Patent ID: 8470511
Filing Date: 2013-06-25
Classification: G03F

Abstract:
1. A chemically amplified negative resist composition for EB or EUV lithography, comprising (A) an alkali-soluble polymer, (B) an acid generator capable of generating an acid catalyst, and (C) a nitrogen-containing compound as a basic component, said polymer as component (A) turning alkali insoluble under the action of the acid catalyst in the presence or absence of a crosslinker, wherein a basic polymer PB comprising recurring units of the general formulae (1) and (2) and having a weight average molecular weight of 1,000 to 50,000 serves as both components (A) and (C), wherein A is a single bond or a C R R B Z R a is an integer of 0 to 4, b is a positive integer of 1 to 5, p and q are each independently 0 or 1, t is an integer of 0 to 2, with the proviso that when q=0, the atom in B wherein the recurring units of formula (1) are incorporated in a content of at least 64 mol % and the recurring units of formula (2) are incorporated in a content of 0.005 to 10 mol % based on the total recurring units in overall polymers in the resist composition.