Patent ID: 8074677
Filing Date: 2011-12-13
Classification: H01J,H01L,Y10T

Abstract:
1. Apparatus for delivering gases to a semiconductor processing chamber, comprising: a plurality of gas input lines each having an inlet port; a plurality of gas output lines each having an outlet port; a plurality of connecting lines, each connecting line coupling a respective pair of gas input and gas output lines; a plurality of connecting valves, each connecting valve arranged to control flow through a respective connecting line, wherein each inlet port is selectively coupled to each outlet port by the plurality of connecting valves; a plurality of mass gas flow controllers, each mass gas flow controller arranged to control flow into a respective inlet port; and a flow restrictor coupled to one outlet port of the plurality of gas output lines, wherein the flow restrictor is sized to provide flow conditions that are substantially equal to flow conditions of the processing chamber.