A partitioning wall is formed on one surface of a substrate. The partitioning wall has a lattice-like shape and defines a plurality of surrounded-regions. Each of the surrounded-regions is surrounded by the partitioning wall and includes a plurality of pixel-regions on which pixels are to be formed. A first predetermined region of the substrate adjacent to a part of the partitioning wall is maintained at a higher temperature, and a second predetermined region other than the first predetermined region is maintained at a lower temperature. Liquid which contains a carrier transporting material is coated on the pixel-regions in the surrounded-regions while maintaining the temperatures of the substrate.