Organic el display device

An organic EL display device comprising:

• a substrate;
• a plurality of pixel regions each of which includes 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, the bank film including 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 one of the plurality of pixel regions,
• the second electrodes provided for the respective ones of the plurality of pixel regions are formed in common with second electrodes provided for the others of the plurality of pixel regions, and
• the bank film is comprised of at least one inorganic material film;
• wherein a thickness of the bank film is smaller than 1.0 μm, and
• wherein the side wall of the bank film is inclined with an angle of less than 85 degrees with respect to the principal surface of the substrate.