Patent ID: 7372062
Filing Date: 2008-05-13
Classification: G01N

Abstract:
1. A defect inspection device comprising: an illumination section that irradiates a specimen with a band of illumination light having a variable incident angle; and a light-receiving section including a line sensor which receives light from the specimen irradiated with illumination light from the illumination section with a variable detection angle, wherein the specimen has a regular pattern on a surface at a side facing the light-receiving section, wherein the illumination section and the light-receiving section rotate around a rotational axis that includes an intersection point at which an optical axis of the illumination section, an optical axis of the light-receiving section, and a surface at the light-receiving section side of the specimen intersect, and wherein the light-receiving section receives diffracted light emitted in substantially a same direction as a direction of incidence of the illumination light from the illumination section.