Patent ID: 7488986

Claim:
A light emitting device, comprising: a TFT provided over an insulation surface, an interlayer insulating film formed over said TFT, a pixel electrode formed over said interlayer insulating film, an insulating film covering edge portions of said pixel electrode, a cathode formed over said pixel electrode, a layer comprising an organic compound and a hole injection layer formed over said cathode, a protector formed over said layer comprising said organic compound, and an anode formed over said protector, wherein said TFT comprises a source region and a drain region, said pixel electrode is electrically connected to either of said source region or said drain region at an opening formed in said interlayer insulating film, said protector comprises a material whose work function is in the range from 4.5 to 5.5 eV, and said hole injection layer is in contact with said protector.