Brown stain suppressing phenol free and chlorinated hydrocarbons free photoresist stripper
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United States of America Patent
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Jan 1, 1985
Grant Date -
N/A
app pub date -
May 20, 1983
filing date -
May 20, 1983
priority date (Note) -
Expired
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Abstract
Stripping solution compositions which avoid the problem know as 'brown staining' are provided. Relevant stripping solutions are those that are free from phenol and chlorinated hydrocarbon compounds and comprise a surfactant alkylarylsulfonic acid having 12-20 carbons, a hydrotropic aromatic sulfonic acid having 6-9 carbons and a halogen-free aromatic hydrocarbon solvent with a boiling point above 150.degree. C. To suppress brown staining, a water soluble sulfone is incorporated into the stripping solution. The stripping compositions effectively remove organic polymeric substances from inorganic substrates and are substantially clear water rinsable.
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