Patent ID: 7332854

Claim:
An organic EL display device comprising: a substrate; a plurality of pixel regions each of which has at least a first electrode, a light emitting material layer, and a second electrode laminated in this order above a principal surface of the substrate, wherein the plurality of pixel regions are arranged two-dimensionally in the principal surface of the substrate; and a bank film formed above the principal surface of the substrate to separate respective ones of the plurality of pixel regions from others of the plurality of pixel regions adjacent to the respective ones of the plurality of pixel regions, wherein the bank film has openings each of which exposes the first electrode provided for the respective ones of the plurality of pixel regions, wherein the light emitting material layer is formed in the opening of the bank film to be extended to a side wall of the bank film lying along the opening in the respective ones of the plurality of pixel regions, wherein the second electrode provided for the respective ones of the plurality of pixel regions is formed in common with that provided for the others of the plurality of pixel regions adjacent to the respective ones or the plurality of pixel regions, and wherein the bank film is comprised of at least one inorganic material, has the side wall thereof sloped at an angle less than 85 degrees with respect to the principal surface of the substrate, and is comprised of a plurality of layers, the composition ratio of the plurality of layers being different from one another.