MASK PLATE
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United States of America Patent
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Mar 3, 2016
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Mar 20, 2015
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Abstract
The embodiments of the present invention provide a mask plate for preparing active organic electroluminescent devices, eliminating the problem of color mixing caused by the deformation of the mask plate in the prior art, improving the evaporation quality. The mask plate comprises a plurality of evaporation units arranged along the same arrangement direction; each evaporation unit is provided with a plurality of evaporation gaps arranged regularly. A shape of the evaporation gaps in at least one evaporation unit is different with that of the evaporation gaps in other evaporation units. By flexibly arranging two kinds of evaporation units having evaporation gaps with different shapes, these two kinds of evaporation units reduce stress for each other, effectively eliminating the deformation of mask plate caused by homogeneous evaporation units, thereby solving the problem of color mixing caused by the deformation of the mask plate in the prior art, improving the evaporation quality.
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