Patent ID: 7934513

Claim:
A substrate cleaning facility having a multi-storied structure, comprising: a cleaning part including a plurality of process chambers having at least one process bath in which substrates are cleaned, the plurality of process chambers being stacked; an interface part where substrates are transferred between the plurality of process chambers, the interface part includes: a transfer bath containing one of the substrates to prevent exposure of the substrate to air, and a transfer bath moving part for allowing the transfer bath to move up and down; and a transfer robot, wherein the transfer bath includes a nozzle configured to supply a cleaning solution thereinto, the substrates are transferred between the plurality of process chambers while being submerged in the cleaning solution of the transfer bath, the transfer bath further includes an exhaust valve configured to exhaust a cleaning solution, the exhaust valve is made of an elastic member to continue to cut off its outlet when an external force is not applied, the exhaust value includes: a body; a shield plate opposite to a bottom of the body in the body to open and close the outlet of the exhaust valve; and a spring installed in the body to press the shield plate, the interface part further includes a switch mounted on a bottom of the interface part for opening and closing the exhaust valve, and the switch further includes a gas injection part for injecting a dry gas to the injection valve to dry the exhaust valve, wherein the switch includes: a rod; a body having a space into which at least a part of the rod is inserted and including first and second openings acting as a path through which a fluid flows in or out; and a separation plate moved between formed positions of the first and second openings by the fluid flowing in through the first or second opening, wherein: simultaneously to movement of the separation plate, the road pushes up the separation plate to open the exhaust valve, and the gas injection part includes: an injection line being a hole through which the separation plate and the rod to penetrate; and an inflow port formed at the body to apply a dry gas to the injection line while the rod moves to close the exhaust valve.