Patent ID: 8657942
Filing Date: 2014-02-25
Classification: C23C,H01L

Abstract:
1. A trap device for removing a liquid compound from a waste stream exhaust from a process chamber comprising: a separation unit configured to separate the liquid compound from the waste stream while the liquid compound is in a liquid state, wherein the liquid compound is part of the waste stream before the waste stream enters the separation unit; a collection device configured to collect the liquid compound separated from the waste stream; a flow control device configured to selectively isolate the collected liquid compound from the waste stream; a heating device configured to evaporate the liquid compound collected within the collection device to return the compound in gaseous form to the waste stream; a conduit configured to convey the compound in gaseous form from the collection device to the waste stream downstream from the separation unit; and a controller configured to control the rate of evaporation of the liquid compound from the collection device.