Patent ID: 8631761

Claim:
A mask frame assembly for thin-film deposition, the mask frame assembly comprising: a mask frame having an opening defined therethrough, the mask frame configured to retain a mask; at least one supporter configured to contact the mask for supporting the mask; and a fixing unit coupled to the supporter and the mask frame, the fixing unit being positioned substantially perpendicularly to the supporter, wherein the mask frame includes a first pair of parallel and opposing frame sides and a second pair of parallel and opposing pair of frame sides, the second pair of frame sides extending between and connecting the first pair of frame sides, wherein opposing ends of the fixing unit are coupled to the first pair of frame sides such that the fixing unit is substantially parallel to the second pair of frame sides, and wherein the first pair of frame sides includes a gap control unit that separates the fixing unit from at least one of the second pair of frame sides by a predetermined gap g.