Application Of Ultrasonic Spray Coating Equipment in Printed Circuits

The key to choosing ultrasonic atomization equipment is its high precision, high efficiency, low loss, and wide adaptability. It addresses the core pain points of traditional spray processes (such as air spray, high-pressure airless spray, and blade coating) in terms of coating quality, material utilization, and applicable scenarios. It is particularly suitable for the precision manufacturing field with stringent coating requirements.

Ultrasonic atomization spray equipment has a wide range of important applications in printed circuit boards, including the following:

● Copper coating: During the copper coating process on PCBs, ultrasonic atomization spray equipment precisely and evenly applies conductive coating to the circuit board surface, forming a conductive layer that provides a good foundation for subsequent electroplating or electroless plating. It achieves efficient atomization of the coating, resulting in a uniform and consistent coating, avoiding the dripping and buildup common with traditional spraying methods, and improving the quality and stability of the PCB.

● Solder mask spraying: The solder mask is a critical protective layer on PCBs. Ultrasonic atomization spray equipment ensures uniform coverage of the solder mask, forming a dense protective film to prevent short circuits at solder joints. The equipment can precisely control the coating volume, adapting to PCBs of varying thicknesses and materials, and meeting the requirements for spraying complex patterns and fine lines.

● Character printing: Character printing on PCBs requires clarity and accuracy. Ultrasonic atomization spray equipment can achieve fine character printing, ensuring long-term readability, helping to improve PCB legibility and quality traceability.

● Flux Spraying: Ultrasonic atomization spray equipment is used for flux application during wave soldering processes. It is compatible with all fluxes, including rosin and water-soluble fluxes, and has a solids content of up to 37%. This equipment can reduce flux consumption by up to 80%, minimizing wasteful overspray and air pollution. The self-cleaning ultrasonic nozzle prevents clogging and requires no moving parts. It also offers excellent through-hole penetration for maximum top fill.

● Protective Coating Application: Ultrasonic atomization spray equipment can be used for the precise application of protective coatings such as conformal coatings. It can form a uniform protective layer between tiny components, under pins, and on complex structures, preventing component failure in humid, corrosive, or high-temperature environments. It is suitable for both selective coating and full-scale coating of large-area circuit boards.

● Photoresist Spraying: In the microelectronics and semiconductor fields, ultrasonic atomization spray equipment is used for the spraying of photoresist on silicon wafers. It can precisely control coating thickness and produce coatings ranging from 20 nanometers to tens of microns, meeting the stringent photoresist coating precision requirements of photolithography processes.