Patent ID: 7999242
Filing Date: 2011-08-16
Classification: G01N,H01L

Abstract:
1. An inspection apparatus which inspects a defect of a substrate comprising: a holding unit which holds the substrate; a light projecting unit which irradiates the substrate with light; a light receiving unit which receives a light from the substrate; and a processing unit which detects the defect based on a result in response to the received light, wherein said holding unit comprises: a rotating unit which rotates the substrate; a plurality of position restriction units which restrict the substrate corresponding to rotation of the rotating unit; a plurality of pressing units which press the substrate corresponding to rotation of the rotating unit, and the position restriction units include first claws, wherein: the first claws are formed at sides of an outer periphery of each of the restriction units and contact with and press upper sides of the outer peripheral sides of the substrate, and a contact surface of a first claw that presses the upper side of the outer peripheral side of the substrate and a rotation axis of the substrate forms an acute angle.