Organic EL device and its manufacture method

A manufacture method for an organic EL device comprising steps of:

• forming a thin film transistor on a principal surface of a substrate, the thin film transistor including first and second regions as a source and a drain, a channel region between the first and second regions and a gate electrode;
• forming an interlayer insulating film over the substrate, the interlayer insulating film covering the thin film transistor;
• forming a pixel electrode disposed on the interlayer insulating film, the pixel electrode being electrically connected to the first region of the thin film transistor;
• forming a cover film disposed so as to overlap an entire outer periphery of the pixel electrode and covering an edge of the pixel electrode and an area having some width outside the outer periphery of the pixel electrode, exposing an inner area of a surface of the pixel electrode, the inner area other than the edge of the pixel electrode is not covered with the cover film, and covering a surface of the interlayer insulating film in an area superposed upon the channel region of the thin film transistor;
• wherein the cover film has a transmissivity to ultraviolet rays of 30% or lower;
• irradiating an ultraviolet ray upon the substrate from a principal surface side of the substrate, while a surface of the pixel electrode is exposed to an oxidizing atmosphere;
• forming an organic light emission layer on the pixel electrode, the organic light emission layer containing organic light emission material;
• and
• forming an upper electrode on the organic light emission layer.