Patent ID: 7095884
Filing Date: 2006-08-22
Classification: G01N,G03F,G06T,H01J

Abstract:
1. A circuit pattern inspection method of inspecting a pattern shape on the basis of two-dimensional distribution information of intensities of secondary electrons or reflected electrons obtained by observing a pattern formed on a substrate by a scanning microscope using a charged particle beam, comprising: a step of detecting a set of edge points indicative of positions of line edges of said pattern in a two-dimensional plane from said two-dimensional distribution information by a threshold method; a step of obtaining an approximation line for the set of edge points detected for each line edge by least square; a step of obtaining an edge roughness shape by calculating the difference between the set of said edge points belonging to each line edge and said approximation line; and a step of displaying correlation between edge roughness shapes of different line edges.