Patent ID: 7531286
Filing Date: 2009-05-12
Classification: G03F,Y10S

Abstract:
1. A radiation-sensitive resin composition comprising: (A) a resin insoluble or scarcely soluble in alkali but which becomes alkali soluble by the action of an acid, comprising: a recurring unit (1-1) shown in the following formula (1), wherein R A each R R n is 0 or 1; and at least one recurring unit having a lactone skeleton selected from the group consisting of a recurring unit (2-2) and a recurring unit (2-3) shown in the following formula (2), wherein: R B is a methylene group, an oxygen atom, or a sulfur atom; R R R (B) 1-(4-n-butoxynaphthalen-1-yl)tetrahydrothiophenium nonafluoro-n-butanesulfonate as a photoacid generator; wherein the resin (A) further comprises a recurring unit of the following formula (3): wherein R 12 represents a hydrogen atom or a methyl group, Y indicates a hydrocarbon group with a valence m having 12 or less carbon atoms that may be substituted with fluorine atoms, D represents a polar group having a valence (m- 1 ), and m is 2 or 3.