Patent ID: 7727296
Filing Date: 2010-06-01
Classification: B01D,Y10S

Abstract:
1. A collecting unit to be disposed on an exhaust passage of a semiconductor processing apparatus to collect by-products contained in an exhaust gas flowing through the exhaust passage, the collecting unit comprising: a casing having a gas inlet and a gas outlet and configured to form a part of the exhaust passage; a trap body detachably disposed inside the casing and configured to collect a part of the by-products contained in the exhaust gas, the trap body including a plurality of fins arrayed in a flow direction of the exhaust gas, and each of the fins having a surface on which a part of the by-products is deposited and trapped; and a receiving mechanism disposed inside the casing and configured to receive a part of the by-products that peels off from the trap body or an inner surface of the casing to prevent this part from being deposited on a bottom of the casing, the receiving mechanism being configured to allow a part of the by-products held thereon to be in contact with a cleaning gas from above and from below, wherein the receiving mechanism comprises a board disposed to expand along an inner surface of the casing with a predetermined gap interposed therebetween and having a number of vent-holes which the cleaning gas passes through, and the board comprises a lower portion disposed below the trap body and interposed between the trap body and the inner surface of the casing half around the trap body.