Optics: measuring and testing – Shape or surface configuration
Reexamination Certificate
2006-07-04
2006-07-04
Rosenberger, Richard A. (Department: 2877)
Optics: measuring and testing
Shape or surface configuration
C356S237500, C356S625000
Reexamination Certificate
active
07072049
ABSTRACT:
A wafer structure profile is modeled by determining one or more termination criteria. A determination is made as to whether a wafer structure includes at least one layer having three or more materials alone a line within the at least one layer. An optical metrology model for the wafer structure is created, where three or more materials are incorporated in the model for the at least one layer having three or more materials. A set of diffraction signals is simulated using the optical metrology model. The set of simulated diffraction signals and a set of diffraction signals measured off of the wafer structure are used to determine if the one or more termination criteria are met. The optical metrology model is modified until the one or more termination criteria are met.
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UK Search Report mailed on Jul. 21, 2004, for UK patent application No. GB 0402260.4 filed on Feb. 2, 2004, 2 pages.
Jakatdar Nickhil
Niu Xinhui
Morrison & Foerster / LLP
Rosenberger Richard A.
Timbre Technologies, Inc.
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