Patent ID: 7005230
Filing Date: 2006-02-28
Classification: G03F,Y10S

Abstract:
1. A radiation-sensitive resin composition comprising: (A) a resin which comprises at least one recurring unit selected from the group consisting of recurring units (I-1), (I-2), and (I-3) shown by the following formula (1), and a recurring unit (II) shown by the following formula (2), and is insoluble or scarcely soluble in alkali, but becomes alkali soluble by action of an acid, wherein R 1 , R 3 , and R 5 individually represent a hydrogen atom or a methyl group, and R 2 , R 4 , and R 6 individually represent a hydrogen atom or a linear or branched alkyl group having 1–4 carbon atoms, X represents a methylene group, an oxygen atom, or a sulfur atom, and a is an integer of 1–5, wherein R 7 represents a hydrogen atom or a methyl group, each R 8 individually represents a monovalent alicyclic hydrocarbon group having 4–20 carbon atoms or a derivative thereof, or a linear or branched alkyl group having 1–4 carbon atoms, provided that at least one R 8 represents a monovalent alicyclic hydrocarbon group having 4–20 carbon atoms or a derivative thereof, or two R 8 s form, in combination with the carbon atom to which the two R 8 s bond, a divalent alicyclic hydrocarbon group having 4–20 carbon atoms or a derivative thereof, with the remaining R 8 being a linear or branched alkyl group having 1–4 carbon atoms or a monovalent alicyclic hydrocarbon group having 4–20 carbon atoms or a derivative thereof; (B) a photoacid generator; and (C) a polycyclic compound selected from the group consisting of compounds shown by the following formulae(5) to (8): wherein R 9 is the same as defined for the formula (4), Z represents a hydrocarbon group with a valence of m which has a polycyclic carbon ring in which the number of carbon atoms which make up the ring is 6–20 or a derivative thereof, and m is an integer of 1–4; wherein R 9 is the same as defined for the formula (4); wherein R 9 is the same as defined for the formula (4) and R 11 and R 12 individually represent a hydrogen atom, a linear or branched alkyl group having 1–4 carbon atoms, a linear or branched hydroxyalkyl group having 1–4 carbon atoms, —OR 13 , wherein R 13 represents a hydrogen atom, a linear or branched alkyl group having 1–4 carbon atoms, or —CH 2 COOR 14 , wherein R 14 represents a hydrogen atom or an alkyl group having 1–4 carbon atoms, or —COOR 15 , wherein R 15 , represents a hydrogen atom, a substituted or unsubstituled alkyl group having 1–20 carbon atoms, or —CH 2 COOR 16 , wherein R 16 represents a hydrogen atom or an alkyl group having 1–18 carbon atoms, and n and p are integers of 0–2; wherein R 9 is the same as defined for the formula (4) and R 17 , R 18 , R 19 , and R 20 individually represent a hydrogen atom, a hydroxyl group, a linear or branched alkyl group having 1–4 carbon atoms, or a linear or branched alkoxyl group having 1–4 carbon atoms.