Patent ID: 7987812
Filing Date: 2011-08-02
Classification: B05B,C23C,G03F,H01L

Abstract:
1. A mask assembly for depositing a thin film of a flat panel display, the mask assembly comprising: an open mask including a plurality of first openings arranged in rows and columns, the rows being formed in a first direction and the columns being formed in a second direction; and a pattern mask including a plurality of unit pattern masks; wherein a tensile force is applied to each unit pattern mask by fixing both ends of each unit pattern mask to the open mask in the first direction or the second direction; wherein the unit pattern mask is elongated, and attached to the open mask such that the elongated sides are oriented in the first direction; wherein each unit pattern mask includes a plurality of mask pattern units that correspond to a single row or column of the first openings; and wherein each mask pattern unit includes a plurality of slots that are elongated and partially extend across the width of the unit pattern mask and arranged along a portion of the length of the unit pattern mask.