Patent ID: 8349537

Claim:
A photosensitive ink composition for screen printing, said ink composition comprising: 100 parts by weight of an organic solvent-soluble polyimide block copolymer(s); and 1 to 100 parts by weight of a photoacid generator(s), said polyimide block copolymer(s) and said photoacid generator(s) being dissolved in an organic solvent, said polyimide block copolymer(s) containing in its molecular skeleton a diamine having a siloxane bond(s), and an aromatic diamine having a hydroxyl group(s) and/or carboxyl group(s) at ortho-position with respect to an amino group; and wherein the content of said diamine(s) having a siloxane bond in the molecular skeleton thereof is 15 to 85% by weight based on the total diamine components, and the content of said aromatic diamine(s) having said hydroxyl group(s) and/or carboxyl group(s) is 5 to 20% by weight based on the total diamine components.