Patent ID: 8030125

Claim:
A method for manufacturing an organic thin-film transistor substrate, in which an organic thin-film transistor is formed in a first region on a substrate, a second region for forming a light-emitting element in abutment with the first region is included, and a bank part is formed in a peripheral part of the second region, the method being characterized by comprising: a first step of forming, in the first region on the substrate, the organic thin-film transistor provided at least with a gate electrode, a gate insulation layer, a source electrode and a drain electrode formed on a side of the gate insulation layer opposite to the gate electrode, and an organic semiconductor layer formed on a side of the gate insulation layer opposite to the gate electrode and having contact with both the source electrode and the drain electrode, and forming at least one of the gate insulation layer and the organic semiconductor layer as far as the second region, thereby forming, in the second region, a bank precursor layer composed of a laminated structure formed on the second region; and a second step of selectively removing the regions of the bank precursor layer other than the peripheral part, thereby forming the bank part made of the remaining bank precursor layer.