Patent ID: 7576359

Claim:
A liquid crystal display device comprising: a first semiconductor film formed over a gate electrode with a gate insulating film interposed therebetween; a first insulator and a second insulator that are formed over the first semiconductor film; a source region and a drain region that are separately formed over the first semiconductor film so as not to overlap the first insulator and the second insulator; a second semiconductor film formed over the first semiconductor film; a third semiconductor film formed over the first insulator and the second insulator; a source electrode and a drain electrode that are formed over the source region and the drain region; a first light shielding film formed over the first insulator with the third semiconductor film interposed therebetween; a source line formed over the second insulator with the third semiconductor film interposed therebetween; and a second light shielding film formed over the second semiconductor film, wherein the first insulator is formed between the source region and the drain region, wherein the source electrode is electrically connected to the source line, and wherein the source electrode, the drain electrode, the source line, the first light shielding film, and the second light shielding film are formed of the same light shielding conductive film.