Mask assembly and deposition apparatus for display device including the same

A deposition apparatus for a display device, comprising:

• a chamber in which a display substrate is disposed;
• a mask assembly opposite to the display substrate in the chamber;
• and
• a deposition source opposite to the mask assembly in the chamber,
• wherein the mask assembly comprises:
• a support frame that includes at least four sides;
• a first frame disposed on the support frame and extending in a first direction;
• a second frame disposed on the support frame and extending in a second direction intersecting the first direction;
• and
• a mask sheet disposed on the support frame and including at least one opening, and
• at least one of the four sides of the support frame includes:
• a first protruding portion disposed at a first edge of the side;
• a second protruding portion disposed at a second edge of the side;
• and
• a recess portion disposed between the first protruding portion and the second protruding portion,
• wherein, in a cross-sectional view, the first protruding portion has an outer surface inclined toward an opening of the support frame, and wherein the second protruding portion has an inner surface,
• wherein, in the cross-sectional view, the outer surface extends from the recess portion to an upper surface of the first protruding portion in a first inclination direction, and the inner surface of the second protruding portion extends from the recess portion to an upper surface of the second protruding portion in a second inclination direction, and
• wherein the first inclination direction forms a first obtuse angle with respect to the recess portion, and the second inclination direction forms a second obtuse angle with respect to the recess portion.