Linearity control system to maximize bottleneck in a rich product-mix foundry wafer fab

A production control strategy to maximize WlP arrival to bottleneck tool is being implemented in a foundry wafer fab. The technology spectrum and device mix is extremely wide that resulted in a non-linear arrival rate to the bottleneck tool at the back-end of line (BEOL). A production strategy to linearise the WlP into this bottleneck was studied and implemented through the shop-floor dispatch system. The results show 45% improvement to the original plan arrival rate