Negative working photoresist composition

摘要

A negative working photoresist composition which has high suitability for exposure to far ultraviolet and comprises an alkali-soluble resin, a compound capable of generating an acid upon irradiation with actinic rays or radiations, and a compound capable of lowering the solubility of the alkali-soluble resin in a developer in the presence of the acid, the alkali-soluble resin comprising a polymer containing at least the repeating units derived from norbornene skeleton-containing monomers and crosslinking groups.