Patent ID: 6156476
Filing Date: 2000-12-05
Classification: G03F,Y10S

Abstract:
A positive photoresist composition comprising an alkali-soluble resin containing a copolymer of p-vinyphenol, p-t-butoxycarbonyloxystyrene and styrene; a dissolution inhibitor; and a photo-induced acid precursor, wherein the number of p-vinylphenol (m) the number of p-t-butoxycarbonyloxvstyrene (p), and the number of styrene (n) satisfy the following conditions:(m+p):n=from 50:50 to 95:5 andp:(m+p)=from 1:50 to 45:50; andwherein said dissolution inhibitor is a compound represented by the following formula (II): ##STR12## wherein R.sub.1 to R.sub.9 each represents a member selected from the group consisting of a hydrogen atom, an alkyl group, a t-butoxycarbonyloxy group and a hydroxyl group, provided that at least one of R.sub.1 to R.sub.4 is a t-butoxycarbonyloxy group and at least one of R.sub.5 to R.sub.9 is a t-butoxycarbonyloxy group.