Integrated circuits are widely used in various electronic circuits, especially in various special-purpose, high-performance integrated circuits, which are used more and more.

•According to the processing signal, integrated circuits can be divided into analog integrated circuits and digital integrated circuits

•According to the manufacturing process, integrated circuits can be divided into semiconductor integrated circuits and thin film integrated circuits

•According to the conductivity type, integrated circuits can be divided into bipolar integrated circuits and unipolar integrated circuits

•According to the degree of integration, integrated circuits can be divided into small-scale integrated circuits, medium-scale integrated circuits, LSI and VLSI