Patent ID: 8934092
Filing Date: 2015-01-13
Classification: G01N

Abstract:
1. A surface defect inspection apparatus comprising: an illumination optical system that linearly irradiates a beam on a surface of an inspection sample to form a linear illumination region on the inspection sample surface, wherein the linear illumination optical system is configured to irradiate the beam at a same region of the inspection sample surface a plural number of times, a stage that holds an inspection sample and configured to be moved in a longitudinal direction of the linear illumination region at a feed pitch shorter than a longitudinal length of the linear illumination region, the feed pitch being variable; and at least one detection optical system that detects scattered lights scattered plural times from the linear illumination region on the inspection sample surface, wherein the at least one detection optical system includes a focusing system and a multi-pixel sensor array, and is located perpendicular to a longitudinal direction of the linear illumination region.