group.
Examples: GaAs, InP, ...
Doping of semiconductor, i.e. injecting different
materials (in low quantity) into the
semiconductor in order to increase the number
of free electrons (n-material) or the number of
free holes‡ (p-material).
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