Zhifang Li, Guangdong Huicheng Vacuum Technology Co., Ltd, Dongguan, Guangdong, China
Roll-to-roll (R2R) vacuum coating is a key manufacturing technology for scalable production of functional films, decorative coatings, and energy-related thin films, including composite current collectors, capacitor films, and flexible packaging materials. However, under wide-web and high-speed operating conditions, challenges such as gas cross-talk, substrate tension fluctuations, and process drift continue to limit film uniformity, defect control, and long-term process stability.
This paper presents an integrated roll-to-roll vacuum coating equipment and process solution developed to address these challenges in volume manufacturing environments. The system combines a differential pumping architecture with segmented web tension control and in-situ process monitoring. Through coordinated design of vacuum chamber zoning, web transport path, and tension distribution, gas interference and substrate instability under high-speed operation are effectively suppressed. In addition, real-time monitoring of deposition rate and critical process parameters enables dynamic adjustment and stabilization of the coating process.
Engineering results demonstrate that the proposed approach significantly improves film uniformity and run-to-run repeatability during continuous wide-web operation. The solution provides a practical pathway for enhancing yield and operational stability in industrial roll-to-roll vacuum coating production lines, supporting scalable manufacturing across a broad range of functional, energy, and packaging film applications.