Patent ID: 7150956
Filing Date: 2006-12-19
Classification: G03F,Y10S

Abstract:
1. A chemical amplification type positive resist composition comprising the following components (A) and (B): (A) polyhydroxystyrene in which at least a portion of hydrogen atoms of hydroxyl groups are substituted with an acid-dissociable dissolution inhibiting group, and the solubility in an alkali solution of the polyhydroxystyrene increasing when the acid-dissociable dissolution inhibiting group is eliminated by an action of an acid, and (B) a component capable of generating an acid by irradiation with radiation, wherein a retention rate of the acid-dissociable dissolution inhibiting group of the component (A) after a dissociation test using hydrochloric acid is 40% or less, and wherein the component (B) comprises bisalkylsulfonyldiazomethane as a main component, and comprises an onium salt in an amount of 2 to 5% by weight based on the bisalkylsulfonyldiazomethane.