Mask Quality and Delivery
At UMC, providing the highest level of mask quality and shipping efficiency is our top-priority. Hence, all mask suppliers are carefully selected based on a solid qualification procedure. We build close partnerships with all suppliers and work with them to ensure incoming mask quality and on-time delivery. In addition, all masks at UMC are stored in a well-controlled environment to prevent any contamination that will impact mask quality. Besides storage environment control, UMC also performs regular mask inspections to monitor mask quality to extend lifetime.