Patent ID: 7476857
Filing Date: 2009-01-13
Classification: H01J

Abstract:
1. A system for controlling a tool-to-tool matching between a plurality of scanning electron microscopes for pattern dimension measurement, comprising: a measuring unit for, at regular intervals, measuring a tool-to-tool disparity between scanning electron microscopes based on secondary electron image data, and, measuring indicators indicating states of said microscopes, said secondary electron image data being captured by imaging a reference wafer by use of said microscopes; a tool-to-tool-disparity causing factor analyzing unit for analyzing a relationship between said tool-to-tool disparity and the values of said indicators measured by said measuring unit to estimate a factor that has caused said tool-to-tool disparity, said indicators indicating said states of said microscopes; and an output unit for displaying and outputting said tool-to-tool disparity causing factor estimated by said tool-to-tool-disparity causing factor analyzing unit.