Pure silicon is an inherent semiconductor that performs the heating of electrons and electron holes emitted by atoms in the crystal. Pure silicon’s conductivity is very low, so it is not ideal for electrons as a circuit material and is doped with small amounts of other components.
By incorporating impurities into their crystal lattice, the conductivity of semiconductors can easily be changed. The method of adding regulated impurities is known as “doping” to a semiconductor. The degree of conductivity of the impurity, or dopant, applied to the intrinsic (pure) semiconductor varies.