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

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

• forming a pixel electrode over a substrate;
• forming an intermediate layer over the pixel electrode by using a mask-frame assembly;
• and
• forming an opposite electrode over the intermediate layer,
• wherein the mask-frame assembly comprises:
• a frame including an opening portion;
• an open mask coupled to the frame and covering the opening portion, the open mask including a main portion including a plurality of openings located within the opening portion, a first rib connected to the main portion and extending in a first direction away from a center of the main portion, a second rib connected to the main portion and extending in a second direction that crosses the first direction and extending away from the center of the main portion, and a first bridge portion connecting a first edge of the first rib in a direction toward the second rib to a second edge of the second rib in a direction toward the first rib;
• and
• a plurality of mask sticks overlapping the open mask, each of the plurality of mask sticks having opposite ends coupled to the frame,
• wherein each of the plurality of mask sticks includes a plurality of holes.

A mask-frame assembly, comprising:

• a frame including an open portion;
• and
• an open mask coupled to the frame, the open mask including a first rib extending in a first direction, a second rib extending in a second direction that is different from the first direction, and a bridge portion that connects the first rib and the second rib, the bridge portion having a curved shape,
• wherein the open mask further includes a plurality of openings.