Patent ID: 8048699

Claim:
A method of fabricating an organic electroluminescent device, comprising: forming a switching element and a driving element connected to each other on a substrate including a pixel region; forming gate and data lines connected to the switching element and crossing each other to define the pixel region; forming a power line crossing one of the gate line and the data line; forming a planarization layer on the switching element and the driving element, the planarization layer having a substantially flat top surface; forming a passivation layer of an inorganic insulating material between the planarization layer and the switching element and between the planarization layer and the driving element; forming a cathode on the planarization layer, the cathode connected to the driving element; forming an electron injection layer on the cathode, forming an electron transport layer on the electron injection layer, forming an emitting layer on the electron transport layer, forming a hole transport layer on the emitting layer, forming a hole injection layer on the hole transport layer, forming a buffer layer on the hole injection layer, and forming an anode on the buffer layer, wherein the cathode, the electron injection layer, the electron transport layer, the emitting layer, the hole transport layer, the hole injection layer, the buffer layer, and the anode are sequentially formed.