Patent ID: 8916863
Filing Date: 2014-12-23
Classification: H01L

Abstract:
1. An organic thin-film transistor manufacturing method, comprising: forming a gate electrode above a substrate; forming a gate insulator above the gate electrode; forming a source electrode and a drain electrode spaced apart above the gate insulator; forming a sacrificial layer above the source electrode and the drain electrode; forming a partition wall layer above the sacrificial layer; forming an opening by patterning the partition wall layer to expose the gate insulator between the source electrode and the drain electrode and expose a part of the sacrificial layer above the source electrode and the drain electrode; removing the exposed part of the sacrificial layer to expose the source electrode and the drain electrode; and forming, in the opening, an organic semiconductor layer to cover exposed top surfaces of the source electrode and the drain electrode and a top surface of the gate insulator, wherein the exposed top surfaces of the source electrode and the drain electrode in the opening occupy 50% or more of a surface area of the opening, the source electrode and the drain electrode are spaced apart at an interval which is smaller than an average granular diameter of crystals each of which is at least partly positioned above at least one of the source electrode and the drain electrode among the crystals of the organic semiconductor layer, and in a top plan view, the source electrode exposed in the opening and the gate electrode overlap in a first area, the drain electrode exposed in the opening and the gate electrode overlap in a second area, and each of the first and second areas has, along a channel direction, a side having a length larger than the interval between the source electrode and the drain electrode.