Patent ID: 8057603
Filing Date: 2011-11-15
Classification: B08B,H01J,Y10S

Abstract:
1. A method of cleaning a substrate processing chamber that has therein a space into which a substrate is transferred and carries out plasma processing on the substrate in the space, the substrate processing chamber having a processing chamber inside component made of silicon and at least part of which is exposed to the space, the substrate processing chamber cleaning method comprising: a substrate transferring out step of transferring out the substrate from the substrate processing chamber; a first plasma processing step of introducing oxygen gas into the space, producing oxygen ions and oxygen radicals from the introduced oxygen gas by applying radio frequency electrical power into the space, reacting the oxygen radicals with reaction product attached to the processing chamber inside component so that the reaction product is decomposed and thus removed; and a second plasma processing step of introducing carbon tetrafluoride gas into the space, producing fluorine ions and fluorine radicals from the introduced carbon tetrafluoride gas by applying radio frequency electrical power into the space, and decomposing and removing oxide remaining on the surface of the processing chamber inside component by the fluorine ions and the fluorine radicals, wherein in said first and second plasma processing steps, the plasma processing is not carried out on the substrate, and wherein in said first plasma processing step, a potential difference between the surface of the processing chamber inside component and the space is set to 0V.