Apparatus for manufacturing display device, mask assembly, and method of manufacturing display device

A mask assembly comprising:

• a mask frame including an opening area;
• at least one shield stick fixed on the mask frame in a tensioned state across the opening area of the mask frame;
• and
• a plurality of mask sheets covering at least part of the opening area of the mask frame and at least partially overlapping the at least one shield stick, wherein
• the at least one shield stick comprises three or more shield members,
• two shield members of the three or more shield members are adjacent to each other and at least partially overlap each other, and
• at least one of the three or more shield members is disposed below the two shield members that are adjacent to each other.

A method of manufacturing a display device, the method comprising:

• disposing a display substrate and a mask assembly in a chamber;
• depositing a deposition material on the display substrate, the deposition material being supplied from a deposition source to pass through the mask assembly;
• and
• cleaning the mask assembly, wherein
• the mask assembly comprises:
• a mask frame including an opening area;
• at least one shield stick fixed on the mask frame in a tensioned state across the opening area of the mask frame;
• and
• a plurality of mask sheets covering at least part of the opening area of the mask frame and at least partially overlapping the at least one shield stick,
• the at least one shield stick comprises:
• a first shield member;
• a second shield member at least partially overlapping the first shield member;
• and
• a third shield member at least partially overlapping the first shield member, and
• the second shield member and the third shield member are disposed above the first shield member and are closer to the plurality of mask sheets than the first shield member is close to the plurality of mask sheets.