Patent ID: 8796692
Filing Date: 2014-08-05
Classification: H01L

Abstract:
1. A thin-film semiconductor device comprising: a substrate; a gate electrode above the substrate; a gate insulating film above the gate electrode; a channel layer above the gate insulating film, the channel layer comprising a polycrystalline semiconductor; a first amorphous semiconductor layer above the channel layer; an organic insulating layer above the first amorphous semiconductor layer; a pair of second amorphous semiconductor layers, one of which is positioned at a side surface on one side of the first amorphous semiconductor layer and a side surface on one side of the channel layer, and the other of which is positioned at a side surface on the other side of the first amorphous semiconductor layer and a side surface on the other side of the channel layer; a pair of contact layers above the pair of second amorphous semiconductor layers, the pair of contact layers contacting the side surfaces of the channel layer via the pair of second amorphous semiconductor layers; a source electrode above one of the pair of contact layers; and a drain electrode above the other of the pair of contact layers, wherein the gate electrode, the channel layer, the first amorphous semiconductor layer, and the organic insulating layer have outlines that coincide with one another in a top view, the first amorphous semiconductor layer has a density of localized states higher than a density of localized states of the pair of second amorphous semiconductor layers, and the pair of second amorphous semiconductor layers has a band gap larger than a band gap of the first amorphous semiconductor layer.