The ultrasonic selective flux coating system is an advanced, high-precision automated device designed specifically for the selective soldering process in electronics manufacturing. It replaces the traditional spray or foaming process used in wave soldering, as well as manual application methods.

The core principle is to use ultrasonic energy to atomize liquid flux into extremely fine particles (forming a fine mist or aerosol). This flux is then applied non-contact and selectively, under program control, through a precision nozzle or applicator to precisely and selectively apply it to specific areas of the printed circuit board (PCB) that require soldering, such as leads and pads of through-hole components, or solder joints of surface-mount devices (SMDs) that require localized soldering.

Advantages of Selective Flux Ultrasonic Coating Systems:

• Precisely applies flux to tiny, complex solder joints and pins, preventing contamination of non-solderable areas.
• Coating only the areas requiring soldering eliminates the significant flux waste associated with spraying or foaming (typically 70-90%).
• Flux residue is concentrated near the solder joints, away from sensitive areas, reducing the difficulty, cost, and environmental impact of subsequent cleaning.
• Automated, programmable control eliminates the variability of manual coating.
• Able to handle complex PCB designs with tall, densely packed components, shields, connectors, and other components that hinder traditional spray or wave soldering.
• Clogging of traditional foaming tanks or spray chambers, nozzle clogging (due to different atomization methods, high flux utilization, and slow impurity accumulation), and flux crystallization are avoided.
• Flux consumption is significantly reduced, directly reducing volatile organic compound (VOC) emissions.
• It is generally compatible with various types of no-clean and washable fluxes, including water-based and alcohol-based fluxes, and even certain low-solids solder pastes (for specialized applications). Integration into automated production lines increases speed and reduces manual intervention. Precision coating reduces soldering defects, lowers rework rates, and improves overall output.

Ultrasonic Coating Equipment Solutions from R&D through high volume production. Choose a product to learn more.

All of Cheersonic’s ultrasonic coating systems integrate Cheersonic ultrasonic nozzles, liquid delivery, and full system controls. Machines range from R&D tabletop systems, standalone fully enclosed programmable systems, and wide area continuous production inline systems.

The UAM series are general-purpose coating equipment, and the equipment parameters are standard parameters. If you want to know the equipment and parameters that are more suitable for your industry, you can click on the specific industries.

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