Patent ID: 6749998
Filing Date: 2004-06-15
Classification: G03F

Abstract:
An alkaline-containing photoresist stripping composition comprising from about 50% to about 95% by weight of a stripping solvent having a solubility parameter of from about 8 to about 15, from about 1% to about 50% by weight of a nucleophilic amine and a reducing agent in an amount effective to inhibit or reduce metal corrosion when said stripping composition is employed to strip hardened or cross-linked photoresist from a substrate containing metal, said reducing agent being selected from the group consisting of ascorbic acid, an unsaturated ketone, uric acid, tetramisole, hydrazine and derivatives thereof, oximes, hydroquinone, gallic acid, 2,4,5-trihydroxybutyrophenone, 3,5-di-tert-butyl-4-hydroxytoluene, 3-tert-butyl-4-hydroxyanisole, tocopherol, 6-hydroxy-2,5,7,8-tetra-methylchroman-2-carboxylic acid, a thiol selected from compounds of the formula R5SH where R5 is an organic radical selected from the group consisting of heterocyclic, dicarboxyalkyl, an amino substituted carboxyalkyl radical or a radical of the formula where R6 and R7 are alkyl radicals; and aldehydes and their derivatives.