Organic electroluminescent display device and method for producing same

An organic electroluminescent device, comprising:

• an element substrate including a substrate and a plurality of organic electroluminescent elements supported by the substrate;
• a thin film encapsulation structure formed on the plurality of organic electroluminescent elements, the thin film encapsulation structure including at least one composite stack body that includes a first inorganic barrier layer, an organic barrier layer including a plurality of solid portions in contact with a top surface of the first inorganic barrier layer and distributed discretely, and a second inorganic barrier layer in contact with the top surface of the first inorganic barrier layer and top surfaces of the plurality of solid portions of the organic barrier layer;
• an organic flattening layer provided on the thin film encapsulation structure and formed of a photosensitive resin;
• a touch sensor layer located on the organic flattening layer;
• and
• a driving circuit supported by the substrate, a plurality of terminals located in a peripheral region, and a plurality of lead wires connecting the driving circuit and the plurality of terminals to each other,
• wherein the thin film encapsulation structure is selectively formed at least on an active region in which the plurality of organic electroluminescent elements is located and on portions, of the plurality of lead wires, that is closer to the driving circuit, and is in contact with at least portions of the plurality of lead wires,
• each of the plurality of lead wires has at least a tapering portion that has a side surface having a tapering angle smaller than 90 degrees in a cross-section of each of the lead wires that is taken along a plane parallel to a line width direction thereof,
• the thin film encapsulation structure includes an inorganic barrier layer joint portion where no organic barrier layer is present and the first inorganic barrier layer and the second inorganic barrier layer are in direct contact with each other, and
• the inorganic barrier layer joint portion is formed on a region including the tapering portion of each of the plurality of lead wires and completely encloses the active region.