Patent ID: 9602780
Date: 2017-03-21
CPC Classifications: G01N,H01L,H04N

Claim:
1. Apparatus for inspecting a defect with time spatial division optical system, the apparatus comprising: an illumination optical system for radiating light to the sample; a detection optical system for detecting light from an illuminated area illuminated by the illumination optical system, wherein the detection optical system is an imaging system; a sensor for carrying out photoelectrical conversion on the light detected by the detection optical system; and a processing section for detecting the defect by making use of a detection result output by the sensor, wherein the illumination optical system further includes a temporal/spatial-division optical system for creating on the sample a plurality of illuminated areas which are temporarily and spatially divided, wherein a distance between any two adjacent ones of the illuminated areas on the sample is such a distance that Gauss profiles of the two adjacent ones overlap, and a result of the overlap is substantially flat on the side of the sensor if the two adjacent ones are illuminated at the substantially same time, and wherein a distance between any two areas illuminated at the substantially same time is larger than resolution of the detection optical system.