Semiconductor
Semiconductor A semiconductor is a material that imparts current but only partially.Its conductivity lies between a conductor which has fully conductivity and an insulator which has negligible conductivity. Semiconductors can be pure elements such as silicon or germanium or compounds such as gallium arsenide or cadmium selenide.In a process called doping small amount of impurities are added to pure semiconductors causing large changes in the conductivity of the material. Doping Process The pure semiconductor is basically neutral.It contains no free electrons in its conduction bands.Even with the application of thermal energy.Only a few covalent bonds are broken yielding a relatively small current flow.A much more efficient method of increasing current flow in semiconductors is by adding very small amounts of selected additives to them generally no more...