| abstract |
The present invention provides a mask for production of an organic EL element, an apparatus for producing an organic EL element, and a method for producing an organic EL element which can give reduced luminance unevenness and eased restrictions in the production apparatus. The mask of the present invention includes first to fourth opening regions arranged in a staggered pattern, the first, second, third, and fourth opening regions arranged in the given order in a first direction, the first, second, third, and fourth opening regions respectively including first, second, third, and fourth mask openings in a second direction perpendicular to the first direction, the mask including no mask openings on the side of the first opening region opposite to the third opening region, the first and second mask openings each having a shorter length in the first direction than each of the third and fourth mask openings. |