Patent ID: 8388800

Claim:
A wet processing apparatus, comprising: a conveyor configured for conveying a substrate; a spraying system arranged opposite to the conveyor, the spraying system comprising an upper spraying conduit and an upper spraying nozzle mounted on the upper spraying conduit, the upper spraying conduit being configured for supplying a wet processing liquid to the upper spraying nozzle, the upper spraying nozzle being configured for spraying the wet processing liquid to an upper side of the substrate; and a suction system comprising a suction conduit and a suction nozzle connected to the suction conduit, the suction nozzle being adjacent to the conveyor and configured for suction the wet processing liquid sprayed on the substrate, the suction conduit being connected to and in communication with the upper spraying conduit in such a manner that the flowing of the wet processing liquid in the upper spraying conduit create a negative pressure in the suction conduit to enable the suction nozzle to suck the wet processing liquid sprayed by the upper spraying nozzle on the substrate, wherein the upper spraying conduit is perpendicular to the substrate on the conveyor, the suction conduit comprises a first suction tube connected to the upper spraying conduit and a second suction tube connected to the suction nozzle, the second suction tube is parallel to the upper spraying conduit, the first suction tube obliquely extends from the upper spraying conduit to the second suction tube, the upper spraying conduit comprises a first exporting tube and a second exporting tube coaxial with each other, the second exporting tube is connected between the first exporting tube and the upper spraying nozzle, the inside diameter of the first exporting tube decreases from the end distal from the second exporting tube to the other end connected to the second exporting tube, the inside diameter of the second exporting tube increases from the end connected to the first exporting tube to the other end connected to the upper spraying nozzle, and the first suction tube is connected to the second exporting tube.