Patent ID: 6649322
Filing Date: 2003-11-18
Classification: G03F,Y10S

Abstract:
A positive resist composition comprising:(A) a compound which generates an acid upon irradiation with active light or radiant ray; and (B) a resin which exhibits increased solubility in an alkali by action of an acid, the resin including a copolymer comprising: (b-1) 40% to 85% by mole of a hydroxystyrene unit or &agr;-methylhydroxystyrene unit; (b-2) 3% to 25% by mole of a unit having (i) an acid-decomposable dissolution-inhibiting group and (ii) a group which accelerates dry-etching resistance; and (b-3) 3% to 40% by mole of a unit having an acid-decomposable dissolution-inhibiting group and being other than the units (b-1) and (b-2).