The capacitor is a very common electronic component and plays a very important role in the circuit. In the manufacture of integrated circuits, capacitors are also very important components, with the following characteristics: 1. Storage charge: capacitor is a device that can store charge, there is an electric field between the two plates of the capacitor, if the voltage of the power supply is added to the two plates of the capacitor, it will form an electric field near the plate, the electrons in the electric field will be attracted to the plate, forming a charge distribution, this charge distribution can be called capacitance, good storage of electrical energy. 2. As a filter: capacitors can be used to remove noise signals in AC and filter circuits, and capacitors can also isolate two different parts of the circuit to prevent each other from affecting each other, thus playing a role in isolation. 3. As a current regulator: capacitors can also play a role in voltage regulation, according to the nature of the capacitor, in some circuits, if the capacitor power is insufficient, when charging the capacitor, the capacitor can stabilize the voltage at a suitable value through the voltage regulation current. 4. Used as a reference voltage source: In some circuits, capacitors can also be used as a reference voltage source. By charging and discharging the capacitor, the voltage is stabilized at the reference voltage value, which is used for the reference voltage or comparison voltage of the circuit. 5. Characteristic frequency: The capacitor has a characteristic frequency, in some circuits, if you need to filter and jointly reduce noise and other operations, you can use the characteristics of the capacitor, select a specific capacitor, so as to achieve a specific frequency range. In summary, capacitors play a very important role in the manufacture of integrated circuits. In various circuits, capacitors can play different roles, from the storage charge, filtering, reference voltage source and voltage regulation, etc., to provide necessary help for circuit work. Therefore, when designing integrated circuits, it is necessary to consider the selection of capacitors to ensure the stability and efficiency of the circuit.