Patent Document ID: 20070225851
Application ID: 11804998
Patent Status: 0

Claim One:
1. A method of evaluating the adequacy of a profile model of a wafer structure to be used for process control of a fabrication process to fabricate the wafer structure, the profile model including profile model parameters, the method comprising: a) selecting a profile model, wherein the profile model includes one or more profile model parameters to be measured in implementing one or more types of process control to be used in controlling the fabrication process; b) obtaining a measurement of one or more profile model parameters using a first metrology tool and the profile model selected in a), the first metrology tool being a scatterometer; c) obtaining a measurement of the one or more profile model parameters using a second metrology tool and the profile model selected in a); d) calculating one or more statistical metric criteria based on the measurements of the one or more profile model parameters obtained using the first and second metrology tools, wherein the one or more statistical metric criteria define an acceptable amount of variation in measurements obtained using the first metrology tool and the second metrology tool; e) when the calculated one or more statistical metric criteria are not within matching requirements, revising the profile model and iterating steps b) to e); and f) when the calculated one or more statistical metric criteria are within matching requirements, storing the profile model or the revised profile model.