Electroluminescence display device and manufacturing method of the same

A method for manufacturing a display device, the method comprising:

• forming a base substrate over a substrate;
• forming a first electrode over the base substrate;
• forming an insulating film covering an edge portion of the first electrode;
• forming an EL layer over the first electrode and the insulating film;
• forming a second electrode over the EL layer;
• forming, over the second electrode, a first layer comprising an inorganic compound;
• forming, over the first layer, a second layer comprising an organic compound so as to overlap with the insulating film and the EL layer;
• thinning the second layer so that the first layer is exposed in a region overlapping with the insulating film;
• forming, over the second layer, a third layer comprising an inorganic compound;
• and
• separating the substrate from the base substrate.

A display device comprising:

• a first sub-pixel and a second sub-pixel adjacent to each other and each including a light-emitting element which comprises:
• a first electrode;
• a second electrode;
• and
• an EL layer sandwiched between the first electrode and the second electrode;
• an insulating film located between the first sub-pixel and the second sub-pixel and overlapping with the first electrodes of the first sub-pixel and the second sub-pixel;
• a first layer overlapping with the light-emitting elements of the first sub-pixel and the second sub-pixel and including an inorganic compound as a main component;
• a second layer over the first layer, the second layer including an organic compound as a main component;
• and
• a third layer over the second layer, the third layer including an inorganic compound as a main component,
• wherein the second layer is divided between the first sub-pixel and the second sub-pixel.

A display device comprising:

• a light-emitting element comprising:
• a first electrode;
• an EL layer over the first electrode;
• and
• a second electrode over the EL layer;
• an insulating film underneath the EL layer, the insulating film covering an edge portion of the first electrode and having an opening portion overlapping with the first electrode;
• a first layer over the light-emitting element, the first layer including an inorganic compound as a main component;
• a second layer over the first layer, the second layer including an organic compound as a main component;
• and
• a third layer over the second layer, the third layer including an inorganic compound as a main component,
• wherein the first layer and the third layer are in contact with each other in a region overlapping with the insulating film, and
• wherein a top surface of the second layer is flat in a region overlapping with the opening portion.