DEPOSITION MASK WHICH IMPROVES THE METAL-ORGANIC DEPOSITION EFFICIENCY AND A MASK ASSEMBLY INCLUDING THE SAME

摘要

PURPOSE: A deposition mask and a mask assembly including the same are provided to improve the property uniformity of an organic light emitting diode and to prevent the reduction of the metal-organic deposition efficiency by being evaporated according to design.;CONSTITUTION: Both cross section of a deposition mask is asymmetric horn shape. A first sector and a second sector have different radius or central angle. The first sector contacts the second sector in a point facing outside. A mask assembly comprises a frame which combines with a plurality of the deposition masks. The plurality of the deposition masks comprises an opening domain which copes with an active area of a substrate and a cut-off domain.;COPYRIGHT KIPO 2011