Patent ID: 9057948
Filing Date: 2015-06-16
Classification: G03F

Abstract:
1. A resist composition for EUV or EB comprising a base component (A) which generates acid upon exposure and exhibits changed solubility in a developing solution under action of acid, wherein the base component (A) comprises a polymer (A1) having a structural unit (a5) containing a group represented by general formula (a5-0-1) or general formula (a5-0-2) shown below, and an amount of a monomer that derives the structural unit (a5) is not more than 100 ppm by weight relative to the polymer (A1): wherein each of Q 1 and Q 2 independently represents a single bond or a divalent linking group, each of R 3 , R 4 and R 5 independently represents an organic group, and R 4 and R 5 may be bonded to each other to form a ring in combination with a sulfur atom in the formula, provided that a group —R 3 —S + (R 4 )(R 5 ) within the formula has a total of only one aromatic ring or has no aromatic rings, V represents a counter anion, A − represents an organic group containing an anion, and M m+ represents an organic cation having a valency of m, wherein m represents an integer of 1 to 3, provided that M m+ has only one aromatic ring or has no aromatic rings.