Patent ID: 8728330
Filing Date: 2014-05-20
Classification: B05C,F04B,G03F,H01L

Abstract:
1. A chemical liquid supply device comprising: a suction channel connected to a pump provided with a pump chamber which is expanded and contracted by a pump member, wherein chemical liquid in a chemical liquid container flows into the pump chamber through the suction channel; a discharge channel connected between the pump and a discharge nozzle, wherein the discharge channel discharges the chemical liquid in the pump chamber to the discharge nozzle; and a circulation channel provided with an expanding and contracting portion in which the chemical liquid supplied from the pump chamber is temporarily stored, wherein an inflow portion and an outflow portion are connected to the pump, and the circulation channel returns the chemical liquid supplied from the pump chamber to the pump chamber, wherein a filter filtering the chemical liquid returned to the pump chamber through the circulation channel is provided in the circulation channel, and an operation of circulating the chemical liquid in the chemical liquid container through the circulation channel and an operation of discharging the filtered chemical liquid in the circulation channel to the discharge nozzle are preformed by the pump.