Patent ID: 7684937

Claim:
An evaluation method of a semiconductor device, comprising the steps of; scanning a semiconductor device including a pattern with an electron beam irradiating thereon, detecting secondary electrons emitted from the semiconductor device or reflected electrons, and acquiring an information of a two-dimensional distribution of an intensity of the electrons; measuring positions of points constituting a boundary of the pattern at a constant interval of 10 nm or less along a longitudinal direction and at 2 μm or more along the longitudinal direction to generate roughness data of the pattern; discrete Fourier transforming the roughness data; and adding the square values of the absolute values of Fourier coefficients, acquired by the discrete Fourier transformation, within a predetermined range of frequency thereon, outputting an index representing characteristics of the pattern features, wherein the index is at least one or more values selected from among the total value of the square values, a square root of the total value, two times the square root of the total value, three times the square root of the total value, and six times the square root of the total value.