Ultrasonic spraying technology is regarded as an effective preparation process for thin film coating, such as photoresist coating on semiconductor circular surface. Compared with the traditional rotary coating process, ultrasonic spraying can produce a photoresist coating with better surface microstructure encapsulation and more uniform. The ultrasonic precision spraying system of Shanghai Yonge Technology provides surface coating solutions for semiconductor photoresist coating, PCB flux coating, functional coating of microelectronic sensors, etc.