Patent ID: 7572478

Claim:
A method of manufacturing a light emitting device comprising the steps of: providing a film formation apparatus; forming a first electrode over a substrate in the film formation apparatus; forming an EL layer over the first electrode in the film formation apparatus, wherein the EL layer comprises a hole injecting layer, a hole transporting layer, and a light emitting layer; forming a second electrode over the EL layer in the film formation apparatus; forming an absorption film over the EL layer in the film formation apparatus so as to cover the EL layer; forming a passivation film so as to cover the absorption film in the film formation apparatus; sealing a region which is covered with the passivation film by using a sealant and a sealing substrate in the film formation apparatus; and covering the sealant and the sealing substrate with a metallic film under atmospheric pressure, wherein the substrate is prevented from contacting an air outside of the film formation apparatus after the formation of the EL layer and until the formation of the absorption film is finished, and wherein the metallic film is formed by an evaporation method.