Positive photoresist composition with 1,2 naphthoquinone diazide and novolak resin condensed from mixture of m-cresol, p-cresol, and 2,5- xylenol with formaldehyde

摘要

Disclosed herein is a positive photoresist composition containing (a) a photosensitizer of 1,2-naphthoquinone diazides photosensitive-material comprising an ester of 2,3,4,4'- tetrahydroxybenzophenone in which on the average, not less than two hydroxy groups of 2,3,4,4'- tetrahydroxybenzophenone have been esterified by 1,2- naphthoquinonediazide-5-sulfonic acid and (b) a novolak resin obtained by condensing a mixture of m-cresol, p-cresol and 2,5-xylenol with formaldehyde.