Cycle time advantages of mini batch manufacturing and integrated metrology in a 300 mm vertical furnace

In order to improve cycle time in the furnace area, two alternatives are evaluated. Mini batch manufacturing and integrated metrology can both save valuable time. Dynamic simulations are used to investigate the influence of both options. The results are a cycle time improvement when going front large batch to mini batch manufacturing. The gain is up to 40% for normal lots and up to 30% for hot lots wafers. The consequence is an increase in the number of required tubes. Cycle time improvement versus costs is analysed. The cost of one hour cycle time gain is determined. Integrated metrology can save approximately 5-10% on the average cycle time