Patent ID: 6625513
Filing Date: 2003-09-23
Classification: G05B,Y02P

Abstract:
A method for minimizing run-to-rum variation of a semconductor processing tool, the method comprising:determining a goal of a process result sought to be produced by the tool; detecting an actual output of the process result from a most recent run of the tool according to an initial recipe; calculating a difference by subtracting the goal from the actual output; calculating a mirror image target by adding the difference goal; generating a suggested recipe from the mirror image target by comparing the mirror image target with a data library of prior process results and corresponding operational parameters, generating a subset of process results and corresponding operational parameters from the data library based upon a similarity with the mirror image target, and combining the operational parameters of the subset to produce the suggested recipe; and performing a subsequent of the tool utilizing the suggested recipe to produce a second actual output of the process result similar to the goal.