Patent ID: 7312572

Claim:
An EL display device comprising: a pixel portion and a driving circuit formed over a substrate; plural pixels formed in the pixel portion, wherein the plural pixels are controlled by the driving circuit; a switching TFT and a current-control TFT formed in one of the plural pixels; a first interlayer insulating film formed over the switching TFT and the current-control TFT; an EL element electrically connected to the current-control TFT, the EL element comprising a first electrode formed over the first interlayer insulating film, a second electrode formed over the first electrode and an EL layer between the first and second electrodes, and a second interlayer insulating film formed over the first interlayer insulating film, wherein the second interlayer insulating film overlaps an edge of the first electrode and the EL layer extends over at least an edge of the second interlayer insulating film, and wherein the edge of the second interlayer insulating film has a tapered shape.