Patent ID: 9146007
Filing Date: 2015-09-29
Classification: F17D,H01L,Y10T

Abstract:
1. Apparatus for treating a work piece, comprising: a holder configured to hold the work piece in a predetermined orientation; a liquid dispenser positioned relative to said holder so as to dispense a treatment liquid onto a surface of the work piece when positioned on said holder; and a flow control system that controls a flow rate of treatment liquid dispensed from said liquid dispenser, said flow control system comprising a flow meter that measures a flow rate of liquid being supplied to said liquid dispenser, a controller that receives signals indicative of a flow rate measured by said flow meter, a pressure regulator that regulates pressure of the liquid supply downstream of the flow meter based on control signals from said controller, and a plurality of liquid supply paths downstream of the pressure regulator and upstream of an outlet of said liquid dispenser, each of said plurality of liquid supply paths being equipped with a respective shutoff valve, wherein the controller is configured to select an appropriate one of shutoff valves with all of the remaining shutoff valves being kept closed to provide a respectively different pressure drop to liquid when passing through a respective one of said plurality of liquid supply paths.