Publications by authors named "Junyoung Yun"
Roll-to-roll (R2R) manufacturing depends on a system's capability to deposit high-quality coatings with precise thickness, width, and uniformity. Therefore, consistent maintenance requires the immediate and accurate detection of coating defects. This study proposes a primary color selection (PCS) method to detect edge defects in R2R systems.
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- Researchers are tackling the challenge of achieving uniform thickness in functional layers applied via roll-to-roll processing on PET film, as instability in the coating meniscus affects layer formation.
- They introduced an electrohydrodynamic (EHD) voltage application module to the slot-die coater to enhance the uniformity of thickness across the machine direction and stabilize the coating process.
- Experimental results showed that increasing voltage leads to a 64.5% reduction in thickness deviation and a production rate increase of up to 300%, demonstrating improved layer quality in large-area applications.