US Patent 11316111 Method for manufacturing display device using a mask frame

A mask assembly for manufacturing a display device, the mask assembly includes: a mask frame including a pair of first side portions arranged in a first direction, a pair of second side portions arranged in a second direction intersecting the first direction, and an opening portion defined by the first side portions and the second side portions; a mask sheet arranged on the opening portion of the mask frame, fixed on the mask frame, and including a plurality of openings; and a support member attached to at least one of the first side portions and the second side portions of the mask frame with tensile force applied.