Thin film capacitors can be divided into high-voltage thin film capacitors, medium and low-voltage thin film capacitors and low-voltage thin film capacitors according to terminal voltage types. Among them, high-voltage high-capacity thin film capacitors are high-end products, that is, high-tech products applied to high-voltage and high-frequency scenarios such as new energy and industrial control. The core technology is mastered by Japanese and European and American manufacturers. In recent years, domestic manufacturers represented by Fara electronics began to enter the high-end market; The middle and low-end products are mainly used in lighting, home appliances and other traditional fields.

Thin film capacitor is an excellent capacitor because of its many excellent characteristics. Its main characteristics are as follows: non polarity, high insulation impedance, excellent frequency characteristics (wide frequency response), and small dielectric loss. Based on the above advantages, thin film capacitors are widely used in analog circuits. Especially in the part of signal intersection, capacitors with good frequency characteristics and extremely low dielectric loss must be used to ensure that there will not be too much distortion during signal transmission.

Its structure is the same as that of paper dielectric capacitor, and the medium is polyester or polystyrene. Polyester film capacitor, with high dielectric constant, small volume, large capacity and good stability, is suitable for bypass capacitor. Polystyrene film capacitor has low dielectric loss and high insulation resistance, but it has a large temperature coefficient and can be used in high-frequency circuits.

At present, thin film resistors are mainly concentrated in several major demand areas:

Take the demand for thin film capacitors of air conditioners, refrigerators and other household appliances as an example. The thin film capacitors in air conditioners are mainly used in motor starting and other circuit control parts. The increase in the penetration rate of variable frequency air conditioners will effectively drive the increase in the consumption of single film capacitors. In terms of the output of household appliances, the output of refrigerators and air conditioners in China will be stable at 90 million and 21 million in 2020-2021, and the market demand will be stable.

The second is the demand for thin film capacitors of new energy vehicles. In 2021, the global sales volume of electric vehicles (Bev and PHEV) will reach 6.75 million, a year-on-year increase of 108%, the global penetration rate of electric vehicles will reach 8.3%, and the output value of thin film capacitors in the field of new energy vehicles will be 450 yuan / vehicle. Based on the historical and predicted data of global new energy vehicle shipments, The overall market scale of thin film capacitors in the global new energy vehicle field will reach 4.5 billion yuan, 6 billion yuan and 8 billion yuan respectively.

In terms of the demand for PV and wind power thin film capacitors, the output value of PV and wind power thin film capacitors is about 6500 yuan / MW and 4500 yuan / MW respectively. Therefore, in combination with the global and China's new installed capacity demand for PV and wind power and the annual depreciation and replacement demand of 10% and 5%, it is expected that the overall market scale of global PV and wind power thin film capacitors will reach 2.6 billion yuan, 3.1 billion yuan and 3.6 billion yuan respectively in 2022-2024, The overall market scale of thin film capacitors in China's photovoltaic and wind power fields will reach 1 billion yuan, 1.1 billion yuan and 1.3 billion yuan respectively. From 2021 to 2024, the corresponding market scale CAGR of the world and China will be 16% and 17%.

Thin film capacitors have the characteristics of non polarity, high voltage resistance and self-healing ability. Therefore, they are widely used in traditional industries such as industrial control, energy-saving lighting and power grid construction, as well as emerging industries such as electronics, household appliances, wind power and new energy vehicles. According to the data of torch Electronics' 2019 semi annual report, the global capacitor market scale was US $20.9 billion by 2017. Among them, ceramic capacitors, aluminum electrolytic capacitors, thin film capacitors and tantalum capacitors accounted for 43%, 34%, 12% and 8% respectively. Therefore, the scale of the thin film capacitor market is about US $2.5 billion, of which China is the most important market.