US Patent 7692188 Display device and manufacturing method thereof

A display device includes an insulation substrate, a source electrode and a drain electrode disposed on the insulation substrate and distanced from each other and including a channel area interposed therebetween, a wall exposing portions of the source electrode and the drain electrode, and defining an opening area surrounding the channel area, and an organic semiconductor layer covering the channel area, and comprising a first sub layer and a second sub layer having different grain sizes.