Method of manufacturing organic light emitting display device using organic layer deposition apparatus

A method of manufacturing an organic light-emitting display device, the method comprising:

• loading an alignment master member on a moving unit;
• pre-aligning an organic layer deposition assembly to the alignment master member positioned as is after the loading of the alignment master member, wherein the moving unit moves in a moving direction over the organic layer deposition assembly and the alignment master member is unloaded after the pre-aligning of the organic layer deposition assembly to the alignment master member;
• loading, after the pre-aligning of the organic layer deposition assembly, a substrate on the moving unit;
• before the moving unit on which the substrate is held moves over the deposition assembly along the moving direction, aligning the organic layer deposition assembly to the substrate positioned as is after the loading of the substrate;
• and
• forming an organic layer on the substrate while the moving unit is moving along the moving direction,
• wherein while the moving unit is moving along the moving direction, the organic layer deposition assembly is adjusted so that an interval between the organic layer deposition assembly and part of the substrate is maintained as substantially constant, wherein the part of the substrate receives a deposition material emitted from the organic layer deposition assembly to form the organic layer.