Patent ID: 7880873

Claim:
A droplet discharge device comprising: a transport table configured and arranged to transport a substrate mounted on the transport table along a transport path; a droplet discharge head configured and arranged to discharge a functional liquid onto the substrate mounted on the transport table; and a first foreign matter detection sensor configured and arranged to detect foreign matter on the substrate, the first foreign matter detection sensor having a first light projecting unit and a first light receiving unit, the first light projecting unit being configured and arranged to emit a first detection light so that an optical axis of the first detection light is sloped toward the substrate, and the first light receiving unit being disposed across the transport path from the first light projecting unit, and configured and arranged to receive a part of the first detection light emitted directly to the first light receiving unit along an upper surface of the substrate and a part of the first detection light reflected by the upper surface of the substrate, the first foreign matter detection sensor detecting foreign matter on the substrate based on an amount of the first detection light received by the first light receiving unit.