Thin-film transistor, thin-film transistor sheet and their manufacturing method

1. A thin-film transistor sheet comprising a substrate, a gate busline, an insulation layer, a gate electrode comprised of a fluid electrode material, a gate insulating layer, and a semiconductor layer, the gate electrode being formed in the insulation layer and being in contact with the gate busline, wherein the thin-film transistor sheet is manufactured by a process comprising: providing a gate busline on a substrate, providing, on the surface of the substrate on the gate busline side, an insulation layer capable of receiving a fluid electrode material, supplying the fluid electrode material to the insulation layer, the fluid electrode material being allowed to permeate the insulation layer, forming, in the insulating layer, a gate electrode from the permeated fluid electrode material to be in contact with the gate busline, forming a gate insulating layer on the gate electrode and forming a semiconductor layer on the gate insulating layer.

2. The thin-film transistor sheet of claim 1 , wherein the substrate is comprised of a resin.

3. The thin-film transistor sheet of claim 1 , wherein the fluid electrode material is a solution of an electrically conductive polymer or a dispersion liquid of an electrically conductive polymer.

4. The thin-film transistor sheet of claim 1 , wherein the semiconductor layer is comprised of an organic semiconductor material.