Patent ID: 7635417

Claim:
A semiconductor apparatus for processing a wafer, comprising: a stage supporting the wafer; a fluid supply unit, providing a first fluid, wherein the fluid supply unit comprises a fluid supply pipe and a pivot element, the fluid supply pipe is connected to the pivot element and pivotable between a first position and a second position; and a cleaning unit having a lateral entrance, the lateral entrance being an opening facing the stage wherein, when the fluid supply pipe is in the first position, the fluid supply pipe provides the first fluid toward the wafer and when the fluid supply pipe is in the second position, the fluid supply pipe enters into the cleaning unit through the lateral entrance and is located in the cleaning unit, and the cleaning unit cleans a surface of the fluid supply pipe, wherein the cleaning unit comprises a chamber with the lateral entrance, an outlet and a first exhaust opening, the outlet and the first exhaust opening disposed in the chamber, and when the fluid supply unit is in the second position, the fluid supply unit is located in the chamber; wherein the cleaning unit further comprises a second exhaust opening and an exhaust pipe, the second exhaust opening disposed in the chamber, the exhaust pipe connected to the second exhaust opening, and wherein pollutant is removed from the chamber through the second exhaust opening and the exhaust pipe.