Patent ID: 9142013
Filing Date: 2015-09-22
Classification: G06T,H01L

Abstract:
1. A substrate storage condition inspecting apparatus whose inspection object is a transport container that is provided with, in a storage space for storing a disk-shaped semiconductor substrate, support bodies for supporting an outer circumferential portion of the semiconductor substrate that are arranged in a plurality of stages in a state in which the support bodies are spaced apart in a vertical direction, and is provided with an opening through which the semiconductor substrate is transported in and out of the storage space from and to the outside, the apparatus comprising: an illumination device that applies light through the opening to the semiconductor substrate stored in the transport container located at an inspecting position; an imaging device that captures an image of the semiconductor substrate to which light has been applied by the illumination device; and a substrate storage condition determining unit that performs substrate storage condition determination processing for determining whether or not a storage orientation of the semiconductor substrate is normal on the basis of the image captured by the imaging device, wherein the illumination device includes, on a front side of the opening of the transport container located at the inspecting position, a first illumination portion and a second illumination portion that are spaced apart in a width direction, which is orthogonal to the vertical direction of the opening, and the substrate storage condition determining unit is configured to: perform luminescent spot detection processing for detecting a pair of high-luminance portions on an inspection image captured by the imaging device, the pair of high-luminance portions being generated by light applied by the first illumination portion and the second illumination portion in locations of a peripheral edge portion of the semiconductor substrate that are circumferentially spaced apart; and perform orientation determination processing for determining whether or not the storage orientation of the semiconductor substrate is abnormal on the basis of a positional correspondence in the vertical direction for the pair of high-luminance portions detected on the inspection image by the luminescent spot detection processing.