ADAPTIVE REAL TIME CONTROL OF A RETICLE/MASK SYSTEM

摘要

An adaptive real time thermal processing system is presented that includes a multivariable controller (260). Generally, the method (1600) includes creating a dynamic model of the thermal processing system (1630); incorporating reticle/mask curvature in the dynamic model; coupling a diffusion-amplification model into the dynamic thermal model; creating a multivariable controller; parameterizing the nominal setpoints into a vector of intelligent setpoints (1650); creating a process sensitivity matrix; creating intelligent setpoints using an efficient optimization method and process data; and establishing recipes that select appropriate models and setpoints during run-time.