Patent ID: 8975582
Filing Date: 2015-03-10
Classification: G01N,G02B,H01J,H01K

Abstract:
1. A method for reviewing defects of a sample comprising the steps of: a first step for, on the basis of position information of defects on a surface of the sample placed on a table that can move in an X-Y plane, where the position information of the defects is previously detected and obtained by inspecting the surface of the sample by an other inspection system, driving the table and making the defects come into a viewing field on an optical microscope, and adjusting a focus of a detection optical system of the optical microscope onto the surface of the sample; a second step for re-detecting the defects by the optical microscope; a third step for correcting the position information of the defects on the basis of the position information of the defects re-detected at the second step; and a fourth step for reviewing ones of the defects whose position information is corrected at the third step by an electron microscope, wherein, at the second step, re-detecting is performed using reflection light or scattered light from the surface of the sample which passes an optical filter; wherein the optical filter includes a light shielding portion and a light transmitting portion, and wherein the detection optical system includes an integrated mirror arranged in the detection optical system in a manner to be moved with the detection optical system when the detection optical system is being moved to adjust its focal position, and wherein the method further includes receiving illumination at the integrated mirror from an illumination optical system of the optical microscope and radiating the received illumination, by the integrated mirror, onto the surface of the sample at an oblique angle to the surface of the sample.