Patent ID: 9431543
Filing Date: 2016-08-30
CPC Classification: H01L

Claim Text:
1. A thin-film semiconductor device comprising: a substrate; a gate electrode above the substrate; a gate insulation film above the gate electrode; a channel layer above the gate insulation film, the channel layer having a raised part; a channel protection layer over the raised part of the channel layer, the channel protection layer comprising an organic material including a surface active agent and a photosensitizing agent, wherein the organic material includes silicon, oxygen, and carbon as a part of the surface active agent and the photosensitizing agent; an interface layer at an interface between a top surface of the raised part of the channel layer and the channel protection layer, the interface layer comprising at least carbon and silicon, and the carbon having a higher concentration than a concentration of carbon in the channel protection layer; and a source electrode and a drain electrode each of which is provided over (a) a top surface and a side surface of a corresponding one of ends of the channel protection layer, (b) a side surface of the interface layer which continues into the side surface of the channel protection layer, (c) a side surface of the raised part of the channel layer which continues into the side surface of the interface layer, and (d) a top surface of the channel layer which continues into the side surface of the raised part of the channel layer, wherein the concentration of the carbon included in the interface layer is at least fifty times as much as a concentration of carbon included as impurity in the channel layer.