Method for manufacturing thin-film transistor and thin-film transistor manufactured with same

The present invention provides a method for manufacturing a thin-film transistor and a thin-film transistor manufactured with same. The method includes (1) providing a substrate; (2) forming a first metal layer on the substrate and applying a masking operation to form a gate terminal; (3) forming a gate insulation layer on the gate terminal; (4) forming an oxide semiconductor layer on the gate insulation layer and forming a second metal layer on the oxide semiconductor layer, wherein the second metal layer includes a titanium layer formed on the oxide semiconductor layer and a copper layer formed on the titanium layer and is subjected to a masking operation to form a data line and source/drain terminal; and (5) forming a transparent conductive layer on the second metal layer and applying a masking operation to patternize the transparent conductive layer to form the thin-film transistor.