In advanced manufacturing fields such as electronics and optoelectronic packaging, the process requirements for functional medium coatings are becoming increasingly precise and complex. Traditional contact coating methods, such as screen printing and roll coating, can no longer meet film thickness control requirements. Conventional pneumatic spraying often suffers from oil mist, splashing, and other defects that impact yield.

To address these challenges, Quark-Tech has developed the DOT VM20 piezo spray valve series. Based on high-frequency piezoelectric drive and precision atomization technology, it provides a new solution for precision area coating.

High-Precision, High-Quality Precision Area Coating

The DOT VM20 uses piezoelectric drive technology. Compared to traditional pneumatic or screw-driven systems, it offers faster response speed and higher jetting frequency.

It supports flexible adjustment of nozzle atomization pressure, enabling precise positioning and stable, consistent dispensing volume while reducing clogging, dripping, excessive spraying, and oil mist.

Optimized specifically for area coating scenarios, the DOT VM20 can achieve single-pass coating with a width of less than 15mm and supports precision spraying with film thickness down to 20μm.

Additionally, to meet a wide range of application requirements, the DOT VM20 piezo spray valve currently supports various coating media with viscosities ranging from 1 to 3000 mPa·s. It has achieved precision spraying and validated application for flux, fluorinated liquids, conformal coating, inks, as well as various catalysts, solvents, and oil-based media.

Core Process Scenarios Across Multiple Vertical Industries

The DOT VM20 piezo spray valve has been deployed in electronics manufacturing, optoelectronic packaging, and photovoltaic cell applications, improving and addressing the precision and quality requirements that traditional contact coating and pneumatic spraying processes struggle to meet.

Display Screen: Silver Paste & Fluorinated Liquid Coating

Silver paste conductive layers and fluorinated liquid moisture-proof insulating layers are two important precision area coating processes in the display industry. Under high-yield requirements, display products are more sensitive to parameters such as film thickness uniformity, edge definition, and coating continuity for these coatings.

The DOT VM20 is optimized for display screen scenarios. It can flexibly adjust atomization pressure according to process requirements. The ±1% volumetric accuracy reduces film thickness unevenness caused by the flow of low-viscosity media such as fluorinated liquids. Meanwhile, the optimized flow channel structure reduces clogging and liquid accumulation during silver paste spraying, balancing yield requirements with efficiency.

Electronic Components: Conformal Coating Spraying

Against the backdrop of high integration and miniaturization of products, conformal coating spraying on various PCB surfaces demands higher coating uniformity and spraying precision, strictly avoiding oil mist and splashing issues. Conformal coating spraying is one of the most widely used applications of the DOT VM20.

It effectively avoids the splashing problems common in pneumatic spraying. For complex surface structures such as protrusions and grooves, it can also achieve uniform and complete encapsulation and coating, meeting long-term protection requirements.

Photovoltaic Panels: Flux Spraying

Driven by welding quality and efficiency, flux spraying processes in photovoltaic panel manufacturing are continuously maturing. Manufacturers are increasingly sensitive to film thickness consistency and coating boundary precision.

Deeply penetrating the photovoltaic and energy storage industry, the DOT VM20 has rapidly expanded and covered flux spraying scenarios for photovoltaic panels with its ±1% precision control and splash suppression capability. It effectively avoids excessive residue corrosion and insufficient flux causing cold solder joints, improving string welding yield.

Conclusion

The launch of the DOT VM20 piezo spray valve further completes Quark-Tech's product series in the precision spraying field. Beyond current core application scenarios, the DOT VM20 is continuously expanding into more advanced and complex process scenarios with its precision and quality advantages, providing reliable and efficient precision spraying solutions for more industries.