Patent ID: 8664051

Claim:
A manufacturing method of a thin-film transistor, comprising: providing a substrate; forming a gate electrode and a gate insulating layer covering the gate electrode on the substrate; forming an active layer disposed on the gate insulating layer, wherein the active layer is above the gate electrode; forming an insulating metal oxide layer covering the active layer disposed on the gate insulating layer, wherein the insulating metal oxide layer comprises a metal oxide material of a first metal; forming a metal layer covering the active layer disposed on the insulating metal oxide layer, wherein the metal layer comprises a second metal different from the first metal; forming a source electrode and a drain electrode deposed on the metal layer, wherein the source electrode and the drain electrode above the active layer are separated from each other by a trench to be respectively located at two opposite sides of the gate electrode, wherein the trench exposes a portion of the metal layer; removing the portion of the metal layer exposed by the trench to expose the insulating metal oxide layer by the trench; and performing an annealing process to the metal layer and the insulating metal oxide layer, such that the metal layer reacts with the insulating metal oxide layer overlapping the metal layer to form a conducting composite metal oxide layer comprising the first metal and the second metal, wherein the conducting composite metal oxide layer connects with the active layer and the source electrode, and connects with the active layer and the drain electrode.