Patent ID: 6894790

Claim:
A micropattern shape measuring system comprising: a measuring mechanism emitting an electron beam; a measuring mechanism emitting a light beam; a storage unit for storing widths of a plurality of patterns formed in a test pattern place in a scribe line area of a wafer formed to divide the wafer into a plurality of semiconductor devices, said widths being obtained by irradiating the plurality of patterns with the light beam, and widths of the plurality of patterns obtained by irradiating the plurality of patterns with the electron beam; and a calculation unit for calculating an amount of change in width of each of the plurality of patterns caused while being irradiated with the electron beam, and from the width of a dummy pattern formed in a semiconductor device, which is measured by irradiating the dummy pattern with the electron beam, and from said amount of width change, calculating a width which the dummy pattern should have had before the dummy pattern is irradiated with the electron beam, and wherein said calculator unit calculates the amount of change in width of each of the plurality of patterns by comparing the widths measured by the light beam to the widths measured by the electron beam.