Patent ID: 7837770

Claim:
A method of processing a semiconductor wafer, the method comprising: setting the semiconductor wafer in a process chamber which is connected to a vacuum pump via a by-product pile-up section having a housing body; heating a liquefaction reduction section located in front of the by-product pile-up section; positioning a plurality of cooling plate panels within the by-product pile-up section, wherein the plurality of cooling plate panels are substantially parallel to each other and wherein each cooling plate panel includes: at least one through-opening; and at least one coolant path therein; aligning the coolant path within each cooling plate panel to a coolant supply path of the housing body of the by-product pile-up section; supplying coolant to all cooling plate panels; supplying reaction gases into the process chamber; processing a material on the semiconductor wafer by the reaction gases in the process chamber, wherein the processing produces reaction by-products; heating the reaction by-products in the liquefaction reduction section to reduce liquefaction of the reaction by-products; cooling the heated reaction by-products by the plurality of cooling plate panels, wherein the heat reaction by-products pass through the through-openings of the plurality of cooling plate panels; and removing any remaining by-products through the vacuum pump.