Patent ID: 7459849

Claim:
A display device comprising: a first electrode on an insulating surface; a conductive film on the insulating surface; an insulating film formed over the insulating surface to cover at least an edge portion of the first electrode and a first portion of the conductive film wherein the insulating film has an opening to expose a second portion of the conductive film; an electroluminescence film over said first electrode; and a second electrode over said electroluminescence film; wherein the second electrode contacts the second portion of the conductive film through the opening in the insulating layer, wherein the conductive film extends beyond a side edge of the second electrode, wherein the insulating film has sloped side surfaces in the opening of the insulating film and over the edge portion of the first electrode and a portion of the sloped side surfaces in a vicinity of a bottom surface of the insulating film is curved, wherein the insulating film has a bottom end portion which is in contact with an upper surface of the conductive film and a top end portion which is connected to an upper surface of the insulating film, and wherein the bottom end portion has a curved surface having a first radius of a curvature and a center of curvature located above the conductive film, and the top end portion has a curved surface having a second radius of a curvature and a center of curvature located below the upper surface of the insulating film.