Heat-resistant negative photoresist composition, photosensitive substrate, and process for forming negative pattern

摘要

A photoresist composition which can form a negative pattern with good heat resistance upon irradiation with actinic rays can be prepared by adding a 4-(2'-nitrophenyl)-1-alkyl (or alkoxyl)-4-dihydropyridine as a photosensitive compound which shows basicity by the irradiation with actinic rays to a resin component comprising a polyimide precursor having a specific structure.