Patent ID: 8692254
Filing Date: 2014-04-08
Classification: H01L

Abstract:
1. An organic light-emitting display device comprising: a lower capacitor electrode and an active layer formed on a substrate, the lower capacitor electrode and the active layer comprising a semiconductor material doped with ion impurities; a first insulating layer in direct contact with and covering the active layer and the lower capacitor electrode; a first gate electrode formed directly on the first insulating layer over the active layer; a second gate electrode formed directly on the first gate electrode, the second gate electrode comprising a conductive material with a different etching selectivity ratio from the first gate electrode; an upper capacitor electrode, comprising the same material and on the same layer as the first gate electrode, formed directly on the first insulating layer over the lower capacitor electrode; a second insulating layer in direct contact with and covering the first and second gate electrode and the upper capacitor electrode; a first contact hole and a second contact hole formed through the first and second insulating layers; source and drain electrodes formed directly on the second insulating layer and electrically connected to the active layer via the first and second contact holes, respectively; one of the source and drain electrodes being extended on the second insulating layer so as to cover an area comprised of an entire portion where the upper capacitor electrode is formed, the extended one of the source and drain electrodes forming a pixel electrode; a light-emitting layer positioned on the pixel electrode; and an opposite electrode facing the pixel electrode, wherein the light-emitting layer is disposed between the opposite electrode and the pixel electrode.