Patent ID: 9645094
Date: 2017-05-09
CPC Classifications: G01J,G01N

Claim:
1. A defect inspection method comprising: an irradiation light adjustment step in which light emitted from a light source is adjusted into a luminous flux with a quantity of light, a position, a beam diameter and a polarization state; an irradiation intensity distribution control step in which the luminous flux obtained by the irradiation light adjustment step is led to a surface of a sample with an incident angle as required and an irradiation intensity distribution is formed on a region on the surface of the sample specified with an irradiation length longer in a first direction and an irradiation width shorter in a direction orthogonal to the first direction; a first sample scanning step in which the sample is displaced to a direction S a scattered light detection step in which the scattered light obtained internally from a region on the sample irradiated by the irradiation light through the irradiation intensity distribution control step at the first sample scanning step is imaged into a plurality of pixels and outputs an arrayed scattered light detection signal; a second sample scanning step in which the sample is displaced by a distance smaller than the irradiation length and a non-integer multiplication of a size of the plurality of pixels to a direction S a defect determining step in which a plurality of arrayed scattered light detection signals outputted at different positions in the direction S