Patent ID: 8045146

Claim:
An apparatus for reviewing a defect, comprising: a vacuum chamber; a stage provided in the vacuum chamber; an optical microscope configured to optically re-detect an existing defect on a sample placed on the stage, the existing defect being previously detected by an external optical inspection apparatus, and configured to obtain position information of the existing defect on the sample; a correction means configured to correct position information of the existing defect on the sample, the existing defect being previously detected by the external optical inspection apparatus, the position information correction being based on the position information obtained by optical re-detection of the existing defect on the sample by the optical microscope; and a scanning electron microscope configured to review the existing defect on the sample by positioning the existing defect on the sample within a visual field of the scanning electron microscope by moving the stage based on the position information of the existing defect corrected by the correction means; wherein the optical microscope includes: an optical height detection system configured to optically detect a vertical position of an upper surface of the sample placed on the stage; an illumination optical system configured to illuminate the existing defect on the sample with light; an image detection optical system configured to converge and detect reflected light or scattered light generated from the existing defect on the sample illuminated by the illumination optical system, and to obtain an image signal; and a focus adjusting means configured to adjust a focus position of the optical microscope based on the vertical position of the upper surface of the sample, the vertical position being detected by the optical height detection system; and wherein the optical height detection system, the illumination optical system, and the image detection optical system all use a common objective lens to detect an existing defect on the sample in the same location where the height is detected.