Patent ID: 6391514
Filing Date: 2002-05-21
Classification: G03F

Abstract:
A positive working photosensitive composition, that consists essentially of an admixture of; a) at least one film forming resin; b) at least one photosensitizer component; and 3) a photoresist solvent mixture containing more than 70 weight percent of a C1-C4 alkyl glycol C1-C4 alkyl ether and less than 30 weight percent of either a C1-C4 alkyl amyl ketone or a C1-C4 alkyl C1-C4 alkoxy propionate, which following coating onto silicon wafers, exposure and development, yield imaged wafers having dose to clear (DTC) values of 42 to 52 millijoules per square centimeter (mJ/cm2).