Patent ID: 8550032

Claim:
A thin-film deposition mask assembly of a flat panel display, comprising: a frame comprising an opening; a first change compensating member and a second change compensating member disposed across the opening, fixed to a free end member formed by partial cut-outs of the frame from the opening, and arranged as a pair; and a plurality of division masks being disposed to cross the first change compensating member and the second change compensating member on top sides of the first change compensating member and the second change compensating member, said division masks being fixed to both sides of the opening to receive tension in a length direction, and said division masks being fixed to the first change compensating member and the second change compensating member to receive tension in a width direction, and forming a pattern opening; wherein the free end member is divided into: a first cut space disposed in the width direction of the division mask in the opening so as to compensate transformation of the frame formed in the length direction of the first change compensating member and the second change compensating member, and a second cut space disposed in the length direction of the division mask in the first cut space.