Patent ID: 7648816
Filing Date: 2010-01-19
Classification: C07C,G03F,Y10S

Abstract:
1. A positive resist composition, comprising: a base material component (A) that contains an acid-dissociable, dissolution-inhibiting group and exhibits increased alkali solubility under action of acid; and an acid generator component (B) that generates acid upon exposure, wherein said base material component (A) comprises a compound (A1), in which either a portion of, or all of, hydrogen atoms of phenolic hydroxyl groups within a polyhydric phenol compound with a molecular weight of 300 to 2,500 represented by a general formula (I) shown below have been substituted with at least one group selected from the group consisting of acid-dissociable, dissolution-inhibiting groups represented by a general formula (II) shown below and acid-dissociable, dissolution-inhibiting groups represented by a general formula (III) shown below: [wherein, R 1 to R 6 each represent, independently, an alkyl group of 1 to 10 carbon atoms or an aromatic hydrocarbon group, which may include a hetero atom within a structure thereof; a represents an integer of 1 or greater, and b and c each represent, independently, either 0 or an integer of 1 or greater, provided that at least one of b or c is an integer of 1 or greater, and a+b+c is no greater than 4; d represents an integer of 1 or greater, and e and f each represent, independently, either 0 or an integer of 1 or greater, provided that d+e+f is no greater than 4; g represents an integer of 1 or greater, and h and i each represent, independently, either 0 or an integer of 1 or greater, provided that at least one of h or i is an integer of 1 or greater, and g+h+i is no greater than 4; j represents 2; and k represents an integer from 1 to 3]; [wherein, R 7 and R 8 each represent, independently, a straight-chain, branched, or cyclic alkyl group, which may include a hetero atom within a structure thereof; R 9 represents a hydrogen atom or a lower alkyl group; and n′ represents an integer from 1 to 3].