Patent ID: 6379859
Filing Date: 2002-04-30
Classification: G03F

Abstract:
A positive photoresist composition comprising(A) an alkali soluble resin, (B) a photosensitizer containing a quinonediazide ester of methyl gallate and a quinonediazide ester of a compound of the following formula (I): â€ƒwherein each of R1 and R2 is independently a methyl group or an ethyl group, and (C) at least one compound of phenol group-containing compounds selected from the group consisting of the following compounds (c1)-(c6) and having an elution time in the range from 6 to 30 minutes in high performance liquid chromatography, said high performance liquid chromatography being conducted under the following conditions: eluent: a mixed solvent of water:tetrahydrofuran:methanol=40:24:36 (by weight); column: 4.6 mm (diameter)Ã—150 mm (length) containing 5 &mgr;m silica gel as a filler (carbon content being about 15%); column temperature: 45.0Â° C.; and supply rate of eluent: 0.700 ml/min