Patent ID: 6956240

Claim:
A light emitting device comprising: a thin film transistor formed over an insulating surface; an interlayer insulating film formed over the thin film transistor; a pixel electrode formed on the interlayer insulating film; an insulating film covering at least one edge portion of the pixel electrode; a cathode formed on at least the pixel electrode; an organic compound layer formed on at least the cathode; a protective film formed on at least the organic compound layer; and an anode formed on at least the protective film; wherein the thin film transistor comprises a source region and a drain region, and the pixel electrode is electrically connected to either one of the source region or the drain region in an opening formed in the interlayer insulating film, wherein a mixture region is formed between the organic compound layer and the protection film, and wherein the mixture region comprises an organic compound that constitutes the organic compound layer and a metal that constitutes the protection film.