Wafer Inspection Optical Mode Selection Using Layout Simulation

The patent creates virtual copies of wafers and defects through 3D modeling and simulation. Instead of repeatedly inspecting real wafers with real defects, the system generates virtual wafer models with simulated defects that replicate real-world scenarios. This allows optical parameter optimization to be performed on virtual copies rather than physical wafers, dramatically reducing inspection time while maintaining detection accuracy.

The system performs preliminary optimization of optical parameters through simulation before actual inspection. By pre-optimizing parameters using virtual wafer models and simulated defects, the system prepares optimal inspection settings in advance. This preliminary action eliminates the need for time-consuming repetitive inspections during production, as the parameters are already optimized before real wafers enter the inspection process.

The patent replaces physical testing of all parameter combinations on real wafers with virtual simulations. The system creates a virtual testing environment where computational models evaluate different optical parameter combinations against simulated defect data. This copying approach allows exhaustive parameter exploration without the time and resource constraints of physical experimentation, maintaining optimization precision while preserving productivity.

The system substitutes the mechanical inspection process with computational simulation. Instead of physically adjusting optical parameters and inspecting real wafers for each parameter combination, the patent uses software-based simulation to evaluate parameter effectiveness. This replacement of mechanical experimentation with computational analysis enables rapid parameter optimization without sacrificing detection accuracy, directly addressing the productivity-precision trade-off.