Patent ID: 6245485
Filing Date: 2001-06-12
Classification: G03F,Y10S

Abstract:
A positive resist composition exposable using far ultraviolet radiation having a wavelength of 220 nm or less, comprising (A) a compound generating an acid on irradiation with an active light ray or radiation, (B) a resin having a polycyclic alicyclic group and a carboxyl group, said resin being selected from the group consisting of (1) resins having at least one repeating structural unit having a polycyclic alicyclic group on a side chain thereof represented by the following formula (XXII), (XXIII) or (XXIV), and (2) resins containing at least one repeating structural unit having an alicyclic group on the main chain represented by the following formula (II) or (III), and (C) a compound represented by the following formula (XIV): ##STR74##wherein R.sub.104, R.sub.105, R.sub.107, R.sub.108 and R.sub.109 may be the same or different and each represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group or haloalkyl group which groups optionally have a substituent; R.sub.106 represents a cyano group, --CO--OR.sub.110 or --CO--N(R.sub.111)(R.sub.112); X.sub.101, X.sub.102 and X.sub.103 may be the same or different and each represents a single bond, a divalent alkylene group, alkenylene group or cycloalkylene group which groups optionally have a substituent, --O--, --SO.sub.2 --, --CO--R.sub.113 --, --CO--O--R.sub.114 -- or --CO--N(R.sub.115)--R.sub.116 --; R.sub.110 represents a hydrogen atom, an alkyl group, cycloalkyl group or alkenyl group which groups optionally have a substituent, or a group capable of decomposing by the action of an acid to increase solubility of the resin in an alkali developer; R.sub.111, R.sub.112 and R.sub.115 may be the same or different and each represents a hydrogen atom, an alkyl group, cycloalkyl group or alkenyl group which groups optionally have a substituent, or R.sub.111 and R.sub.112 may be combined to form a ring; R.sub.113, R.sub.114, and R.sub.116 may be the same or different and each represents a single bond or a divalent alkylene group, alkenylene group or cycloalklene group which may have an ether group, an ester group, an amido group, a urethane group or a ureido group; and Y represents a polycyclic alicyclic group; ##STR75##wherein R.sub.4, R.sub.5, R.sub.6 and R.sub.7 each independently represents a hydrogen atom, a halogen atom, a cyano group a hydroxy group, an alkyl group, a haloalkyl group, an alkoxy group, --CO--OR.sub.38 or a carboxy group, or at least two of R.sub.4 to R.sub.7 may be combined to form an alklene group having from 1 to 5 carbon atoms which may contain a hetero atom; R.sub.38 represents an alkyl group, cyloalkyl group or alkenyl group which may have a substituent, or a group capable of decomposing by the action of an acid; A.sub.1, A.sub.2 and A.sub.3 each independently represents a divalent alkylene group, alkenylene group or monocyclic or polycyclic cycloalkylene group which may have a substituent; X represents a single bond, a divalent alkylene group an alkenylene group or --SO.sub.2 --: and p and q each independently represents 0 or an integer from 1 to 4; and ##STR76##wherein R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each represents a hydrogen atom or an alkyl group or cycloalkyl group which groups optionally have a substituent or two of R.sub.1 to R.sub.3 may be combined to form a ring structure comprising from 3 to 8 carbon atoms or hetero atoms; Z represents an oxygen atom, a sulfur atom, --SO.sub.2 -- or --NH--; R represents an m-valent alkylene group, m-valent cycloalkylene group or m-valent group obtained by combining two or more of these groups, which may contain a hetero atom and may form a divalent or greater valent linking group together with at least one of an ether group, an ester group, an amido group, a urethane group or a ureido group, and m represents an integer of 2 or more;and wherein the resin as component (B) and the compound as component (C) are crosslinked, and the crosslinked product of the resin as component (B) and the compound as component (C) is insoluble in an alkali developer and is decomposable by the acid generated on irradiation with an active light ray or radiation to increase the solubility of the crosslinked product in an alkali developer.