Patent ID: 6332925
Filing Date: 2001-12-25
Classification: B01D,C23C,F25B,Y02C

Abstract:
An evacuation system comprising:a processing chamber;a vacuum pump; andan evacuation conduit communicating said processing chamber and said vacuum pump to evacuate said processing chamber, said evacuation conduit being provided with a first trapping device and a second trapping device arranged in series in a direction from said processing chamber to said vacuum pump, said first trapping device operating at a higher temperature and said second trapping device operating at a lower temperature, both cooperating for capturing components contained in an exhaust gas discharged from said processing chamber,wherein at least one of said first trapping device and said second trapping device is cooled by vaporization heat of liquified gaswherein at least either of said first or second trapping device has an inlet port for admitting a regeneration gas and an outlet port for releasing a regenerated gas other than an entry port and an exit port connected to said evacuation conduit.