Patent ID: 8776821
Filing Date: 2014-07-15
Classification: C23C,G05D,Y10T

Abstract:
1. A delivery system comprising: a delivery device having an inlet port and an outlet port; a first proportional valve; wherein the delivery device is in operative communication with the first proportional valve; wherein the first proportional valve is operative to control the flow of a carrier gas based on an applied voltage; where the first proportional valve is in fluid communication with a first stream that contacts the delivery device: a second proportional valve in fluid communication with a second stream that bypasses the delivery device and contacts the first stream at a point downstream of the delivery device: where both the first stream and the second stream emanate from a single stream; a chemical sensor; the chemical sensor being disposed downstream of the delivery device and being operative to analyze chemical contents of a fluid stream emanating from the delivery device; the chemical sensor being in communication with the first proportional valve; a first pressure/flow controller being in operative communication with the chemical sensor and with the first proportional valve; wherein the delivery system is operative to deliver a substantially constant number of moles of a precursor vapor per unit volume of the carrier gas to a plurality of reactors that are communication with the delivery system; where none of the flows in the delivery system contact each other from opposite directions and where the chemical sensor is disposed downstream of the delivery device and downstream of the point where the first stream and the second stream contact each other; a pressure sensor: the pressure sensor being disposed downstream of the delivery device; and a second pressure/flow controller being in operative communication with the pressure sensor; where the second pressure/flow controller is in electrical communication with the second proportional valve.