In-Situ Monitoring During Vacuum Drying
VCD is designed for processes where a wet film changes substantially during vacuum drying. As solvent is removed, film thickness and material properties can evolve. Monitoring the film during this transition provides information that a final-film measurement cannot provide by itself.
Measurement Functions : Dried-film thickness monitoring, Photoluminescence monitoring, Film evolution during vacuum drying, Optical process monitoring
Why Monitor the Drying Stage? : The wet-film thickness is only one point in the process. A coating may begin with the expected thickness but change during drying because of solvent removal, shrinkage, crystallization or other process effects. VCD provides an additional observation point between coating and finished-film inspection.
Typical Process : Wet Film → Vacuum Drying → Thickness / PL Monitoring → Final Film
Typical Applications : Perovskite PV, Vacuum drying, Thin-film crystallization studies, Process development, Pilot production, In-situ process monitoring
Process-Control Potential : VCD measurement can be incorporated into a broader process-control architecture where film measurements are correlated with drying conditions and final device performance.
