Patent ID: 8604489

Claim:
A mask frame assembly for thin film deposition, comprising: a frame including an opening portion; and a plurality of unit mask strips fixed to the frame after a tensile force is applied to both of end portions of the unit mask strips in a lengthwise direction of the unit mask strips, wherein each individual unit mask strip of the plurality of unit mask strips comprises a plurality of unit masking pattern portions, wherein each individual unit masking pattern portions comprising a plurality of opening patterns, wherein before the tensile force is applied to both of the end portions of the unit mask strips in the lengthwise direction and the unit mask strips are fixed to the frame, a width of each of the unit masking pattern portions in a widthwise direction perpendicular to the lengthwise direction increases as a function of a closeness of a portion of the unit masking pattern portion where the width is measured to a central portion of each of the unit masking pattern portions, and wherein after the tensile force is applied to both of the end portions of the unit mask strips in the lengthwise direction and the unit masking pattern portions are fixed to the frame, a distance between rightmost and leftmost opening patterns from among opening patterns existing on the same row in the widthwise direction is substantially constant in a direction from both of the end portions of each of the unit masking pattern portions in the lengthwise direction toward the central portion of each of the unit masking pattern portions.