Patent ID: 7821004

Claim:
A display device comprising: a pixel portion comprising: a transistor including a gate electrode and a semiconductor layer; a first wiring on a same surface as the gate electrode; a first electrode over the first wiring, and electrically connected to the first wiring and the semiconductor layer, the first electrode comprising a first titanium film, a first aluminum film over the first titanium film and a second titanium film over the first aluminum film; a second electrode on a same surface as the first electrode, and electrically connected to the semiconductor layer; and a pixel electrode over the second electrode, and electrically connected to the second electrode; and an external input terminal portion comprising: a second wiring on the same surface as the gate electrode; and a third wiring over the second wiring, and electrically connected to the second wiring, the third wiring comprising a third titanium film, a second aluminum film over the third titanium film and a fourth titanium film over the second aluminum film.