Patent ID: 6200724
Filing Date: 2001-03-13
Classification: G03F

Abstract:
A chemical amplification resist composition for forming resist patterns which comprises a combination of an alkali-soluble base resin, a photoacid generator and a dissolution inhibitor, in which said dissolution inhibitor is a compound of the following formula (I): ##STR28##whereinA represents atoms necessary to complete a cyclic structure having no conjugated double bond which constitutes a matrix portion of the molecule of said dissolution inhibitor,SIG may be the same or different and each represents a dissolution inhibiting group capable of being released from said cyclic or acyclic structure A, to which said dissolution inhibiting group is directly or indirectly bonded, upon the action of an acid which is released from said photoacid generator, andm represents the number of said dissolution inhibiting groups SIG bonded to said structure A and is an integer of 1 or more, andsaid structure A of said compound of the dissolution inhibitor contains at least two lone pair-containing portions which can provide a hydrogen bond sufficient to shift and gather an alkali-soluble moiety of said base resin towards a side of said molecule of the dissolution inhibitor compound, andsaid lone pair-containing portion is a member selected from the group consisting of:(1) a double bonded oxygen atom-containing group of the following formula: ##STR29##(2) an alkoxy or alkoxycarbonyl group of the following formula:--OCH.sub.3, --OCH.sub.2 CH.sub.3, --OOCCH.sub.3, --OOCCH.sub.2 CH.sub.3, --OCCH.sub.3, --OCCH.sub.2 CH.sub.3, --COOCH.sub.3 or --COOCH.sub.2 CH.sub.3 ; and(3) a halogen atom including chlorine, fluorine, iodine and bromine,with the proviso that when the lone pair-containing portions are alkoxy or alkoxycarbonyl groups (2) at least three alkoxy or alkoxycarbonyl groups (2) are contained in the compound, and when the lone pair-containing portions are halogen atoms (3) at least three halogen atoms (3) are contained in the compound.