Patent ID: 7525651
Filing Date: 2009-04-28
Classification: G01N,G03F

Abstract:
1. A pattern profile inspection apparatus for detecting a profile error of at least one pattern having a cross section with a projection and a recess, the inspection apparatus comprising: a plate on which the pattern is mounted; a light source which can change an angle of illuminating light to the pattern within a range of 15 to 75 degrees with reference to a top surface of the pattern; and a photodetector which can receive reflected light from the pattern at an angle within a range of 15 to 75 degrees with reference to the top surface of the pattern, wherein the profile error of the pattern is detected based on an amount of the reflected light which is received by the photodetector, from an edge between the top surface and a side surface of each of the patterns, wherein when the edge has a surface area of the pattern having the profile error, the amount of the reflected light received by the photodetector is greater than an amount of reflected light for the edge of the pattern not having the profile error.