| abstract |
A gravure plate useful in forming a light-emitting layer and/or a hole-injection layer of an organic light-emitting device has a plurality of cells in the shape of stripes, and non-cell portions between the cells. The proportion of the width b of each cell measured in the direction of printing to the width a of each cell measured in the direction perpendicular to the direction of printing, b/a, is 0.6 or more, and the proportion of the length L of each cell to the length S of each non-cell portion, L/S, is from 0.8 to 100. The length L of each cell is from 10 to 500 μm, the length S of each non-cell portion is from 2 to 500 μm, and the depth of the gravure plate is from 20 to 200 μm. |