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A semiconductor is a silicon-based material that conducts electricity better than an insulator like glass but not as well as a pure conductor like copper or aluminum. The introduction of impurities, known as doping, can change their conductivity and other properties to match the unique needs of the electronic component in which they live. Semiconductors, often known as semis or chips, are used in a wide range of items, including computers, smartphones, appliances, gaming hardware, and medical equipment.