Positive photoresist stripping composition.

摘要

Piperazine containing positive photoresist stripping compositions are provided. Formulations include N-aminoalkylpiperazines with the formula <CHEM> bis-N-aminoalkylpiperazines of the formula <CHEM> N-hydroxyalkylpiperazine of the formula <CHEM> and bis-hydroxyalkylpiperazines with structure <CHEM> In the above formulae n = 1-6. Also included are piperazine derivatives such as those of the above formulae with a branch chain alkyl of 1-6 C atoms, and 5-6 C atom cycloalkyl substituted compounds wherein the cycloalkyl is substituted for -(CH2)n-. Components which may be mixed with the above described piperazine in preparing the positive photoresist stripping compositions of the invention include alkyl or cycloalkyl-2-pyrrolidones of the formula <CHEM> Other amide type solvents with the boiling point in excess of 200 DEG C as well as high boiling diethylene glycol ethers may also be incorporated.