Patent ID: 8013327

Claim:
An electronic device having a thin-film transistor, the thin-film transistor comprising: an insulating substrate; a source electrode, and a drain electrode, disposed over the top of the insulating substrate; a semiconductor layer electrically continuous with the source electrode, and the drain electrode, respectively; a gate dielectric film formed over the top of at least the semiconductor layer; and a gate electrode disposed over the top of the gate dielectric film so as to overlap the semiconductor layer, wherein a first bank insulator is formed so as to overlie the source electrode, a second bank insulator is formed so as to overlie the drain electrode, and the semiconductor layer, the gate dielectric film, and the gate electrode are embedded in a region between the first bank insulator, and the second bank insulator; wherein the first and second bank insulators are formed to have a plurality of sidewall faces which have inverse taper shapes against the insulating substrate, and the semiconductor layer is formed such that respective sidewall faces thereof are butted against a sidewall face of the source electrode, and a sidewall face of the drain electrode, while overlying the source electrode, and the drain electrode.