Vertical micro light-emitting display with bottom contact electrode stacked on first electrode

A display device comprising:

• a substrate;
• a first electrode above one surface of the substrate;
• a contact electrode above the first electrode, and contacting the first electrode;
• a buffer layer above the contact electrode;
• an active layer of a thin film transistor above the buffer layer;
• a gate-insulating layer above the active layer;
• a gate electrode of the thin film transistor above the gate-insulating layer;
• a light-emitting element above the first electrode, and in an element contact hole penetrating the contact electrode, the buffer layer, and the gate-insulating layer;
• a first interlayer insulating layer above the gate electrode;
• and
• a first data conductive layer above the first interlayer insulating layer, and comprising a first connection electrode connected to the active layer through a first contact hole penetrating the first interlayer insulating layer and the gate-insulating layer, and connected to the contact electrode through a second contact hole penetrating the first interlayer insulating layer and the gate-insulating layer,
• wherein the element contact hole further penetrates the first interlayer insulating layer.

A tiled display device comprising:

• display devices;
• and
• a seam between the display devices,
• wherein, among the display devices, a first display device comprises:
• a substrate;
• a first electrode above one surface of the substrate;
• a contact electrode above the first electrode, and contacting the first electrode;
• a buffer layer above the contact electrode;
• an active layer of a thin film transistor above the buffer layer;
• a gate-insulating layer above the active layer;
• a gate electrode of the thin film transistor above the gate-insulating layer;
• and
• a light-emitting element above the first electrode, and in an element contact hole penetrating the contact electrode, the buffer layer, and the gate-insulating layer.