Display device including auxiliary electrode including bonding portion having plural widths

A display device comprising:

• a substrate comprising a display area in which emission areas are arranged;
• an auxiliary electrode disposed on the substrate, corresponding to at least a part of a non-emission area around each of the emission areas, the auxiliary electrode comprising:
• metal layers stacked in an undercut structure;
• a side surface including a first bonding portion and a second bonding portion;
• and
• a first side and a second side facing each other in a first direction, and a third side and a fourth side facing each other in a second direction crossing the first direction;
• a light-emitting element layer disposed on the substrate, the light-emitting element layer comprising:
• a pixel electrode corresponding to each of the emission areas;
• a pixel defining layer corresponding to the non-emission area and covering an edge of the pixel electrode;
• a first common layer disposed on the pixel electrode;
• a light-emitting layer disposed on the first common layer;
• a second common layer disposed on the light-emitting layer;
• and
• a common electrode disposed on the second common layer,
• wherein the second common layer and the common electrode extend to the non-emission area,
• the first bonding portion in contact with the second common layer, and the second bonding portion in contact with the common electrode,
• the common electrode is electrically connected to the auxiliary electrode by the second bonding portion, and
• the first bonding portion has a first width at a first point of the first side and has a second width smaller than the first width at a second point of the third side, wherein the first bonding portion has the first width at a third point of the second side and has the second width at a fourth point of the fourth side.

A display device comprising:

• a substrate comprising a display area in which emission areas are arranged;
• a circuit layer disposed on the substrate;
• a light-emitting element layer disposed on the circuit layer, the light-emitting element layer comprising:
• a pixel electrode of each of the emission areas;
• a pixel defining layer corresponding to a non-emission area and covering an edge of the pixel electrode;
• a first common layer disposed on the pixel electrode;
• a light-emitting layer disposed on the first common layer;
• a second common layer disposed on the light-emitting layer and extending to the non-emission area;
• and
• a common electrode disposed on the second common layer and extending to the non-emission area;
• and
• a sealing layer disposed on the light-emitting element layer,
• wherein one of the circuit layer and the light-emitting element layer comprises an auxiliary electrode corresponding to at least a part of the non-emission area around each of the emission areas, the auxiliary electrode comprising:
• a first side and a second side facing each other in a first direction, and a third side and a fourth side facing each other in a second direction crossing the first direction;
• a first metal layer and a second metal layer disposed on the first metal layer and including an edge protruding beyond the first metal layer;
• a side surface including:
• a first bonding portion in contact with the second common layer;
• a second bonding portion in contact with the common electrode;
• and
• a third bonding portion in contact with the sealing layer, and
• the first bonding portion has a first width at a first point that is part of the first side and the second side and has a second width smaller than the first width at a second point that is part of the third side and the fourth side.