Patent ID: 9627460
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A display device comprising: a substrate; a first transistor over the substrate, the first transistor comprising a semiconductor layer formed on an insulating surface and a gate electrode over the semiconductor layer, the semiconductor layer comprising a channel formation region comprising polycrystalline silicon; a driving circuit comprising a second transistor over the substrate, the second transistor comprising a semiconductor layer formed on the insulating surface; a first insulating film over the first transistor and the second transistor; a pixel electrode over the first insulating film and electrically connected to the first transistor; a light emitting layer over the pixel electrode, the light emitting layer comprising an organic compound; a second electrode over the pixel electrode so that the light emitting layer is disposed between the pixel electrode and the second electrode; a covering material over the second electrode; a first sealing material interposed between the substrate and the covering material, wherein the first sealing material is disposed along peripheries of the substrate and the covering material; and a second sealing material outside of and along the first sealing material, wherein the second sealing material is in contact with a side surface of the covering material.