Patent ID: 7986403
Filing Date: 2011-07-26
Classification: G01N,G03F

Abstract:
1. A foreign substance inspection apparatus comprising: an irradiating unit configured to emit irradiating light to be obliquely incident on a reticle surface to be inspected to form a linear irradiation region on the reticle surface to be inspected; and first and second detecting units arranged on a same side as that provided with the irradiating unit with respect to the reticle surface to be inspected, the first and second detecting units configured to detect scattered light caused by a foreign substance on the reticle surface to be inspected, wherein the first and second detecting units are arranged at opposite positions with respect to a plane of incidence of the irradiating light, and wherein a longitudinal direction of the linear irradiation region is neither perpendicular nor parallel but inclined with respect to a side surface of the reticle other than the reticle surface to be inspected.