Mask frame assembly, method of manufacturing the same, and method of manufacturing organic light-emitting display apparatus

A method of manufacturing a mask frame assembly, the method comprising:

• preparing a frame;
• preparing a mask, the mask including:
• a deposition pattern portion having a plurality of pattern holes therethrough, such that a deposition material passing through the pattern holes in a second direction is deposited on a substrate, and
• a dummy portion extending from the deposition pattern portion in the first direction, the dummy portion having an increased thickness in the second direction as a distance from the deposition pattern portion in the first direction increases;
• and
• installing the mask on the frame while tensioning both ends of the mask in the first direction.

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

• forming a first electrode and a second electrode that are opposite to each other on a substrate;
• forming an organic layer between the first electrode and the second electrode,
• wherein the organic layer or the second electrode is deposited by using a mask frame assembly including:
• a frame, and
• a mask tensioned on the frame in a first direction, the mask including:
• a deposition pattern portion having a plurality of pattern holes therethrough, such that a deposition material passing through the pattern holes in a second direction is deposited on a substrate, and
• a dummy portion extending from the deposition pattern portion in the first direction, the dummy portion having an increased thickness in the second direction as a distance from the deposition pattern portion in the first direction increases.