Patent ID: 8172946

Claim:
A semiconductor device manufacturing apparatus including: a substrate processing chamber; a gas supply tube for supplying substrate processing gas to said substrate processing chamber; a first exhaust tube for discharging gas used for substrate processing from said substrate processing chamber; an exhaust trap for removing components contained in the gas used for substrate processing introduced through said first exhaust tube; and a second exhaust tube for exhausting gas out of said exhaust trap after components have been removed from the gas used for substrate processing; wherein said exhaust trap comprising: a baffle plate that is substantially perpendicular to the direction in which gas is introduced into said exhaust trap and that has a concave surface in the side facing gas introduction port of the exhaust trap, and formed into an arcuate shape centered around the axis of a cooling tube; a plurality of flow adjusting plates formed into C-ring shapes, parts of which in the circumferential direction are recessed in the radial direction are provided in parallel to each other in a longitudinal direction of the baffle plate and provided substantially in parallel to the gas introduction direction, on the concave surface side of the baffle plate.