Patent ID: 7687809

Claim:
A display device comprising: a substrate; a thin film transistor formed over the substrate, the thin film transistor including a gate electrode adjacent to a gate insulating film; a first electrode for a capacitor formed over the substrate; a first insulating film formed over the thin film transistor and the first electrode wherein the first insulating film has a first hole; a second insulating film formed over the first insulating film wherein the second insulating film has a second hole over the first hole and a third hole over the first electrode; and a pixel electrode formed over the second insulating film wherein the pixel electrode is electrically connected to the thin film transistor through the first hole and the second hole and the pixel electrode overlaps the third hole to form the capacitor between the first electrode and the pixel electrode with a portion of the first insulating film interposed therebetween, wherein a top edge of the first hole is located inside the second hole, and wherein the first insulating film has a different etching characteristic from the second insulating film.