Patent ID: 8398753
Filing Date: 2013-03-19
Classification: B01D,B33Y

Abstract:
1. A method for removing contaminants from a gas in a semiconductor processing device, said method comprising the steps of: receiving an input gas in an apparatus comprising a plurality of parallel filter stages disposed within an enclosure, said enclosure including at least one inlet and at least one outlet; passing said gas through a flow controller, disposed within the enclosure, before making said gas available to the plurality of filter stages, said flow controller including a first edge, and a second edge distal from the panel; and passing a portion of said gas through each member of said plurality of parallel filter stages to remove at least a portion of said contaminants, the flow controller comprising gas flow channels, said gas flow channels distributed between the first edge and the second edge so that gas flow channel sizes vary between the first edge to the second edge, wherein said flow controller delivers substantially equal volumes of said gas to each member of said plurality of filter stages.