Patent ID: 6726771
Filing Date: 2004-04-27
Classification: H01L,Y10T

Abstract:
A treatment solution supply unit for supplying, with a treatment solution in a treatment solution supply source forcibly fed by a pump, said treatment solution on a substrate through a supply path connecting said solution supply source and a discharge nozzle, comprising:an intermediate buffer tank disposed in said supply path between said treatment solution supply source and said pump for storing said treatment solution temporarily; another pump disposed in said supply path between said intermediate buffer tank and said treatment solution supply source for supplying said treatment solution to said intermediate buffer tank; and a pump controller for operating said pump in association with said another pump, so that based on the control of said pump controller, the same amount of said treatment solution as that of said treatment solution supplied to said discharge nozzle from said intermediate buffer tank by said pump is supplied to said intermediate buffer tank from said treatment solution supply source by said another pump.