The role of semiconductors is to become component materials for information processing. At present, the core units of many electronic products in the world, such as computers, mobile phones, and digital tape recorders, use the changes in the conductivity of semiconductors to process information. Common semiconductor materials include silicon, germanium, gallium arsenide, etc., and silicon is the most influential in commercial applications among various semiconductor materials. Components and integrated circuits that can also be made from semiconductors are important basic products in the electronics industry.