Patent ID: 8664016

Claim:
A method of manufacturing an organic light emitting device, the method comprising: preparing a substrate on which a first electrode that is reflective is disposed; preparing a first deposition source that discharges a host material for forming an emission layer of an organic light emitting diode toward the prepared substrate in a first deposition region, and a second deposition source that discharges a dopant material for forming an emission layer of an organic light emitting diode toward the prepared substrate in a second deposition region; adjusting the first deposition source and the second deposition source to form a combined deposition region, wherein the combined deposition region comprises an overlap region formed where the first deposition region and the second deposition region overlap; driving the first deposition source and the second deposition source to deposit the host material and the dopant material on the first electrode of the substrate, thereby forming an organic emission layer, wherein the organic emission layer comprises a first emission layer comprising a mixed layer that contains the deposited host material and the deposited dopant material, and a second emission layer comprising only the deposited host material and being stacked on the first emission layer, the first deposition source and the second deposition source simultaneously performing deposition in the respective first and second deposition regions; and forming a second electrode that is optically transmissible on the formed organic emission layer.