Patent ID: 6998097

Claim:
A high pressure chemical vapor trapping system to separate and collect elements of a chemical vapor exhaust comprising: a hot trap positioned downstream of an exhaust pump, which exhaust pump is positioned directly downstream from a substrate processing chamber, the hot trap having a hot trap gas input port, a hot trap gas output port, a hot trap waste collection surface, and a heater to heat the hot trap to a first temperature, the hot trap adapted to accept chemical vapor exhaust at the hot trap gas input port at a trapping pressure to further a chemical reaction, and to provide non-gaseous wastes at the hot trap waste collection surface, and to provide gaseous exhaust at the hot trap gas output port; and a first cold trap positioned downstream from the hot trap, the first cold trap having a first cold trap gas input port operatively connected to the hot trap gas output port, a first cold trap gas output port, a first cold trap waste collection surface, and a first cold trap cooler to cool the first cold trap to a second temperature, said second temperature being lower than the first temperature, the first cold trap adapted to accept chemical vapor exhaust at the first cold trap gas input port to further the chemical reaction, and to provide non-gaseous wastes at the first cold trap waste collection surface, and gaseous exhaust at the first cold trap gas output port, whereby vapor by-products are collected in two stages.