Patent ID: 6962766
Filing Date: 2005-11-08
Classification: G03F

Abstract:
1. A positive photoresist composition comprising: (A) a compound capable of generating an acid upon irradiation with one of an actinic ray and a radiation; (B) a resin capable of decomposing by the action of an acid to increase the solubility in an alkali, in which the resin contains a repeating unit having at least one of groups represented by formulae (I-1) to (I-4) below and a repeating unit containing an alkali-soluble group protected by at least one of groups containing an alicyclic hydrocarbon structure, which are represented by formulae (pI) to (pVI) below; and (C) at least one compound selected from the group consisting of: a compound represented by formula (CI) below; a compound represented by formula (CII) below; and a compound containing at least two structures, each of which includes a polycyclic structure represented by formula (CIII) below, wherein the polycyclic structure has at least one substituent containing a carboxylic acid group protected by an acid-labile group: wherein R wherein R 11 represents methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl or sec-butyl group; Z represents an atomic group necessary to form an alicyclic hydrocarbon group having 7 to 25 carbon atoms together with the carbon atom; R 12 to R 16 each independently represents a straight chain or branched alkyl group having 1 to 4 carbon atoms or an alicyclic hydrocarbon group, and at least one of R 12 to R 14 , or at least one of R 15 and R 16 represents an alicyclic hydrocarbon group; R 17 to R 21 each independently represents a hydrogen atom, a straight chain or branched alkyl group having 1 to 4 carbon atoms or an alicyclic hydrocarbon group, and at least one of R 17 to R 21 represents an alicyclic hydrocarbon group; R 19 or R 21 represents a straight chain or branched alkyl group having 1 to 4 carbon atoms, or an alicyclic hydrocarbon group; R 22 to R 25 each independently represents a straight chain or branched alkyl group having 1 to 4 carbon atoms or an alicyclic hydrocarbon group, and at least one of R 22 to R 25 represents an alicyclic hydrocarbon group; wherein X represents an oxygen atom, a sulfur atom, —N(R 53 )— or a single bond; R 51 , R 52 and R 53 each independently represents a hydrogen atom or an alkyl group; R′ represents a group necessary to form an acid-decomposable group of —COOR′; R represents a n1-valent residue containing a bridge-containing hydrocarbon, a saturated cyclic hydrocarbon or a naphthalene ring; n1 represents an integer of 1 to 4; q1 represents an integer of 0 to 10; R 60 represents an alkyl group or a halogen atom; R 61 , represents a group necessary to form an acid-decomposable group of —O—R 61 ; m1 represents an integer of 0 to 4; p1 represents an integer of 1 to 4.