The conductivity of semiconductors increases with increase in temperature. The most popularly used semiconductor materials are Silicon and Germanium. Most electronic devices are fabricated by using semiconductor materials alongwith conductors and insulators.Silicon is the most common material used to build semiconductor devices.
• Si is the main ingredient of sand and it is estimated that a cubic mile of seawaterThe semiconductor materials are used for specialized applications. The Gallium Arsenide (GaAa) and related compounds are used for high speed devices and optical devices.
contains 15,000 tons of Si.
• Si is spun and grown into a crystalline structure and cut into wafers to make