Patent ID: 8469285

Claim:
A chemical liquid supply nozzle comprising: a plurality of chemical liquid supply nozzles as a bundle, each of the plurality of chemical liquid supply nozzles includes: a block shaped nozzle main body connected to a front end of a flow path member through which chemical liquid flows; a chemical liquid flow path provided at the nozzle main body to pass the chemical liquid supplied from the flow path member therethrough; a cutoff valve provided at the chemical liquid flow path to open and close the chemical liquid flow path; a suction flow path provided at the nozzle main body to be connected to the chemical liquid flow path at an upstream side of the cutoff valve; a suction unit provided at the nozzle main body and configured to suck the chemical liquid remaining at a downstream side of the cutoff valve to an upstream side of the cutoff valve and remove by sucking the chemical liquid of the chemical liquid flow path to the suction flow path, after the chemical liquid is discharged from a downstream end of the chemical liquid flow path; a first fluid flow-through space formed at a downstream side of the suction flow path in the chemical liquid flow path, the first fluid flow-through space being connected to the chemical liquid flow path; a first valve main body that divides the first fluid flow-through space and the chemical liquid flow path and is capable of entering into the chemical liquid flow path and retreating from the chemical liquid flow path, the first valve main body being provided at the cutoff valve; and a first fluid flow path provided at the nozzle main body to perform an operation to increase pressure of the first fluid flow-through space and to shut off the chemical liquid flow path by pressing the first valve main body toward a wall surface directed to the first fluid flow-through space and an operation to decrease pressure of the first fluid flow-through space and to open the chemical liquid flow path by spacing the first valve main body from the wall surface, thereby supplying liquid to the first fluid flow-through space and removing the liquid from the first fluid flow-through space; a block shaped flow path forming member provided to be close to each nozzle main body; a first main flow path provided at the flow path forming member to supply the liquid to the first fluid flow path of each nozzle main body and to remove the liquid from the first fluid flow path, the first main flow path being common to each nozzle main body; a first branch flow path provided at the flow path forming member, the first branch flow path being branched from the first main flow path to be connected to the first fluid flow path of each nozzle main body; and a control valve provided at the flow path forming member to switch the opening and closing of each of the first branch flow path independently from each other.