Patent ID: 6843833

Claim:
A method for preventing outgassing pollution, comprising the steps of: (a) loading a plurality of wafers into a front opening unified pod, wherein the interior of the front opening unified pod has at least a cleaning apparatus which is capable of producing a jet of air directed towards an opening of the front opening unified pod; (b) transferring an unprocessed wafer from the front opening unified pod to a reaction chamber through the opening of the front opening unified pod; (c) processing the unprocessed wafer inside the reaction chamber to produce a processed wafer; (d) transferring the processed wafer from the reaction chamber to the front opening unified pod; (e) repeating the steps from (b) to (d) until all the wafers inside the front opening unified pod are processed; and (f) blowing the jet of air via the cleaning apparatus into the front opening unified pod throughout the period when the steps from (b) to (e) are performed so that the front opening unified pod is purged to remove any possible contaminants that might contaminate the unprocessed wafers.