Display device and method for manufacturing display device

1. A display device, comprising:

a substrate;

a circuit part configured to include a drive element formed over the substrate;

a planarization insulating layer configured to be formed on the circuit part;

an electrically-conductive layer configured to be formed on the planarization insulating layer and include a plurality of first electrodes and an auxiliary interconnect;

an aperture-defining insulating layer configured to insulate the plurality of first electrodes from each other and have an aperture through which part of the first electrode is exposed;

a plurality of light emitting elements configured to be formed by stacking the first electrode, an organic layer including a light emitting layer, and a second electrode common to the plurality of light emitting elements in that order over an exposed part of each of the plurality of first electrodes; and

a separator configured to be formed by removing the planarization insulating layer at a position surrounding a display area in which the plurality of light emitting elements connected to the drive element are disposed, wherein

in a whole area inside the separator, at least any of the electrically-conductive layer and the aperture-defining insulating layer intervenes between the planarization insulating layer and the second electrode and between the planarization insulating layer and the organic layer.

2. The display device according to claim 1 , further comprising

a contact part configured to be formed of the same layer as a metal layer included in the drive element and electrically interconnect the auxiliary interconnect and the second electrode, wherein

in the planarization insulating layer, an aperture for leading the auxiliary interconnect formed on the planarization insulating layer to a lower layer is formed above the contact part, and

an inner wall surface of the aperture by the planarization insulating layer is covered by at least any of the auxiliary interconnect and the aperture-defining insulating layer.

3. The display device according to claim 1 , wherein

an inner wall surface of an aperture by the planarization insulating layer is covered by the aperture-defining insulating layer.

4. The display device according to claim 1 , wherein

in an area that is inside the separator and is outside the display area, the aperture-defining insulating layer is so formed that coverage of the aperture-defining insulating layer, defined by an expression shown below, is a value in a range from 30% to 100%

(the coverage of the aperture-defining insulating layer)={(covering area of the aperture-defining insulating layer)/(area of the area that is inside the separator and is outside the display area)}×100%  (Expression).