Patent ID: 8344379

Claim:
A display device comprising: a semiconductor film; a gate wire; a gate insulating film interposed between the semiconductor film and the gate wire; and a source or drain wire electrically connected to the semiconductor film, wherein the gate wire comprises: a first conductive film; a second conductive film over the first conductive film so that a width of the second conductive film is smaller than a width of the first conductive film; and a third conductive film over the first conductive film so as to cover a top surface and a side surface of the second conductive film, and wherein the source or drain wire comprises: a fourth conductive film; a fifth conductive film over the fourth conductive film so that a width of the fifth conductive film is smaller than a width of the fourth conductive film; and a sixth conductive film over the fourth conductive film so as to cover a top surface and a side surface of the fifth conductive film.