Patent ID: 9506145
Filing Date: 2016-11-29
CPC Classification: B08B,C11D,C23C

Claim Text:
1. A method of cleaning a process chamber having an interior space, comprising: providing a purge gas to a first portion of the interior space; providing a first cleaning gas to a second portion of the interior space, wherein the first portion of the interior space is separated from the second portion of the interior space by a first UV transparent showerhead; activating the first cleaning gas using ultraviolet (UV) radiation from UV lamps positioned outside the process chamber; providing a second cleaning gas to the second portion of the interior space, wherein the second cleaning gas is provided to the second portion of the interior space through a flow channel that allows gas to enter the second portion of the interior space without first flowing through the first portion of the interior space; flowing the first and second cleaning gases through a second UV transparent showerhead that separates the second portion of the interior space from a third portion of the interior space such that the first and second cleaning gases can remove contaminant material from surfaces of the process chamber; and exhausting the purge gas, the first cleaning gas, and the second cleaning gas through a side wall of the chamber.