The Defectivity Line Control Engineer is responsible for controlling defectivity in semiconductor wafer fabrication through daily line monitoring, OOC management, tool excursion response, and cross-functional problem solving. The role supports both routine operations and improvement activities to ensure stable process performance, product quality, and effective industrialization. Key Responsibilities Analyze defect Pareto, defect maps, and characterization data to identify root causes and containment actions. Drive tool OOC reduction and lead sporadic defect reduction activities. Lead the troubleshooting of defectivity alert and involve in Material Review Board for material assessment and disposition. Support troubleshooting of defectivity alerts and escalation of critical issues. Work closely with process, equipment, device, quality, and production teams to drive defect reduction and line stability. Support technology transfer and industrialization activities to ensure smooth deployme...