either the sub mask a or the sub mask b can be obtained in other words a panel can be produced that consumes less power than a panel manufactured using only the sub mask a although consumes more than a panel manufactured using only the sub mask b and whose color display while poorer than that of a panel manufactured using only the sub mask a is nevertheless superior to that of a panel manufactured using only the sub mask b the process described above using both of the above described sub masks a and b as shown in fig3 need not be applied to all of the r g and b colors and it is possible to only change the materials of one or two colors and to thereby impart different properties to only those pixels for which adjustment of the properties is desired fig5 shows a substrate according to embodiment 3 of the present invention on the substrate a first electrode for an organic el element is formed and an organic material and a second electrode are deposited on the first electrode to form the organic el element for each pixel according to this embodiment a pixel 6 formed by deposition of a material of a certain.