Patent ID: 7087356

Claim:
A positive resist composition for 193 nm lithography processes, said resist comprising (A) a silicon-free imaging polymer component, and (B) a radiation sensitive acid generator, said imaging polymer component comprising an acid-sensitive polymer having: (a) acid labile moiety-containing monomeric units of the structure: wherein: (i) X is an alkylene or an alkylene ether, (ii) M is an ethylenic backbone moiety, (iii) q is equal to 0 or 1, and (iv) Q is a group containing a remote acid labile moiety independently selected from the group consisting of t-butyl ester, methyl cyclohexyl ester, methyl adamantyl ester and combinations thereof; (b) acrylic monomeric units having a pendant polar moiety other than lactone selected from fluoroalcohol groups which promote solubility in aqueous alkaline solutions; and (c) norbornenelactonemethacrylate monomeric units.