Patent ID: 7205087

Claim:
A method for producing a photoresist relief image comprising: applying a coating layer of a liquid photoresist composition to a substrate, the photoresist composition comprising (i) a resin that has photoacid-labile groups and is at least substantially free of aromatic groups, (ii) a photoactive component, and (iii) a solvent component that comprises methyl isoamyl ketone and cyclohexanone, wherein at least 80 volume percent of all solvent of the photoresist composition is methyl isoamyl ketone and cyclohexanone and the methyl isoamyl ketone:cyclohexanone volume-to-volume ratio in the photoresist composition is 2:1 or greater; heating the photoressist composition layer to remove solvent; exposing the photoresist coating layer to patterned activating radiation through a photomask the radiation having a wavelength of about 193 nm; and developing the exposed resist layer.