Patent ID: 6721691
Filing Date: 2004-04-13
Classification: G01N,G03F

Abstract:
A method in integrated circuit metrology for adapting a library of metrology signals for use with different metrology systems, each of the metrology systems comprising a metrology hardware device with associated metrology hardware device parameters and a sample including a sample material with associated material parameters, the method comprising:specifying ranges for system parameters of a selected ideal metrology system, the system parameters comprising metrology hardware device parameters and material parameters; verifying that a first metrology system has system parameters within the specified system parameter ranges of the ideal metrology system; adapting a library of metrology signals functionally operative with the ideal metrology system to be functionally operative with tile first metrology system; and using the library of metrology signals to obtain profile data of integrated circuit structures; wherein hardware device parameters include one or more of angle of metrology beam incidence, numerical aperture, wavelength range, polarization, and noise.