Patent ID: 7959970
Filing Date: 2011-06-14
Classification: B08B,C23C,H01J

Abstract:
1. A method of removing fluoro-carbon polymer chamber residue from a plasma processing system, comprising: introducing a process gas into a process chamber of the plasma processing system, the process gas consisting of CO, or CO in combination with inert Ar gas; maintaining a pressure between 10 mTorr and 100 mTorr within the process chamber; generating a plasma from the process gas; exposing the fluoro-carbon polymer chamber residue to the plasma in a waferless dry cleaning process to form a volatile reaction product from the residue, where a shield wafer is not provided on a substrate holder of the plasma processing system so that the substrate holder is cleaned by the waferless dry cleaning process; and exhausting the reaction product from the process chamber, wherein the method of removing fluoro-carbon polymer chamber residue using a process gas consisting of CO or CO in combination with Ar results in reduced chamber residue when compared to a method of removing fluoro-carbon polymer chamber residue using a process gas consisting of Ar in combination with O