Light-emitting device, display device having same, and method for manufacturing same

A display device comprising:

• a substrate comprising a display region and a non-display region;
• a pixel circuit layer in the display region, the pixel circuit layer comprising at least one transistor;
• and
• a display element layer comprising first to fourth insulating layers sequentially provided on the pixel circuit layer and a plurality of unit light emitting regions from which lights are emitted,
• wherein each of the unit light emitting regions comprises:
• at least one light emitting element on the first insulating layer, the at least one light emitting element comprising a first end portion and a second end portion in a length direction thereof;
• first and second banks on the pixel circuit layer, the first and second banks being spaced apart from each other at a distance;
• a first electrode on the first bank and a second electrode on the second bank;
• a first contact electrode on the first electrode, the first contact electrode connecting the first electrode and the first end portion of the light emitting element;
• a second contact electrode on the second electrode, the second contact electrode connecting the second electrode and the second end portion of the light emitting element;
• and
• a conductive pattern between the first insulating layer and the first contact electrode, the conductive pattern surrounding the first and second electrodes when viewed on a plane.

A method of fabricating a display device, the method comprising:

• providing a substrate comprising a plurality of unit light emitting regions;
• forming first and second banks spaced apart from each other at a distance in each of the unit light emitting regions;
• forming, on the substrate including the first and second banks, a first electrode, a second electrode spaced apart from the first electrode on a same plane, a first alignment line connected to the first electrode, and a second alignment line connected to the second electrode;
• forming a first insulating material layer on the first and second electrodes;
• forming a conductive pattern on the first insulating material layer to overlap with the first electrode;
• self-aligning a plurality of light emitting elements between the first and second electrodes by dropping a solution including the plurality of light emitting elements onto the first insulating material layer and applying a voltage to each of the first alignment line and the second alignment line;
• forming a first insulating material pattern exposing a portion of the first electrode by patterning the first insulating material layer;
• forming a second insulating material pattern exposing a first end portion of each of the light emitting elements, a portion of the first electrode, and the conductive pattern by coating a second insulating material layer on the first insulating material pattern and then patterning the second insulating material layer;
• removing the first alignment line and the second alignment line on the substrate;
• forming a first contact electrode connecting the exposed first end portion of each of the light emitting elements and the first electrode;
• forming a third insulating layer covering the first contact electrode on the first contact electrode, and forming first and second insulating layers exposing a second end portion of each of the light emitting elements and the second electrode by patterning the first and second insulating material patterns;
• forming a second contact electrode connecting the exposed second end portion of each of the light emitting elements and the second electrode;
• and
• forming a fourth insulating layer covering the second contact electrode on the second contact electrode.