Light-emitting unit, light-emitting device, lighting device, and method for manufacturing light-emitting unit

A light-emitting unit comprising:

• a first light-emitting element over an insulating surface;
• a second light-emitting element over the insulating surface;
• a separation layer;
• a first partition wall;
• and a second partition wall,
• the first light-emitting element comprising:
• a first electrode;
• a second electrode overlapping with the first electrode;
• and
• a first light-emitting layer between the first electrode and the second electrode,
• the second light-emitting element comprising:
• a third electrode;
• a fourth electrode overlapping with the third electrode;
• a second light-emitting layer between the third electrode and the fourth electrode;
• and
• an auxiliary wiring electrically connected to the third electrode;
• wherein:
• the first partition wall covers an edge portion of the first electrode;
• the second partition wall is formed over the third electrode;
• the first electrode and the third electrode are island-shaped;
• the first electrode and the third electrode are formed from the same layer that is capable of transmitting light emitted by the first light-emitting layer;
• the first partition wall and the second partition wall are formed from the same layer;
• the second electrode and the fourth electrode are formed from the same layer;
• the first light-emitting layer is at least partially in direct contact with each of a top surface of the first partition wall, a side surface of the first partition wall, a top surface of the auxiliary wiring, a side surface of the auxiliary wiring and a part of the insulating surface;
• the part of the insulating surface is between the first partition wall and the auxiliary wiring;
• the separation layer overlaps with the auxiliary wiring and the third electrode;
• the separation layer comprises a leg portion and a stage portion over the leg portion;
• a projected area of the stage portion is larger than a projected area of the leg portion;
• a first edge portion of the second partition wall is covered with the second light-emitting layer, and a second edge portion of the second partition wall is in direct contact with the separation layer;
• the second electrode is configured to extend beyond the edge portion of the first electrode with the first partition wall interposed therebetween;
• and
• the second electrode is electrically connected to the auxiliary wiring in a region overlapping with the stage portion.