Patent ID: 6281135
Filing Date: 2001-08-28
Classification: G03F,H01J,H01L,Y10S

Abstract:
A method for ashing photoresist 16 and/or post etch residues from a substrate 98 subsequent to an etching procedure comprising:a. placing at least one substrate 98 having photoresist 16 and/or post etch residues thereon into a wafer processing chamber 22;b. forming a reactive species by generating a plasma in the absence of oxygen wherein a gas for generating said plasma comprises a hydrogen bearing gas and a fluorine bearing gas; andc. selectively removing the photoresist 16 and/or the etch residues including sidewall polymer depositions from an underlying layer in contact with the photoresist and/or post etch residues at a removal rate greater than a rate of removal of the underlying layer by exposing the substrate to said reactive species wherein said reactive species are essentially electrically neutral.