Summary Based on the analysis, the following are observed:• Bubble found on modules after autoclave is located between OCA (EL)/POL interface. • Silicone bead with size around 4-4.5um is observed inside the bubble of • Extractable silicone coating of NG sample is also relatively higher as compared to OK, Type A and Type S samples. So, we suggest that ZX could do further analysis on EL silicone coating layer.