Image sensors have become a cornerstone of today’s consumer electronics, powering smartphone cameras, automotive vision systems, and industrial inspection tools. As demand for higher pixel density and better optical performance continues to grow, packaging quality has become as important as the sensor design itself. One of the critical factors in ensuring stable performance is adhesive dispensing consistency during assembly.

In image sensor packaging, adhesives are used for lens bonding, module sealing, and structural reinforcement. Inconsistent dispensing—whether excess glue or insufficient coverage—can lead to optical misalignment, moisture intrusion, or long-term reliability issues. Maintaining repeatable adhesive volume, especially with medium-to-high viscosity materials or particle-filled compounds, is a major challenge for manufacturers.

Why Consistency Matters in Adhesive Dispensing

Unlike general electronics, image sensors are highly sensitive to any form of assembly deviation:

• Optical Clarity – Overflow or uneven adhesive can obstruct the light path.
• Mechanical Stability – Insufficient glue volume weakens module bonding, affecting durability.
• Process Yield – Irregular dispensing leads to higher rework and scrap rates.

For mass production lines, even a small percentage of inconsistency can translate into significant cost and performance losses.

Screw Valve Technology for Image Sensor Applications

The KSV1000 concentric screw valve series offers a solution designed to maintain adhesive consistency across diverse packaging conditions:

• Servo-Driven Precision – Equipped with a closed-loop servo motor, the valve ensures dispensing repeatability up to 98%, delivering glue volumes as low as 0.1 µl with stability.
• Adaptable Flow Control – Different screw specifications match varying viscosity levels and particle sizes, ensuring smooth and consistent flow.
• Negative Pressure Regulation – Helps prevent dripping and ensures clean cut-off, reducing glue drawing or stringing.
• Durable Materials – Tungsten steel screws provide wear resistance when dispensing abrasive, particle-filled adhesives.
• Quick Maintenance – A modular, quick-release design enables fast cleaning and cartridge changes, minimizing downtime.

These features make screw valves particularly effective for applications like lens bonding, optical alignment, and sensor sealing—areas where consistency directly impacts optical performance.

The Taiwan Perspective

Taiwan plays a central role in the global image sensor supply chain, with many packaging houses serving consumer electronics and automotive markets. For these manufacturers, achieving repeatable adhesive dispensing without sacrificing throughput is essential to meet international quality standards. By integrating screw valves into production lines, factories in Taiwan can handle a wide range of adhesives—from UV glue to thermal pastes—while ensuring stable process control.

This not only supports the growing demand for advanced camera modules but also strengthens Taiwan’s position as a key partner in next-generation imaging technologies.

Conclusion

In image sensor packaging, consistency is reliability. Screw valves, with their ability to precisely meter adhesives of varying viscosities, provide a dependable solution for ensuring uniform glue volume. For manufacturers aiming to minimize defects and maximize yield, adopting advanced dispensing systems like the KSV1000 series offers a practical path forward—delivering both precision and scalability.