Patent ID: 6156479
Filing Date: 2000-12-05
Classification: C08F,C09D,G03F

Abstract:
An improved thermosetting 193 nm anti-reflective composition comprising:a. the reaction product of a high molecular weight acrylic polymer or copolymer and a non-polycyclic dye, said dye being either a carboxylic acid or a phenolic compound which is light-absorbing at 193 nm, said reaction product having the polymer or copolymer linked to the dye via a hydroxyester moiety in the case of the carboxylic acid dyes or a hydroxyether moiety in the case of the phenolic dyes, which moiety forms in situ during the reaction;b. an alkylated aminoplast crosslinking agent selected from the group of resins consisting of melamine, urea, benzoguanamine, glycoluril and derivatives thereof;c. an active or latent protonic acid catalyst for curing; andd. a low-to-medium boiling point alcohol-containing solvent system comprising at least 20% alcohol,whereby said composition has improved plasma etch rate while retaining fast curing speed, high optical density, good solubility in and coatability from safe, volatile solvents, improved conformality and feature coverage but having high differential solubility as between the composition and the photoresist.