Patent ID: 6528229
Filing Date: 2003-03-04
Classification: G03F,Y10S

Abstract:
A positive photoresist composition which comprises (A) a resin which contains a repeating unit represented by formula (I) shown below and a repeating unit represented by formula (II) shown below and whose solubility in an alkaline developing solution increases by the action of an acid and (B) a compound which generates an acid upon irradiation with an actinic ray or radiation, wherein R1, R2 and R3, which may be the same or different, each independently represents an alkyl group, a haloalkyl group, a halogen atom, an alkoxy group, a trialkylsilyl group or a trialkylsilyloxy group; and n represents 0 or 1, wherein M represents an atomic group necessary for forming an alicyclic structure, which may be substituted, together with the connected two carbon atoms (Câ€”C) ; and R11 and R12, which may be the same or different, each independently represents a hydrogen atom, a cyano group, a halogen atom or an alkyl group which may be substituted.