Polarsemi · Bloomington, MNPrepare for this interview
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Role Summary The Senior Staff / Principal Process & Defect Engineer is responsible for driving defect reduction, process development, and cross-functional project execution across wafer fabrication operations. This role owns defect strategy, excursion response, and process improvement initiatives, while partnering with integration, equipment, and operations teams to improve yield, stability, and manufacturability. Defect Engineering & Yield Ownership Own defect performance across assigned process areas (FEOL/BEOL integration loops) Lead defect excursion response, lot disposition (MRB / ICAR support), and root cause analysis Drive defect reduction strategy using Pareto, correlation, and signature mapping Define monitoring strategies (KLA / inspection layers) and OCAP triggers Process Development & Optimization Design and execute DOE experiments and split lot analysis Optimize inspection strategies, recipes, and tool conditions Develop Best Known Methods (BKM) Support new process introduction and evaluate defect risks Cross-Functional Project Leadership Lead multi-discipline yield and defect reduction projects Coordinate across process, equipment, operations, and defect teams Drive project execution, timelines, and technical deliverables Present findings and recommendations to leadership Defect Metrology & Tool Strategy Own defect inspection tools (KLA, SEM) Develop inspection recipes and sensitivity optimization Ensure tool matching and data consistency Translate defect signatures into process actions Manufacturing Support & Continuous Improvement Support fab operations and escalation response Improve communication and passdown structure Standardize defect workflows and documentation Identify improvements for cycle time and efficiency
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