Patent ID: 7378126

Claim:
A method of manufacturing a light-emitting device comprising: forming a first thin film transistor in a pixel portion and second and third thin film transistors in a driver circuit over a substrate; and forming an anode over the first thin film transistor; forming an organic compound layer over the anode by resistive heating; forming a lower layer of a cathode over the organic compound layer and the second thin film transistor by vapor deposition in which a deposition material is heated by resistive heating; and forming an upper layer of the cathode over the lower layer of the cathode by a different vapor deposition in which the same material as the deposition material is heated by an electron gun, wherein the second thin film transistor is overlapped with the lower layer of the cathode and the upper layer of the cathode, and wherein the third thin film transistor is not overlapped with the lower layer of the cathode and the upper layer of the cathode.