Patent ID: 6960786

Claim:
A display device comprising: a transistor formed over a substrate; and a light emitting element electrically connected with the transistor, the transistor comprising: an active layer comprising a semiconductor; a gate insulating film formed in contact with the active layer; a gate electrode adjacent to the active layer with the gate insulating film interposed therebetween; a planarization layer formed over the active layer; a barrier layer formed on the planarization layer; and a drain electrode formed on the barrier layer, the light emitting element comprising: a pixel electrode in contact with an upper surface of the drain electrode on the barrier layer; a light emitting member formed in contact with the pixel electrode; and an opposing electrode facing the pixel electrode through the light emitting member, wherein the drain electrode is electrically connected with the active layer through a first opening formed in the gate insulating film and the barrier layer and a second opening formed in the planarization layer, and wherein the barrier layer covers an upper surface of the planarization layer and a side surface of the second opening formed in the planarization layer.