Patent ID: 6945259

Claim:
A substrate cleaning apparatus comprising: a cleaning cup configured to receive a to-be-cleaned substrate; a table disposed in the cleaning cup, configured to support the to-be-cleaned substrate; a first nozzle disposed in the cleaning cup, configured to supply an acid liquid agent; a second nozzle disposed in the cleaning cup, configured to supply an alkaline liquid agent; a third nozzle disposed in the cleaning cup, configured to supply hot pure water; a pure water heating mechanism configured to supply the hot pure water; a branch line formed in an intermediate portion of a pipe extending from the pure water heating mechanism to the third nozzle configured to supply the hot pure water to lower water pressure in the pipe; and a control mechanism configured to control operations of the first to the third nozzle and the pure water heating mechanism; and an open/close valve provided between the branch line and the pipe, wherein the control mechanism controls the open/close valve to interrupt emission of hot water from the third nozzle by opening the open/close valve to lower the pressure in the pipe.