Patent ID: 7084990

Claim:
A method for measuring size and shape of fine patterns comprising the steps of: determining sizes and shapes of patterns which are formed on a substrate by processing the substrate in a predetermined fabrication process, through a first simulation by making a correspondence with stepwise variations in conditions of said fabrication process; determining, through a second simulation, intensity distributions of scattered light generated when a light beam is irradiated onto said fine pattern having the sizes and shapes determined through said first simulation and corresponding to the stepwise variations in conditions of said fabrication process; irradiating the light beam onto said fine patterns formed on the substrate by processing said substrate in said predetermined fabrication process; detecting a light beam scattered from said fine pattern under the irradiation; and determining size and shape of said fine pattern formed on said substrate by using information of the scattered light intensity distribution obtained through the detection, data of the scattered light intensity distributions determined through said second simulation, and data of the size and shape of said fine patterns obtained through said first simulation.