Patent ID: 7501652

Claim:
A thin-film transistor structure comprising: an insulating substrate; a gate electrode on said insulating substrate; a dielectric layer over said gate electrode; a first semiconductive layer on said dielectric layer; a second semiconductive layer on said first semiconductive layer; a first conductive layer on said second semiconductive layer; a second conductive layer on said first conductive layer, said second conductive layer is used as a source and a drain, said first conductive layer prevents said second conductive layer and said second semiconductive layer from diffusing into each other; and a third conductive layer on said second conductive layer, said third conductive layer is used as a glue layer and protects said second conductive layer from being over-etched, wherein said first, said second and said third conductive layers are made of alloy layers each having two same main metal components; wherein said second semiconductive layer, said first conductive layer, said second conductive layer and said third conductive layer have an opening therethrough and exposing said first semiconductive layer.