Wafer Fab Yield Process Engineer

The Senior Wafer Fab Yield Engineer is responsible for driving systematic yield improvement across semiconductor wafer fabrication. This position analyzes manufacturing, inline metrology, defect, wafer-level electrical test, and process data to identify yield-loss mechanisms, determine root causes, and lead implementation of sustainable corrective actions.

The engineer serves as a senior technical resource connecting fab process performance to device and product yield. The role works cross-functionally with Process Engineering, Equipment Engineering, Process Integration, Product/Test Engineering, Failure Analysis, Quality, and Manufacturing to improve yield, reduce variability, and accelerate resolution of complex manufacturing problems.

Responsibilities:

• Lead wafer-fab yield improvement initiatives, identifying and prioritizing the dominant yield-loss mechanisms and converting analysis into actionable improvement projects.
• Analyze wafer probe maps, electrical test/bin data, inline metrology, defect inspection data, equipment/process history, and lot genealogy to isolate sources of systematic and random yield loss.
• Perform correlation, regression, statistical analysis, wafer spatial analysis, trend analysis, and other data-mining techniques to identify relationships between process conditions and electrical yield.
• Lead complex root-cause investigations involving process excursions, recurring yield degradation, wafer-level signatures, equipment effects, materials, and process interactions.
• Partner with Process and Equipment Engineering to translate yield signatures into physical process hypotheses and validate corrective actions.
• Define and execute structured experiments and DOE to validate suspected yield drivers and optimize process windows.
• Use SPC and process-capability analysis to identify process variation and opportunities for improved manufacturing control.
• Correlate WAT, wafer sort, inline process-monitoring, defect, and manufacturing data to identify yield improvement opportunities.
• Work with Failure Analysis teams to develop appropriate physical-analysis plans and translate findings into manufacturing actions.
• Develop analyses and engineering reports that clearly communicate yield trends, excursions, root causes, improvement opportunities, and project status.
• Lead cross-functional technical reviews for significant yield excursions and improvement programs.
• Support new-product and/or technology introduction by identifying yield risks, establishing baseline performance, and accelerating learning during manufacturing ramp.
• Mentor less-experienced engineers in statistical analysis, structured problem solving, yield analysis, and fab troubleshooting.
• Identify opportunities to improve fab-wide yield-analysis methods, data infrastructure, and problem-solving practices.

Function: Manufacturing
Experience Level: Mid-Senior Level