PROCESSING LIQUID SUPPLYING APPARATUS AND METHOD OF SUPPLYING PROCESSING LIQUID

摘要

A processing liquid supplying apparatus performs an ejecting step in which a processing liquid suctioned into a pump passes through a filter device and is ejected from an ejecting part without returning the processing liquid back to the pump; a returning step in which the processing liquid suctioned into the pump is returned to a processing liquid source side of a mixing section; and a replenishing step in which the processing liquid returned to the processing liquid source side is suctioned into the pump together with the processing liquid replenished from the processing liquid source. The processing liquid passes through the filter device in at least one of the returning step and the replenishing step. The amount of the processing liquid returned to the processing liquid source side in the returning step is larger than the amount of the processing liquid ejected from the ejecting part in the ejecting step.

主权项

1. A processing liquid supplying apparatus that supplies a processing liquid supplied from a processing liquid source via an ejecting part to a process object, said apparatus comprising:
a processing liquid supplying passage connecting the processing liquid source to the ejecting part; a mixing section having a circulation passage which is provided thereon with a pump and a filter device connected to a secondary side of the pump, the mixing section being disposed on the processing liquid supplying passage between the processing liquid source and the ejecting part to allow the processing liquid having been passed through the filter device and the processing liquid replenished from the processing liquid source to be mixed with each other; and a control section configured to output a control signal, upon receipt of which the processing liquid supplying apparatus performs: an ejecting step in which the processing liquid having been suctioned into the pump passes through the filter device and is ejected from the ejecting part without returning the processing liquid back to the pump; a returning step in which the processing liquid having been suctioned into the pump is returned to a processing liquid source side of the mixing section; and a replenishing step in which the processing liquid having been returned to the processing liquid source side is suctioned into the pump together with the processing liquid replenished from the processing liquid source, wherein the filter device is disposed to allow the processing liquid to pass through the filter device in at least one of the returning step and the replenishing step, and wherein an amount of the processing liquid returned to the processing liquid source side in the returning step is larger than an amount of the processing liquid ejected from the ejecting part in the ejecting step.