Patent ID: 8905051

Claim:
A liquid processing apparatus, comprising: a processing chamber provided with a substrate holding unit holding a substrate and a cup disposed around the substrate holding unit; a nozzle configured to supply a fluid to the substrate held by the substrate holding unit; a nozzle supporting arm configured to support the nozzle; and a gas ejection mechanism installed at the nozzle supporting arm and having two or more gas ejection holes each configured to eject a gas toward a front end surface of the nozzle supporting arm, thereby removing contaminants attached to the front end surface of the nozzle supporting arm, wherein the nozzle is provided in a surface of the nozzle supporting arm that extends in a longitudinal direction of the nozzle supporting arm among surfaces of the nozzle supporting arm, the front end surface of the nozzle supporting arm extends in a different direction from the longitudinal direction of the nozzle supporting arm, and the gas ejection mechanism is provided in the front end surface of the nozzle supporting arm, the gas ejection mechanism includes a protrusion protruding from the front end surface of the nozzle supporting arm and a gas supply tube installed within the nozzle supporting arm, and the two or more gas ejection holes are provided around the protrusion, and the gas supply tube is configured to supply the gas to the protrusion.