Patent ID: 7588036

Claim:
A process for removing unwanted deposition build-up from one or more interior surfaces of a HDP-CVD substrate processing chamber, said process comprising: performing a substrate processing operation on the substrate within the HDP-CVD substrate processing chamber and then transferring the substrate out of the HDP-CVD substrate processing chamber; flowing a first etchant gas including a first fluorine-containing source into a remote plasma source, forming reactive species within the remote plasma source from the first etchant gas and transporting the reactive species into the HDP-CVD substrate processing chamber to remove a first portion of the unwanted deposition build-up at a first temperature; extinguishing the remote plasma source; thereafter, flowing a second etchant gas including a second fluorine-containing source into the HDP-CVD substrate processing chamber and forming an RF plasma within the HDP-CVD substrate processing chamber from the second etchant gas in order to remove a second portion of the unwanted deposition build-up at a second temperature; performing a temperature-based endpoint detection process; and terminating the removal of the second portion of the unwanted deposition build-up in response to the temperature-based endpoint detection process.