Patent ID: 6235213
Filing Date: 2001-05-22
Classification: H01L,Y10S

Abstract:
A method of removing at least a portion of a material from a substrate, comprising:providing a substrate in a reaction chamber, the substrate having a material supported thereover;first etching the material while the substrate is in the reaction chamber;after the first etching, cleaning a component from at least one sidewall of the reaction chamber while the substrate remains therein; the component comprising a species that is present in the material; the cleaning comprising exposing the sidewall and substrate to conditions which substantially selectively remove the component from the sidewall while not removing or etching any material supported by the substrate from the substrate; wherein the cleaning comprises:exposing the sidewall to a plasma comprising a combination of SF.sub.6 and oxygen atoms; chlorine atoms and oxygen atoms, or NF.sub.3 and oxygen atoms;maintaining a pressure within the reaction chamber at from about 20 mTorr to about 60 mTorr; andmaintaining the substrate at a bias power of 0; and after the cleaning, second etching the material while the substrate is in the reaction chamber.