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　　Semiconductor refers to a material whose conductivity is between that of a conductor and an insulator at room temperature. Semiconductors are used in integrated circuits, consumer electronics, communication systems, photovoltaic power generation, lighting, high-power power conversion and other fields. For example, diodes are devices made of semiconductors. Whether from the perspective of technology or economic development, the importance of semiconductors is huge. The core units of most electronic products, such as computers, mobile phones, or digital recorders, are closely related to semiconductors. Common semiconductor materials include silicon, germanium, gallium arsenide, etc. Silicon is the most influential one in the application of various semiconductor materials.