Patent ID: 7433542
Filing Date: 2008-10-07
Classification: G01B,G03F,H01J

Abstract:
1. A method for measuring a periodic line and space pattern formed on a specimen, comprising the steps of: obtaining a specimen image at a magnification such as to include a plurality of line and space patterns by using a scanning electron microscope; differentiating an obtained image; calculating auto-correlation values of a differentiated image; figuring out at least one value of an average line width, an average space width, and an average pitch width of the above-mentioned line and space patterns from peak intervals of the auto-correlation values; and displaying the figured out at least one value, or storing the figured out at least one value, or sending the figured out at least one value, or using the figured out at least one value to design a line and space pattern, or using the figured out at least one value to fabricate a line and space pattern.