Patent ID: 8125651
Filing Date: 2012-02-28
Classification: B65G,H01L

Abstract:
1. A substrate detection device including a projector for projecting inspection light so as to pass through a predetermined position on a path of a substrate conveyed by a conveyance belt, a light receiver for receiving the inspection light projected by the projector, and a detector for detecting that the substrate reaches the predetermined position based on a decrease in amount of received light of the inspection light received by the light receiver when the substrate conveyed by the conveyance belt reaches the predetermined position and a portion of the inspection light is blocked by the substrate, characterized in that the inspection light is projected from the projector so as to include opposite ends of a width direction of the conveyance belt in an optical path of the inspection light in a direction orthogonal to a conveyance direction of the substrate conveyed by the conveyance belt and the light receiver receives the inspection light passing through upper and lower regions of the conveyance belt.