Thin film capacitor is a kind of capacitor with excellent performance because of its many excellent characteristics. Its main characteristics are as follows: non-polarity, high insulation impedance, excellent frequency characteristics (wide frequency response), and low dielectric loss. Based on the above advantages, film capacitors are widely used in analog circuits. Especially in the part of signal interconnection, capacitors with good frequency characteristics and very low medium loss must be used to ensure that the signal is transmitted without too much distortion. Among all the plastic film capacitors, the characteristics of polypropylene (PP) capacitors and polystyrene (PS) capacitors are the most significant, of course, the price of these two capacitors is also relatively high. However, in order to improve the quality of sound, the parts materials used have become more and more advanced, and the price is not the most important consideration, so the frequency and quantity of PP capacitors and PS capacitors used in audio equipment are also increasing.

Thin film capacitors are mainly used in electronics, home appliances, communications, electric power, electrified railway, hybrid electric vehicles, wind power, solar power and other industries, the stable development of these industries has promoted the growth of thin film capacitors market.