Patent ID: 9091397
Filing Date: 2015-07-28
Classification: F17D,G05D,Y10T

Abstract:
1. A gas supply delivery arrangement for supplying process gas to a plurality of multi-zone gas feed chambers of a plasma processing system, comprising: a plurality of gas supply conduits; a shared gas panel coupled to receive different gases from said plurality of gas supply conduits, said shared gas panel mixing said different gases to create mixed gas and evenly splitting said mixed gas to supply a portion of said mixed gas to each of said plurality of multi-zone gas feed chambers, wherein said shared gas panel is configured to output each of said portions of said mixed gas from the shared gas panel via different respective conduits; a plurality of multi-zone gas feed devices comprising at least two multi-zone gas feed devices coupled downstream of said shared gas panel, each of said plurality of multi-zone gas feed devices configured to (i) separately receive, directly from said shared gas panel via said different respective conduits, said portion of said mixed gas, and (ii) adjustably split said portion of said mixed gas received by each of said plurality of multi-zone gas feed devices from said shared gas panel into a plurality of gas zone flows destined for different zones of a multi-zone gas feed chamber of said plurality of multi-zone gas feed chambers; first respective valves disposed between each of said plurality of multi-zone gas feed devices and said shared gas panel; second respective valves disposed between each of said plurality of multi-zone gas feed devices and said plurality of multi-zone gas feed chambers; and logic for receiving optical emission spectroscopy signals from at least two multi-zone gas feed chambers of said plurality of multi-zone gas feed chambers and for providing a control signal to said first respective valves and said second respective valves based on said received optical emission spectroscopy signals.