PHOTOSENSITIVE INK COMPOSITION FOR SCREEN PRINTING AND METHOD OF FORMING POSITIVE RELIEF PATTERN WITH USE THEREOF

摘要

A photosensitive ink that when used as an ink for screen printing, forms a film excelling in insulation, heat resistance, low warpage, low elasticity and adherence to base material, and that ensures low possibility of defects, such as screen mesh clogging, blur, thin spot and void, despite repeated screen printing, thus excelling in printing work performance. There is provided a photosensitive ink composition for screen printing, comprising an organic solvent and, dissolved therein, 100 parts by weight of organic-solvent-soluble block copolymer polyimide and 1 to 100 parts by weight of photoacid generator. The block copolymer polyimide contains, as at least moiety of the diamine component, a diamine having a siloxane bond in its molecular skeleton and an aromatic diamine having hydroxyl and/or carboxyl in the ortho position to amino.