Deposition apparatus including mask assembly and shape correction method for mask assembly

A mask assembly comprising:

• a stage defining a stage-opening therein;
• a frame disposed on the stage, and defining a frame-opening therein corresponding to the stage-opening;
• a mask coupled to the frame, and defining a plurality of deposition openings therein corresponding to the frame-opening;
• alignment units coupled to the stage;
• and
• correction units each of which includes a magnetic force part disposed on the stage to be adjacent to the frame, and a driving part configured to provide a magnetic force to the magnetic force part, wherein the correction units are coupled to the stage,
• wherein the alignment units move a position of the frame on the stage, and the correction units change a shape of the frame.

A shape correction method for a mask assembly, comprising:

• disposing a frame, defining a frame-opening therein, on a stage to which alignment units and correction units are coupled;
• controlling a position of the frame on the stage by the alignment units;
• and
• correcting a shape of the frame by the correction units.