Patent ID: 6903377
Filing Date: 2005-06-07
Classification: H01L

Abstract:
1. A light emitting device comprising: a thin film transistor over an insulating surface comprising: a first inorganic insulation layer under the semiconductor layer; a second inorganic insulation layer over the gate electrode; a first organic insulation layer over the second inorganic insulation layer; a third inorganic insulation layer over the first organic insulation layer; a wiring layer extending over the third inorganic insulation layer; a second organic insulation layer overlapping with an end of the wiring layer, the second organic insulation layer having an inclined surface with continuously varying curvatures; a fourth inorganic insulation layer formed over an upper surface and a side surface of the second organic insulation layer, the fourth inorganic insulation layer having an opening over the wiring layer; a cathode layer formed over the wiring layer, the cathode layer having an end overlapping with the fourth inorganic insulation layer; a light emitting layer comprising an organic material formed over the cathode layer and the fourth inorganic insulation layer; an anode layer formed over the light emitting layer comprising an organic material; and a fifth inorganic insulation layer formed over the anode layer, wherein the light emitted from the light emitting material is visible through the fifth inorganic insulation layer and the anode, and wherein each of the third inorganic insulation layer and the fourth inorganic insulation layer comprises a material selected from the group consisting of silicon nitride and aluminum nitride.