Patent ID: 8269969
Filing Date: 2012-09-18
Classification: G01B,G01N,H01L

Abstract:
1. A surface inspection device comprising: an illumination section which irradiates illumination lights on a surface of a semiconductor substrate having a plurality of layers; a detection section which detects diffracted lights from the surface of the semiconductor substrate on which the illumination lights are irradiated; and an inspection section which detects a change of a condition of a pattern on the surface of the semiconductor substrate based on information of the diffracted lights detected by the detection section, wherein the illumination section irradiates, on the surface of the semiconductor substrate, a first illumination light which falls on the surface of the semiconductor substrate at a first incidence angle with respect to a normal of the semiconductor substrate, and a second illumination light which falls on the surface of the semiconductor substrate at a second incidence angle different from the first incidence angle with respect to the normal of the semiconductor substrate; the detection section detects a first diffracted light caused by the first illumination light irradiated on the surface of the semiconductor substrate, and a second diffracted light caused by the second illumination light irradiated on the surface of the semiconductor substrate; and the inspection section detects the change of the condition of the pattern on the surface to which a correction is made for an influence from layers other than the uppermost layer, based on information of the first diffracted light and the second diffracted light detected by the detection section.