Patent ID: 7453583
Filing Date: 2008-11-18
Classification: G01B,G03F,H01L

Abstract:
1. A program product stored on a computer-readable medium, which when executed, assesses a measurement system under test (MSUT) that measures a substrate having a plurality of structures, the program product comprising program code for performing the following: measuring a dimension of the plurality of structures using a reference measurement system (RMS) to generate a first data set, and calculating an RMS uncertainty (U short term precision variance, and V measuring the dimension of the plurality of structures using the MSUT to generate a second data set, and calculating a precision of the MSUT from the second data set; conducting a linear regression analysis of the first and second data sets to determine a corrected precision of the MSUT and a net residual error; determining a total measurement uncertainty (TMU) for the MSUT by removing the RMS uncertainty (U outputting the TMU to a system capable of optimizing the MSUT.