| 摘要 |
PURPOSE: An evaporation mask is provided to improve evaporation precision of an electrode layer, a hole carrier layer and an electron carrier layer of an organic electroluminescence device, by making the evaporation mask composed of the first and second plate members which have different etch rates. CONSTITUTION: A plurality of the first slots made of a predetermined evaporation pattern are formed in the first plate member. The second slots of a predetermined standard are formed in a portion corresponding to the first slots in the second plate member which is installed in at least a part of the upper and lower surfaces of the first plate member.
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