Sono-Tek is the inventor and global leader in ultrasonic spray fluxing for printed circuit board (PCB) assembly. Since pioneering this technology, we have set the standard for high-precision coating application—enabling cleaner solder joints, maximizing top-side fillets, and reducing flux usage by up to 90%. Our systems are trusted worldwide for wave solder fluxing, selective solder fluxing, and are offered by nearly all leading OEM wave solder and selective solder machine manufacturers.
As the original inventor of ultrasonic spray fluxing, Sono-Tek has led the industry for decades with ultrasonic coating systems that deliver unmatched accuracy and repeatability. Our patented ultrasonic nozzle atomization applies flux uniformly across PCB boards and electronic components with precise control of flux coating thickness, significantly reducing overspray and eliminating maintenance issues caused by clogging. The result is cleaner assemblies with less flux residue, stronger solder joints, minimized maintenance, and maximized top-side fillet formation—critical for ensuring solder reliability on modern PCB designs and substrates.
Wave Solder Fluxing
Industry-proven systems for high-volume production lines, delivering uniform flux spray coating coverage, maximized top-side fillet quality, and dramatic reductions in flux consumption. Sono-Tek systems provide an exceptionally thin, uniform coating application with highly repeatable results for continuous operation.
Selective Solder Fluxing
Sono-Tek systems are purpose-built for selective soldering machines, providing highly controlled, localized flux deposition exactly where it’s required. Unlike jetting technology, our ultrasonic spray process eliminates flux splattering and ensures smooth, uniform coverage without clogging—even when applying high-solids rosin or OA fluxes. This precision improves solder joint reliability, reduces rework, and supports today’s increasingly complex PCB assemblies.
OEM Fluxing Partners
Sono-Tek’s ultrasonic technology is integrated by virtually all major wave solder machine manufacturers worldwide, making it the embedded standard in many top-tier soldering platforms. These integrations ensure seamless flux-coating application control, long-term reliability, and precision in high-volume PCB production environments.
Trusted by electronics manufacturers across the globe, Sono-Tek continues to lead spray fluxing innovation with solutions that deliver superior soldering results, measurable cost savings, and long-term reliability. Our expertise also extends to newer-generation low-viscosity conformal coating and related thin-film applications, where high precision, repeatability, and material efficiency are critical.