Patent ID: 7717295
Filing Date: 2010-05-18
Classification: H01L

Abstract:
1. A treatment solution supply apparatus comprising: a storage tank for a treatment solution; a pump for supplying the treatment solution; a nozzle for discharging the treatment solution; and a flow meter interposed between the pump and the nozzle which monitors flow of the treatment solution to the nozzle; and a controller which controls operation of the pump; wherein the controller receives a feedback signal from the flow meter and is configured to control the operation of the pump such that a flow amount of treatment solution from the pump is integrated with a discharge amount of the treatment solution discharged from the nozzle during an entire dispensing operation beginning with an initial discharge stage of the nozzle triggered by an ON state of the pump when an ON/OFF of dispense command is executed by the controller, so as to quantify the discharge amount of the treatment solution discharged from the nozzle, and wherein the controller uses the feedback signal from the flow meter for controlling a revolution frequency of the pump to be varied based on the discharge amount from the nozzle.