Discrete event simulation modeling for semiconductor fabrication operation

This research is to investigate simulation modeling method for semiconductor fabrication factories (FAB) that known for complex manufacturing operation from various the literatures. This paper covers literatures from various publications since past 10 years. The significant simulation model used in common and semiconductor fabrication will be selected for evaluation in semiconductor fabrication manufacturing operation scenario with high mixed. Depends to the products mixed configuration, cycle time to complete semiconductor fabrication will take 60 to 90 days. The longer period needed due to wafer process required 300 to 1000 steps, process re-entrance to similar equipment more than 30% of the total steps further increase the complexity with many configuration due to setup changes. The simulation also needs to configure for process queue time, process dedication, several of difference for equipment configuration, capability and capacity. Primary simulation techniques reviewed in this analysis are discrete event, petri-net, gaming, virtual, intelligent, monte carlo and hybrid to understand individual strength and common usage in the market. This research summarized the highest usage, most uses and compatibility in similar operation for semiconductor fabrication. In summary, the research concluded DES is the most suitable technique for simulating FAB operation because of its nature of queuing and leaving concept that fits and resulted to 95% accuracy for WIP forecasting.