Film capacitors are a type of double-layered device mainly used for charge storage. The structure of this device consists of a thin film layer deposited on a substrate, separated by a dielectric, with a variety of specifications and packaging sizes. It has a wide range of capacitance values, ranging from 0.05 pF to 500 mF, and a voltage range from 2.5 V to 100 V. The tolerance range varies from ±0.01 pF to ±5%. Film capacitors are widely used in electronic devices such as power supplies and filters.